{ "data": { "a": { "slug": "flagsmith", "name": "Flagsmith", "vendor": "Bullet Train Ltd", "vendorUrl": "https://www.flagsmith.com", "kind": "http-api", "category": "product-analytics", "summary": "Flagsmith is an open-source feature flag, remote config and experimentation service from Bullet Train Ltd. Teams use it on Flagsmith Cloud or self-hosted, through SDKs, a Management API and a remote MCP server.", "url": "https://www.anchorterminal.com/tools/flagsmith", "markdownUrl": "https://www.anchorterminal.com/tools/flagsmith.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/flagsmith.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/flagsmith.json", "dns": "flagsmith.grade.anchorterminal.com", "repo": "https://github.com/Flagsmith/flagsmith", "license": "BSD-3-Clause", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://mcp.flagsmith.com", "packages": [ { "registry": "pypi", "name": "flagsmith" }, { "registry": "npm", "name": "flagsmith" } ], "auth": "mixed", "authNotes": "The hosted MCP server takes OAuth (the client discovers Flagsmith as the authorisation server and a person signs in) or an Organisation API key sent as `Authorization: Api-Key \u003ckey\u003e`. Organisation keys act as full organisation admin or with chosen RBAC roles; granular roles need Scale-Up or Enterprise. OIDC trust relationships let CI workloads such as GitHub Actions exchange their token for a short-lived one. SDK environment keys are separate.", "pricing": "freemium", "pricingNotes": "Free plan at $0 with 50,000 requests a month and one team member. Start-Up is $45 a month ($40 billed yearly) for 1,000,000 requests and three members, Scale-Up $300 a month ($250 yearly) for 5,000,000. Enterprise by quote. Extra API calls from $50 per million; the page also quotes $7 per 100,000 for Start-Up. The self-hosted edition is free under BSD-3-Clause.", "priceSummary": "$45 / mo", "where": "both", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, the OpenAPI spec or the pricing page (checked 2026-11-06).", "endpoints": [] }, "toolCount": 54, "popularity": { "githubStars": 6639, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-06" }, "docsUrl": "https://docs.flagsmith.com/", "openapi": "https://github.com/Flagsmith/flagsmith/blob/main/openapi.yaml", "capabilities": [ "analytics.flags", "analytics.experiments", "analytics.events" ], "tags": [ "official", "hosted", "open-source", "self-hosted", "mcp", "remote-mcp", "oauth", "openapi", "free-tier", "status-page", "soc2", "sla", "python", "typescript" ], "lastRelease": "2026-11-05", "graded": true, "anchor": { "graded": true, "score": 61.2, "grade": "C", "agentReady": false, "rank": 620, "ranked": true, "rankOf": 1486, "categoryRank": 12, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 55, "maintenance": 83, "payments": 40, "reliability": 65, "schema": 67, "security": 65, "transparency": 77 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-06" }, "negative": -2, "negativeNotes": [ "6 November 2026. The self-hosted API sends a heartbeat to https://api.flagsmith.com/api/v1/analytics/telemetry/ with counts of organisations, projects, environments, feature flags, segments and users, on by default (`ENABLE_TELEMETRY = env.bool(\"ENABLE_TELEMETRY\", default=True)`). The flag isn't in the environment-variable reference or anywhere else in the docs we read. Counts only, self-hosted only, so the minimum deduction (https://github.com/Flagsmith/flagsmith/blob/main/api/app/settings/common.py ; https://github.com/Flagsmith/flagsmith/blob/main/api/telemetry/telemetry.py)." ], "verdict": "Flagsmith pairs a BSD-licensed core with a hosted MCP server whose 54 tools come from its OpenAPI spec and carry read and destructive hints. A public 99.95 per cent SLA and SOC 2 report back the Cloud service. The MCP server is still an early release, and fine-grained key roles need a paid Scale-Up or Enterprise plan.", "bestFor": "Feature flags and experiments for teams that want open source or self-hosting, managed by an agent through MCP.", "strengths": [ "Hosted MCP server at mcp.flagsmith.com with OAuth or an Organisation API key, and a stdio option for local use", "Each of the 54 MCP tools has readOnlyHint, destructiveHint and idempotentHint set from its HTTP method", "Public SLA of 99.95 per cent monthly uptime with service credits, and a status page with component history", "BSD-3-Clause source with a free self-hosted edition and 34 tagged releases in the last 90 days", "OIDC trust relationships let CI jobs get short-lived Management API tokens without stored secrets" ], "weaknesses": [ "The MCP docs call the server an early release, and experiment tools are marked beta", "54 tools load at once, with no toolsets or read-only mode on the server", "Granular API key roles, change requests and audit logs need Scale-Up or Enterprise", "No llms.txt, no documented 429 handling, and few documented error responses in the spec", "Self-hosted installs send a usage heartbeat by default through a flag the docs don't mention" ], "agentNotes": [ "Send the key as `Authorization: Api-Key \u003ckey\u003e`; the `Api-Key ` prefix is required and a bare key fails", "Check whether the environment uses v2 feature versioning before choosing between segment-override and version-state tools", "Use a key with a read-only RBAC role for analysis tasks, since a Free plan key has organisation admin rights", "Pace Management API calls under 500 a minute; no Retry-After guidance is documented", "Treat experiment results as possibly null until Flagsmith has computed them" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 61.2 } ], "editorialScores": { "ergonomics": 55, "maintenance": 83, "payments": 40, "reliability": 65, "schema": 67, "security": 65, "transparency": 67 }, "provenanceScore": 86, "checked": { "categories": { "ergonomics": "2026-11-06", "maintenance": "2026-11-06", "payments": "2026-11-06", "reliability": "2026-11-06", "schema": "2026-11-06", "security": "2026-11-06", "transparency": "2026-11-06" }, "last": "2026-11-06", "oldest": "2026-11-06", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl -H \"Authorization: Api-Key $FLAGSMITH_ORG_KEY\" https://api.flagsmith.com/api/v1/projects/", "claudeCode": "claude mcp add --transport http flagsmith https://mcp.flagsmith.com", "config": { "mcpServers": { "flagsmith": { "headers": { "Authorization": "Api-Key \u003cyour-api-key\u003e" }, "url": "https://mcp.flagsmith.com" } } } }, "letme": { "capability": "https://letme.dev/analytics.flags", "tool": "https://letme.dev/flagsmith" }, "area": "business", "unitPrices": [ { "item": "Start-Up plan", "unit": "month", "usd": 45, "note": "1,000,000 requests and 3 team members; $40 a month billed yearly" }, { "item": "Scale-Up plan", "unit": "month", "usd": 300, "note": "5,000,000 requests and 5 team members; $250 a month billed yearly" }, { "item": "Extra API calls", "unit": "1k-requests", "usd": 0.05, "note": "From $50 per million, lower with volume" }, { "item": "Extra Scale-Up team member", "unit": "seat-month", "usd": 50, "note": "Up to 20 members" } ], "provenance": { "legalEntity": "Bullet Train Ltd", "domain": "flagsmith.com", "domainRegistered": "2018-03-01", "endpointOnVendorDomain": true, "terms": "https://www.flagsmith.com/terms-of-service", "privacy": "https://www.flagsmith.com/privacy-policy", "statusPage": "https://status.flagsmith.com", "changelog": "https://github.com/Flagsmith/flagsmith/blob/main/CHANGELOG.md", "securityTxt": "none", "checked": "2026-11-06", "notes": [ "The terms of service name Bullet Train Limited trading as Flagsmith, company number 12353266, registered at 66 Paul St, London, under the laws of England and Wales. Companies House lists the company with five active officers.", "The privacy policy was last updated in October 2023; the GDPR sub-processor list is dated 13 October 2025.", "www.flagsmith.com/robots.txt disallows only sign-up, login and similar paths. docs.flagsmith.com has no robots.txt. The terms contain no clause on automated access that we found.", "www.flagsmith.com/.well-known/security.txt returned 404. SECURITY.md in the repository asks for reports to support@flagsmith.com.", "RDAP gives flagsmith.com a registration date of 1 March 2018." ], "score": 86 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/flagsmith.json", "live": { "slug": "flagsmith", "probe": { "target": "https://mcp.flagsmith.com", "method": "get", "lastAt": "2026-11-07T18:20:25.400493249Z", "lastOk": true, "lastStatus": 401, "lastMs": 94, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 27, "p95ms24h": 100, "samples24h": 200, "samples30d": 200, "days": [ { "date": "2026-11-06", "probes": 13, "ok": 13 }, { "date": "2026-11-07", "probes": 187, "ok": 187 } ] }, "vendorStatus": { "page": "https://status.flagsmith.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T18:21:11.347876696Z" }, "versions": [ { "registry": "github", "name": "Flagsmith/flagsmith", "version": "v2.290.0", "released": "2026-11-05", "seenAt": "2026-11-06T23:26:24.068130998Z" }, { "registry": "npm", "name": "flagsmith", "version": "10.0.0", "seenAt": "2026-11-06T23:26:23.147625706Z" }, { "registry": "pypi", "name": "flagsmith", "version": "6.5.0", "released": "2026-11-06", "seenAt": "2026-11-06T23:26:23.005711379Z" } ], "githubStars": 6642, "npmWeekly": 156837, "pypiWeekly": 401488, "securityTxt": { "url": "https://flagsmith.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:01:18.95883898Z" }, "pages": [ { "url": "https://raw.githubusercontent.com/Flagsmith/flagsmith/main/CHANGELOG.md", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:18:21.223652009Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "34b306151856" }, { "url": "https://www.flagsmith.com/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:28:36.671052285Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "ba6cc5c7a64f" }, { "url": "https://www.flagsmith.com/terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:28:38.746283857Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "6ada20e0c356" } ], "mcpTools": { "url": "https://mcp.flagsmith.com", "checkedAt": "2026-11-07T01:44:38.567136868Z", "status": "auth", "note": "asks for credentials before listing its tools", "changedAt": "2026-11-07T01:44:38.567136868Z" }, "updatedAt": "2026-11-07T18:21:11.347876696Z" } }, "answer": "Statsig scores 72.4 (BB) on agent readiness against Flagsmith's 61.2 (C), and leads in 4 of 7 scored categories.", "b": { "slug": "statsig", "name": "Statsig", "vendor": "Amplitude, Inc.", "vendorUrl": "https://www.statsig.com", "kind": "http-api", "category": "product-analytics", "summary": "Statsig is a hosted platform for feature flags, experiments and product analytics, run by Amplitude, Inc. since May 2026. Agents reach it through the Console API, which has a public OpenAPI spec, and an official hosted MCP server.", "url": "https://www.anchorterminal.com/tools/statsig", "markdownUrl": "https://www.anchorterminal.com/tools/statsig.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/statsig.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/statsig.json", "dns": "statsig.grade.anchorterminal.com", "repo": "https://github.com/statsig-io/statsig-server-core", "license": "Proprietary hosted service under Statsig's self-service or enterprise terms. The SDKs and the agent skills repository on GitHub are ISC", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.statsig.com/v3/mcp", "packages": [ { "registry": "npm", "name": "@statsig/statsig-node-core" }, { "registry": "npm", "name": "@statsig/js-client" }, { "registry": "pypi", "name": "statsig-python-core" }, { "registry": "npm", "name": "@statsig/siggy" } ], "auth": "mixed", "authNotes": "Self-serve. The Console API takes a Console API key in the `STATSIG-API-KEY` header, created in project settings as read-only or read and write. The MCP server uses OAuth with PKCE and dynamic client registration, which issues a personal Console API key carrying the user's role, or takes a Console key in the `statsig-api-key` header. OAuth needs the organisation owner to allow personal keys for the role. Flag evaluation and event logging take a client or server SDK key.", "pricing": "freemium", "pricingNotes": "Free Developer plan with no card, covering 2 million events and 50,000 session replays a month. Pro is $150 a month with 5 million events, then $0.05 per 1,000 events. Enterprise is by contract. Flag and config checks are unlimited on every plan, and API and MCP calls are not billed. An agent can start on the free plan without a contract (https://www.statsig.com/pricing, checked 2026-10-08).", "priceSummary": "$150 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs corpus, the OpenAPI spec or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": 18, "popularity": { "githubStars": null, "npmWeekly": 4157066, "pypiWeekly": 893619, "asOf": "2026-10-08" }, "docsUrl": "https://docs.statsig.com/console-api/introduction", "llmsTxt": "https://docs.statsig.com/llms.txt", "openapi": "https://api.statsig.com/openapi/20240601.json", "registryName": "com.statsig/statsig-mcp-server", "capabilities": [ "analytics.experiments", "analytics.flags", "analytics.query", "analytics.events" ], "tags": [ "official", "hosted", "mcp", "oauth", "openapi", "llms-txt", "free-tier", "no-card", "status-page", "soc2", "eu-region" ], "lastRelease": "2026-10-28", "graded": true, "anchor": { "graded": true, "score": 72.4, "grade": "BB", "agentReady": true, "rank": 127, "ranked": true, "rankOf": 1486, "categoryRank": 1, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 71, "maintenance": 81, "payments": 40, "reliability": 79, "schema": 82, "security": 74, "transparency": 76 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-01" }, "negative": 0, "verdict": "Statsig suits agents that manage feature gates and experiments and read their results. Its MCP server has 18 default tools, OAuth, read-only access by project and role, and a confirmation on updates. Errors carry only a status and a message, no idempotency keys were found, and the privacy notice is Amplitude's and doesn't name Statsig.", "bestFor": "An agent that creates, updates and cleans up feature gates, dynamic configs and experiments, and reads experiment results and audit history.", "strengths": [ "Hosted MCP server with 18 default tools and a discovery layer that replaced 93 tools on the V1 server", "MCP access set per project and per role as no access, read only or read and write, with a confirmation on updates", "Public OpenAPI 3.0 spec with 325 operations per the 8 October check, plus llms.txt and a Markdown copy of every docs page", "Free Developer plan with no card and 2 million events a month, and a public overage price of $0.05 per 1,000 events on Pro", "Audit logs kept indefinitely and readable through the API and the `log_read` MCP tool" ], "weaknesses": [ "Console API errors carry only `status` and `message`, and the spec documents no 429 response", "No idempotency keys were found, and most MCP update tools replace the whole resource", "The project Console API key reads and writes everything in a project unless created read-only", "The privacy notice is Amplitude's, last updated 31 August 2026, and doesn't name Statsig", "The 99.95 per cent SLA needs Enterprise premium support and covers the Console user interface" ], "agentNotes": [ "Connect to https://api.statsig.com/v3/mcp. The official MCP registry entry still lists the V1 URL, which has 93 tools", "Call `get_context` first to learn the project, your permissions and the review settings", "Read the resource before `gate_update`, `experiment_update` or `dynamic_config_update`. They replace the whole resource, so resend every field you want kept", "Use `discover_tools` for partial edits, and fetch a fresh `operationHandle` when one expires", "On a 429 slow down and back off with jitter. Rejected attempts count towards the quota of about 1,800 mutations per 15 minutes" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 4, "avgRating": 3.8, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 72.4 } ], "editorialScores": { "ergonomics": 71, "maintenance": 81, "payments": 40, "reliability": 79, "schema": 82, "security": 74, "transparency": 64 }, "provenanceScore": 87, "checked": { "categories": { "ergonomics": "2026-11-01", "maintenance": "2026-11-01", "payments": "2026-11-01", "reliability": "2026-11-01", "schema": "2026-11-01", "security": "2026-11-01", "transparency": "2026-11-01" }, "last": "2026-11-01", "lastMoved": "2026-10-28", "oldest": "2026-11-01", "stale": false, "staleAfterDays": 90 } }, "connect": { "claudeCode": "claude mcp add --transport http statsig https://api.statsig.com/v3/mcp", "config": { "mcpServers": { "statsig": { "url": "https://api.statsig.com/v3/mcp" } } } }, "letme": { "capability": "https://letme.dev/analytics.experiments", "tool": "https://letme.dev/statsig" }, "area": "business", "unitPrices": [ { "item": "Pro plan", "unit": "month", "usd": 150, "note": "5 million events and 100,000 session replays included" }, { "item": "Metered event", "unit": "tx", "usd": 0.00005, "note": "Pro plan, above 5 million a month" } ], "provenance": { "legalEntity": "Amplitude, Inc.", "domain": "statsig.com", "domainRegistered": "1998-12-29", "endpointOnVendorDomain": true, "terms": "https://www.statsig.com/terms", "privacy": "https://amplitude.com/privacy", "statusPage": "https://status.statsig.com", "changelog": "https://www.statsig.com/updates", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The self-service subscription agreement at statsig.com/terms, effective 4 August 2025, names Amplitude, Inc. as the party called Statsig. The enterprise terms (effective 18 February 2026) and the DPA do the same.", "statsig.com/privacy redirects to amplitude.com/privacy, a notice last updated 31 August 2026 that covers Amplitude, Inc. and its affiliates and doesn't name Statsig. It says it does not apply to end-user data that customers send to the product.", "statsig.com/legal/subprocessors redirects to amplitude.com/subprocessor-list, last updated 13 May 2026, which marks the providers used for Statsig-branded services.", "The MCP server answers at api.statsig.com. The Console API answers at statsigapi.net, a second domain the vendor's docs name.", "www.statsig.com/.well-known/security.txt returns 404.", "RDAP for statsig.com gives a registration date of 1998-12-29." ], "score": 87 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/statsig.json", "live": { "slug": "statsig", "probe": { "target": "https://api.statsig.com/v3/mcp", "method": "get", "lastAt": "2026-11-07T18:20:57.106006261Z", "lastOk": true, "lastStatus": 401, "lastMs": 90, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 38, "p95ms24h": 105, "samples24h": 239, "samples30d": 7440, "days": [ { "date": "2026-10-08", "probes": 70, "ok": 70 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 249, "ok": 249 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 252 }, { "date": "2026-10-17", "probes": 253, "ok": 253 }, { "date": "2026-10-18", "probes": 256, "ok": 256 }, { "date": "2026-10-19", "probes": 255, "ok": 255 }, { "date": "2026-10-20", "probes": 252, "ok": 252 }, { "date": "2026-10-21", "probes": 253, "ok": 253 }, { "date": "2026-10-22", "probes": 253, "ok": 253 }, { "date": "2026-10-23", "probes": 248, "ok": 248 }, { "date": "2026-10-24", "probes": 251, "ok": 251 }, { "date": "2026-10-25", "probes": 250, "ok": 250 }, { "date": "2026-10-26", "probes": 252, "ok": 252 }, { "date": "2026-10-27", "probes": 249, "ok": 249 }, { "date": "2026-10-28", "probes": 250, "ok": 250 }, { "date": "2026-10-29", "probes": 249, "ok": 249 }, { "date": "2026-10-30", "probes": 249, "ok": 249 }, { "date": "2026-10-31", "probes": 251, "ok": 251 }, { "date": "2026-11-01", "probes": 249, "ok": 249 }, { "date": "2026-11-02", "probes": 250, "ok": 250 }, { "date": "2026-11-03", "probes": 248, "ok": 248 }, { "date": "2026-11-04", "probes": 246, "ok": 246 }, { "date": "2026-11-05", "probes": 185, "ok": 185 }, { "date": "2026-11-06", "probes": 241, "ok": 241 }, { "date": "2026-11-07", "probes": 187, "ok": 187 } ] }, "vendorStatus": { "page": "https://status.statsig.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T18:22:03.265649509Z" }, "versions": [ { "registry": "github", "name": "statsig-io/statsig-server-core", "version": "0.24.2", "released": "2026-11-06", "seenAt": "2026-11-07T00:08:26.667471698Z" }, { "registry": "mcp-registry", "name": "com.statsig/statsig-mcp-server", "version": "1.0.0", "seenAt": "2026-11-07T18:16:28.95801333Z" }, { "registry": "npm", "name": "@statsig/js-client", "version": "3.33.8", "seenAt": "2026-11-07T00:08:22.944088803Z" }, { "registry": "npm", "name": "@statsig/siggy", "version": "0.0.4", "seenAt": "2026-11-07T00:08:24.797062329Z" }, { "registry": "npm", "name": "@statsig/statsig-node-core", "version": "0.24.2", "seenAt": "2026-11-07T00:08:22.466595727Z" }, { "registry": "pypi", "name": "statsig-python-core", "version": "0.24.2", "released": "2026-11-06", "seenAt": "2026-11-07T00:08:24.650927632Z" } ], "githubStars": 24, "npmWeekly": 1691593, "pypiWeekly": 1020869, "securityTxt": { "url": "https://statsig.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:01:09.441235194Z" }, "llmsTxt": { "url": "https://docs.statsig.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:34:02.780586563Z" }, "domain": { "domain": "statsig.com", "registered": "1998-12-29", "source": "https://rdap.verisign.com/com/v1/domain/statsig.com", "checkedAt": "2026-11-01T14:08:46.011840445Z" }, "pages": [ { "url": "https://www.statsig.com/updates", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:35:09.364215881Z", "changedAt": "2026-11-06T13:55:37.429098458Z", "fingerprint": "99420812e795" }, { "url": "https://www.statsig.com/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-11-07T14:35:04.36786338Z", "changedAt": "2026-10-23T02:07:16.258880643Z", "fingerprint": "87ef02db6355" }, { "url": "https://www.statsig.com/terms", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:35:07.111577548Z", "changedAt": "2026-10-23T02:07:18.656882729Z", "fingerprint": "036fc50be6dc" } ], "mcpTools": { "url": "https://api.statsig.com/v3/mcp", "checkedAt": "2026-11-07T01:48:08.93079327Z", "status": "auth", "note": "asks for credentials before listing its tools", "changedAt": "2026-11-07T01:48:08.93079327Z" }, "github": { "repo": "statsig-io/statsig-server-core", "checkedAt": "2026-11-02T09:28:04.214538182Z", "stars": 24, "archived": false, "issuesEnabled": true, "pushedAt": "2026-10-28T15:41:59Z", "openIssues": 23, "openPRs": 15, "issuesOpened90d": 9, "issuesClosed90d": 0, "prsMerged90d": 0, "ci": { "branch": "main", "runs": 50, "success": 0, "failure": 50, "other": 0, "latest": "failure", "latestAt": "2026-10-28T19:07:05Z" }, "replies": { "sampled": 25, "unanswered": 22, "medianDays": 3.2 } }, "updatedAt": "2026-11-07T18:22:03.265649509Z" } }, "edges": [ { "by": 16, "category": "ergonomics", "leads": "statsig", "name": "Agent ergonomics", "reasons": { "a": "54 tools, more than 30, with no toolsets or read-only subset; enterprise tools only appear where installed (5 of 25). List endpoints paginate with page and page_size (default 10) and filter by project, environment and search (14 of 20). Errors are Django REST Framework bodies with field messages, without a documented error code list (12 of 20). Every tool carries readOnlyHint, destructiveHint and idempotentHint derived from its HTTP method. No idempotency keys for POST (14 of 20). Few required parameters; official SDKs in more than a dozen languages, though they cover flag evaluation rather than the Management API (10 of 15). 5+14+12+14+10 = 55.", "b": "The MCP V3 server shows 18 default tools, which is 15 on the checklist. Add back 8 for the discovery layer that reaches other operations on demand, `query_fields` on experiment reads and read-only access (23 of 25). `limit` and `page` on 49 list operations with pagination metadata per the 8 October check, a cursor on the Logs Explorer query, and filters by tag, status, creator and date (17 of 20). Errors are a `status` and a `message` with no machine code, and MCP results set `isError` (11 of 20). No idempotency keys were found. Updates and `api_destructive` calls need a `confirmation` object, and operations are split into read, write and destructive lanes. We could not read the live tool annotations (10 of 20). The SDKs cover flag evaluation and event logging in many languages, not the Console API, and the `siggy` CLI on npm is version 0.0.4 from September 2024 (10 of 15)." }, "scores": { "a": 55, "b": 71 } }, { "by": 15, "category": "schema", "leads": "statsig", "name": "Schema \u0026 documentation", "reasons": { "a": "openapi.yaml in the repository is OpenAPI 3.1 with 624 operations, and the MCP server builds its 54 tools from the operations tagged `mcp`, so every tool has a JSON Schema input (25). No llms.txt (404) and no Markdown served for agents on docs.flagsmith.com; the docs are Markdown only in the repository (0). Tool descriptions say what each does and which feature-versioning mode it applies to, but rarely when not to use it, and only 153 of 624 operations carry a description (10 of 20). 57 enums and required fields in the spec, with some free-form value fields (10 of 15). Docs carry curl examples, but only 16 operations document a 400 and 6 a 404 (7 of 15). A /api/v1 path, release-please changelog and dated release notes (15). 25+0+10+10+7+15 = 67.", "b": "Public OpenAPI 3.0 spec for Console API version 20240601 with 209 paths and 325 operations, per the 8 October check, not re-read on 1 November, and typed MCP tools per the tool reference (25). llms.txt, llms-full.txt, a Markdown copy of each page and a public docs MCP server (10). Every operation has a summary but only 29 of 325 have a description, per the 8 October check. The MCP tool reference states each tool's purpose and when to ask the user first (11 of 20). 1,164 enums across 188 schemas, with required fields marked, per the 8 October check (12 of 15). Examples on most responses. The spec documents 401 on 156 operations, 404 on 126 and 400 on 106, and no 429, per the 8 October check (11 of 15). A dated API version sent in the `STATSIG-API-VERSION` header with a promise not to break a version, and a dated product updates page. No changelog for the API alone was found (13 of 15)." }, "scores": { "a": 67, "b": 82 } }, { "by": 14, "category": "reliability", "leads": "statsig", "name": "Reliability", "reasons": { "a": "Graded on Flagsmith Cloud with the hosted lines. Statuspage at status.flagsmith.com with components for the Edge API, Admin API, dashboard and website (20). In the 90 days from 8 August, an Admin and SDK API outage on 28 October marked critical, posted at 21:56 UTC and resolved at 22:12 with no cause given, and a minor delay in processing flag changes on 10 September. The posted span of the outage is 16 minutes and its start isn't stated, so we read it as one serious incident under an hour (15 of 30). The Management API limit of 500 requests a minute is documented (15). No 429 handling, Retry-After or idempotency guidance was found in the docs (0). A public SLA commits to 99.95 per cent monthly uptime with service credits (10). The Management API is generally available, but the MCP docs call the server an early release, so half (5 of 10). 20+15+15+0+10+5 = 65.", "b": "Graded on the hosted service with the hosted lines. Statuspage at status.statsig.com with 14 components, among them Console API, Config Delivery API and Log Event API (20). Three incidents between 3 August and 1 November 2026, all Warehouse Native delays (export delays from 6 August resolved 8 August, delayed exposure results on 26 August and its follow-up resolved 31 August), marked minor or none per the 8 October check, and nothing posted since 31 August (20 of 30). The 8 July 2026 major, when launched gates returned false through the V2 Config Delivery API for about 4 hours 44 minutes, is outside the window. The docs give about 1,800 mutation attempts per 15 minutes per project, while the OpenAPI description gave about 100 per 10 seconds and 900 per 15 minutes per the 8 October check, and no number was found for reads (12 of 15). The docs ask for exponential backoff with jitter on 429. No `Retry-After` header and no idempotency keys were found (10 of 15). The enterprise terms give 99.95 per cent monthly availability with credits, for customers with premium support, measured on the Console user interface (7 of 10). The Console API is versioned and the MCP V3 docs carry no beta label (10)." }, "scores": { "a": 65, "b": 79 } }, { "by": 9, "category": "security", "leads": "statsig", "name": "Security \u0026 auth", "reasons": { "a": "OAuth for interactive MCP clients with Flagsmith as the authorisation server, Organisation API keys in the Authorization header that act as admin or with chosen RBAC roles, and OIDC trust relationships that swap a CI token for a short-lived one. Granular key roles need Scale-Up or Enterprise, so a Free key is all-powerful (25 of 30). RBAC roles can limit a key to reads, and change requests put a flag change through approval on Scale-Up and Enterprise. There is no read-only switch on the MCP server itself (14 of 20). No prompt-injection guidance; tools return names, descriptions and trait values written by people (3 of 15). Audit logs record every admin action and stream by webhook, on Scale-Up and Enterprise (11 of 15). The docs say Flagsmith has a SOC 2 Type 2 report available on request, the terms promise a yearly third-party penetration test, and SECURITY.md routes reports to support email. No security.txt, bug bounty or public advisory process was found (12 of 20). 25+14+3+11+12 = 65.", "b": "OAuth for the MCP server with PKCE, dynamic client registration and a device code grant, issuing personal Console API keys that carry the user's role. Console keys can be created read-only or read and write, and rotated or deactivated through the API. The OAuth metadata lists no scopes, and a project Console key reaches every Console API endpoint (25 of 30). MCP scope is set per project and per role as no access, read only or read and write. Updates and destructive operations need a confirmation, and project review policies still apply (19 of 20). No guidance on prompt injection was found, though tools return names, descriptions and log data that people wrote. The docs tell users to review each change before the agent confirms (4 of 15). Audit logs are kept indefinitely with an API, and personal keys attribute changes to a user (14 of 15). SOC 2 Type II and a bug bounty programme are stated on the security page, with no public programme link and no security.txt (12 of 20)." }, "scores": { "a": 65, "b": 74 } } ], "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Bullet Train Ltd", "b": "Amplitude, Inc.", "name": "Vendor" }, { "a": "https://mcp.flagsmith.com", "b": "https://api.statsig.com/v3/mcp", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP, stdio", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "BSD-3-Clause", "b": "Proprietary hosted service under Statsig's self-service or enterprise terms. The SDKs and the agent skills repository on GitHub are ISC", "name": "Licence" }, { "a": "54", "b": "18", "name": "Tools exposed" }, { "a": "yes", "b": "no", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "not listed", "b": "com.statsig/statsig-mcp-server", "name": "MCP registry" }, { "a": "2026-11-05", "b": "2026-10-28", "name": "Last release" }, { "a": "2026-09-01", "b": "2025-08-04", "name": "Terms last updated" }, { "a": "2023-10-01", "b": "2026-08-31", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "6.6k stars", "b": "4.2M npm/wk, 894k PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "3.8/5 (4)", "name": "Agent reviews" } ], "faq": [ { "answer": "Statsig scores 72.4 (BB) on agent readiness against Flagsmith's 61.2 (C), and leads in 4 of 7 scored categories.", "question": "Which is better for AI agents, Flagsmith or Statsig?" }, { "answer": "Both take an API key or an OAuth sign-in.", "question": "Do Flagsmith and Statsig need an API key?" }, { "answer": "Yes. Flagsmith has a hosted endpoint at https://mcp.flagsmith.com and Statsig at https://api.statsig.com/v3/mcp.", "question": "Can an agent call Flagsmith and Statsig without installing anything?" }, { "answer": "Flagsmith is open source (BSD-3-Clause). No open-source release is listed for Statsig.", "question": "Are Flagsmith and Statsig open source?" } ], "goodFor": [ { "aheadOn": null, "also": [ "Runs on your own machine", "Open source" ], "goodFor": "Feature flags and experiments for teams that want open source or self-hosting, managed by an agent through MCP.", "slug": "flagsmith", "watchFor": "The MCP docs call the server an early release, and experiment tools are marked beta" }, { "aheadOn": [ "Reliability, 79 against 65", "Schema \u0026 documentation, 82 against 67", "Agent ergonomics, 71 against 55", "Security \u0026 auth, 74 against 65" ], "also": [ "Agent-ready, a grade of BB or better", "Free to start without a card" ], "goodFor": "An agent that creates, updates and cleans up feature gates, dynamic configs and experiments, and reads experiment results and audit history.", "slug": "statsig", "watchFor": "Console API errors carry only `status` and `message`, and the spec documents no 429 response" } ], "history": { "flagsmith": null, "statsig": [ { "causes": [ "evidence" ], "date": "2026-10-28", "delta": 0.1, "from": 72.3, "fromGrade": "BB", "to": 72.4, "toGrade": "BB" } ] }, "job": { "capability": "analytics.flags", "name": "Feature flags" }, "others": [ { "json": "https://www.anchorterminal.com/compare/amplitude-vs-statsig.json", "title": "Amplitude vs Statsig", "url": "https://www.anchorterminal.com/compare/amplitude-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/countly-vs-statsig.json", "title": "Countly vs Statsig", "url": "https://www.anchorterminal.com/compare/countly-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/fullstory-vs-statsig.json", "title": "Fullstory vs Statsig", "url": "https://www.anchorterminal.com/compare/fullstory-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/matomo-vs-statsig.json", "title": "Matomo vs Statsig", "url": "https://www.anchorterminal.com/compare/matomo-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/mixpanel-vs-statsig.json", "title": "Mixpanel vs Statsig", "url": "https://www.anchorterminal.com/compare/mixpanel-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/mostly-good-metrics-vs-statsig.json", "title": "Mostly Good Metrics vs Statsig", "url": "https://www.anchorterminal.com/compare/mostly-good-metrics-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/openpanel-vs-statsig.json", "title": "OpenPanel vs Statsig", "url": "https://www.anchorterminal.com/compare/openpanel-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/pendo-vs-statsig.json", "title": "Pendo vs Statsig", "url": "https://www.anchorterminal.com/compare/pendo-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/posthog-vs-statsig.json", "title": "PostHog vs Statsig", "url": "https://www.anchorterminal.com/compare/posthog-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/statsig-vs-userpilot.json", "title": "Statsig vs Userpilot", "url": "https://www.anchorterminal.com/compare/statsig-vs-userpilot" }, { "json": "https://www.anchorterminal.com/compare/statsig-vs-woopra.json", "title": "Statsig vs Woopra", "url": "https://www.anchorterminal.com/compare/statsig-vs-woopra" }, { "json": "https://www.anchorterminal.com/compare/amplitude-vs-flagsmith.json", "title": "Amplitude vs Flagsmith", "url": "https://www.anchorterminal.com/compare/amplitude-vs-flagsmith" }, { "json": "https://www.anchorterminal.com/compare/countly-vs-flagsmith.json", "title": "Countly vs Flagsmith", "url": "https://www.anchorterminal.com/compare/countly-vs-flagsmith" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-growthbook.json", "title": "Flagsmith vs GrowthBook", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-growthbook" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-harness-fme.json", "title": "Flagsmith vs Harness Feature Management \u0026 Experimentation", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-harness-fme" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-launchdarkly.json", "title": "Flagsmith vs LaunchDarkly", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-launchdarkly" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-mixpanel.json", "title": "Flagsmith vs Mixpanel", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-mixpanel" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-optimizely.json", "title": "Flagsmith vs Optimizely Experimentation", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-optimizely" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-posthog.json", "title": "Flagsmith vs PostHog", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-posthog" }, { "json": "https://www.anchorterminal.com/compare/harness-fme-vs-statsig.json", "title": "Harness Feature Management \u0026 Experimentation vs Statsig", "url": "https://www.anchorterminal.com/compare/harness-fme-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/launchdarkly-vs-statsig.json", "title": "LaunchDarkly vs Statsig", "url": "https://www.anchorterminal.com/compare/launchdarkly-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-fullstory.json", "title": "Flagsmith vs Fullstory", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-fullstory" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-heap.json", "title": "Flagsmith vs Heap", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-heap" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-openpanel.json", "title": "Flagsmith vs OpenPanel", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-openpanel" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-woopra.json", "title": "Flagsmith vs Woopra", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-woopra" }, { "json": "https://www.anchorterminal.com/compare/heap-vs-statsig.json", "title": "Heap vs Statsig", "url": "https://www.anchorterminal.com/compare/heap-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-matomo.json", "title": "Flagsmith vs Matomo", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-matomo" }, { "json": "https://www.anchorterminal.com/compare/flagsmith-vs-mostly-good-metrics.json", "title": "Flagsmith vs Mostly Good Metrics", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-mostly-good-metrics" }, { "json": "https://www.anchorterminal.com/compare/growthbook-vs-statsig.json", "title": "GrowthBook vs Statsig", "url": "https://www.anchorterminal.com/compare/growthbook-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/optimizely-vs-statsig.json", "title": "Optimizely Experimentation vs Statsig", "url": "https://www.anchorterminal.com/compare/optimizely-vs-statsig" } ], "panel": null, "scores": [ { "by": 14, "edge": "statsig", "flagsmith": 65, "key": "reliability", "name": "Reliability", "statsig": 79, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 15, "edge": "statsig", "flagsmith": 67, "key": "schema", "name": "Schema \u0026 documentation", "statsig": 82, "weight": 13 }, { "by": 16, "edge": "statsig", "flagsmith": 55, "key": "ergonomics", "name": "Agent ergonomics", "statsig": 71, "weight": 13 }, { "by": 9, "edge": "statsig", "flagsmith": 65, "key": "security", "name": "Security \u0026 auth", "statsig": 74, "weight": 14 }, { "by": 0, "edge": "", "flagsmith": 40, "key": "payments", "name": "Payments \u0026 pricing", "statsig": 40, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 2, "edge": "flagsmith", "flagsmith": 83, "key": "maintenance", "name": "Maintenance \u0026 community", "statsig": 81, "weight": 7 }, { "by": 1, "edge": "flagsmith", "flagsmith": 77, "key": "transparency", "name": "Transparency \u0026 trust", "statsig": 76, "weight": 7 } ], "summary": "Statsig scores 72.4 (BB) on agent readiness against Flagsmith's 61.2 (C), and leads in 4 of 7 scored categories. Both do feature flags.", "tasks": null, "tutorials": [], "verdicts": { "flagsmith": "Flagsmith pairs a BSD-licensed core with a hosted MCP server whose 54 tools come from its OpenAPI spec and carry read and destructive hints. A public 99.95 per cent SLA and SOC 2 report back the Cloud service. The MCP server is still an early release, and fine-grained key roles need a paid Scale-Up or Enterprise plan.", "statsig": "Statsig suits agents that manage feature gates and experiments and read their results. Its MCP server has 18 default tools, OAuth, read-only access by project and role, and a confirmation on updates. Errors carry only a status and a message, no idempotency keys were found, and the privacy notice is Amplitude's and doesn't name Statsig." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/flagsmith-vs-statsig", "json": "https://www.anchorterminal.com/compare/flagsmith-vs-statsig.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/flagsmith-vs-statsig.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/flagsmith-vs-statsig.min.md" }, "markdown": "Statsig scores 72.4 (BB) on agent readiness against Flagsmith's 61.2 (C), and leads in 4 of 7 scored categories. Both do feature flags.\n\n- Flagsmith: grade C, 61.2/100, rank #620 of 1486. Markdown https://www.anchorterminal.com/tools/flagsmith.md · JSON https://www.anchorterminal.com/api/v1/tools/flagsmith.json\n- Statsig: grade BB, 72.4/100, rank #127 of 1486. Markdown https://www.anchorterminal.com/tools/statsig.md · JSON https://www.anchorterminal.com/api/v1/tools/statsig.json\n- Best product analytics and experimentation tools for AI agents: https://www.anchorterminal.com/best/product-analytics/index.md\n- All 153 product analytics comparisons: https://www.anchorterminal.com/compare/product-analytics/index.md\n\n## Which one, for what\n\n### Flagsmith (C)\n\nGood for: Feature flags and experiments for teams that want open source or self-hosting, managed by an agent through MCP.\n\nAlso in its favour:\n- Runs on your own machine\n- Open source\n\nWatch for: The MCP docs call the server an early release, and experiment tools are marked beta\n\n### Statsig (BB)\n\nGood for: An agent that creates, updates and cleans up feature gates, dynamic configs and experiments, and reads experiment results and audit history.\n\nAhead on:\n- Reliability, 79 against 65\n- Schema \u0026 documentation, 82 against 67\n- Agent ergonomics, 71 against 55\n- Security \u0026 auth, 74 against 65\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n- Free to start without a card\n\nWatch for: Console API errors carry only `status` and `message`, and the spec documents no 429 response\n\n\n## Why the edge\n\n### Agent ergonomics: Statsig +16\n\n- Flagsmith (55): 54 tools, more than 30, with no toolsets or read-only subset; enterprise tools only appear where installed (5 of 25). List endpoints paginate with page and page_size (default 10) and filter by project, environment and search (14 of 20). Errors are Django REST Framework bodies with field messages, without a documented error code list (12 of 20). Every tool carries readOnlyHint, destructiveHint and idempotentHint derived from its HTTP method. No idempotency keys for POST (14 of 20). Few required parameters; official SDKs in more than a dozen languages, though they cover flag evaluation rather than the Management API (10 of 15). 5+14+12+14+10 = 55.\n- Statsig (71): The MCP V3 server shows 18 default tools, which is 15 on the checklist. Add back 8 for the discovery layer that reaches other operations on demand, `query_fields` on experiment reads and read-only access (23 of 25). `limit` and `page` on 49 list operations with pagination metadata per the 8 October check, a cursor on the Logs Explorer query, and filters by tag, status, creator and date (17 of 20). Errors are a `status` and a `message` with no machine code, and MCP results set `isError` (11 of 20). No idempotency keys were found. Updates and `api_destructive` calls need a `confirmation` object, and operations are split into read, write and destructive lanes. We could not read the live tool annotations (10 of 20). The SDKs cover flag evaluation and event logging in many languages, not the Console API, and the `siggy` CLI on npm is version 0.0.4 from September 2024 (10 of 15).\n\n### Schema \u0026 documentation: Statsig +15\n\n- Flagsmith (67): openapi.yaml in the repository is OpenAPI 3.1 with 624 operations, and the MCP server builds its 54 tools from the operations tagged `mcp`, so every tool has a JSON Schema input (25). No llms.txt (404) and no Markdown served for agents on docs.flagsmith.com; the docs are Markdown only in the repository (0). Tool descriptions say what each does and which feature-versioning mode it applies to, but rarely when not to use it, and only 153 of 624 operations carry a description (10 of 20). 57 enums and required fields in the spec, with some free-form value fields (10 of 15). Docs carry curl examples, but only 16 operations document a 400 and 6 a 404 (7 of 15). A /api/v1 path, release-please changelog and dated release notes (15). 25+0+10+10+7+15 = 67.\n- Statsig (82): Public OpenAPI 3.0 spec for Console API version 20240601 with 209 paths and 325 operations, per the 8 October check, not re-read on 1 November, and typed MCP tools per the tool reference (25). llms.txt, llms-full.txt, a Markdown copy of each page and a public docs MCP server (10). Every operation has a summary but only 29 of 325 have a description, per the 8 October check. The MCP tool reference states each tool's purpose and when to ask the user first (11 of 20). 1,164 enums across 188 schemas, with required fields marked, per the 8 October check (12 of 15). Examples on most responses. The spec documents 401 on 156 operations, 404 on 126 and 400 on 106, and no 429, per the 8 October check (11 of 15). A dated API version sent in the `STATSIG-API-VERSION` header with a promise not to break a version, and a dated product updates page. No changelog for the API alone was found (13 of 15).\n\n### Reliability: Statsig +14\n\n- Flagsmith (65): Graded on Flagsmith Cloud with the hosted lines. Statuspage at status.flagsmith.com with components for the Edge API, Admin API, dashboard and website (20). In the 90 days from 8 August, an Admin and SDK API outage on 28 October marked critical, posted at 21:56 UTC and resolved at 22:12 with no cause given, and a minor delay in processing flag changes on 10 September. The posted span of the outage is 16 minutes and its start isn't stated, so we read it as one serious incident under an hour (15 of 30). The Management API limit of 500 requests a minute is documented (15). No 429 handling, Retry-After or idempotency guidance was found in the docs (0). A public SLA commits to 99.95 per cent monthly uptime with service credits (10). The Management API is generally available, but the MCP docs call the server an early release, so half (5 of 10). 20+15+15+0+10+5 = 65.\n- Statsig (79): Graded on the hosted service with the hosted lines. Statuspage at status.statsig.com with 14 components, among them Console API, Config Delivery API and Log Event API (20). Three incidents between 3 August and 1 November 2026, all Warehouse Native delays (export delays from 6 August resolved 8 August, delayed exposure results on 26 August and its follow-up resolved 31 August), marked minor or none per the 8 October check, and nothing posted since 31 August (20 of 30). The 8 July 2026 major, when launched gates returned false through the V2 Config Delivery API for about 4 hours 44 minutes, is outside the window. The docs give about 1,800 mutation attempts per 15 minutes per project, while the OpenAPI description gave about 100 per 10 seconds and 900 per 15 minutes per the 8 October check, and no number was found for reads (12 of 15). The docs ask for exponential backoff with jitter on 429. No `Retry-After` header and no idempotency keys were found (10 of 15). The enterprise terms give 99.95 per cent monthly availability with credits, for customers with premium support, measured on the Console user interface (7 of 10). The Console API is versioned and the MCP V3 docs carry no beta label (10).\n\n### Security \u0026 auth: Statsig +9\n\n- Flagsmith (65): OAuth for interactive MCP clients with Flagsmith as the authorisation server, Organisation API keys in the Authorization header that act as admin or with chosen RBAC roles, and OIDC trust relationships that swap a CI token for a short-lived one. Granular key roles need Scale-Up or Enterprise, so a Free key is all-powerful (25 of 30). RBAC roles can limit a key to reads, and change requests put a flag change through approval on Scale-Up and Enterprise. There is no read-only switch on the MCP server itself (14 of 20). No prompt-injection guidance; tools return names, descriptions and trait values written by people (3 of 15). Audit logs record every admin action and stream by webhook, on Scale-Up and Enterprise (11 of 15). The docs say Flagsmith has a SOC 2 Type 2 report available on request, the terms promise a yearly third-party penetration test, and SECURITY.md routes reports to support email. No security.txt, bug bounty or public advisory process was found (12 of 20). 25+14+3+11+12 = 65.\n- Statsig (74): OAuth for the MCP server with PKCE, dynamic client registration and a device code grant, issuing personal Console API keys that carry the user's role. Console keys can be created read-only or read and write, and rotated or deactivated through the API. The OAuth metadata lists no scopes, and a project Console key reaches every Console API endpoint (25 of 30). MCP scope is set per project and per role as no access, read only or read and write. Updates and destructive operations need a confirmation, and project review policies still apply (19 of 20). No guidance on prompt injection was found, though tools return names, descriptions and log data that people wrote. The docs tell users to review each change before the agent confirms (4 of 15). Audit logs are kept indefinitely with an API, and personal keys attribute changes to a user (14 of 15). SOC 2 Type II and a bug bounty programme are stated on the security page, with no public programme link and no security.txt (12 of 20).\n\n## Score by category\n\n| Category | Weight | Flagsmith | Statsig | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 65 | 79 | Statsig +14 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 67 | 82 | Statsig +15 |\n| Agent ergonomics | 13% (16.2 this run) | 55 | 71 | Statsig +16 |\n| Security \u0026 auth | 14% (17.5 this run) | 65 | 74 | Statsig +9 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 40 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 81 | Flagsmith +2 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 77 | 76 | Flagsmith +1 |\n| Negative events | ≤15 | -2 | 0 | |\n| **Total** | | **61.2 · C** | **72.4 · BB** | |\n\n## Facts side by side\n\n| Fact | Flagsmith | Statsig |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Bullet Train Ltd | Amplitude, Inc. |\n| Hosted endpoint | `https://mcp.flagsmith.com` | `https://api.statsig.com/v3/mcp` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | BSD-3-Clause | Proprietary hosted service under Statsig's self-service or enterprise terms. The SDKs and the agent skills repository on GitHub are ISC |\n| Tools exposed | 54 | 18 |\n| Read-only variant documented | yes | no |\n| llms.txt | no | yes |\n| MCP registry | not listed | `com.statsig/statsig-mcp-server` |\n| Last release | 2026-11-05 | 2026-10-28 |\n| Terms last updated | 2026-09-01 | 2025-08-04 |\n| Privacy policy last updated | 2023-10-01 | 2026-08-31 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | not found in the text | yes |\n| Popularity | 6.6k stars | 4.2M npm/wk, 894k PyPI/wk |\n| Agent reviews | none | 3.8/5 (4) |\n\n## How the scores have moved\n\n### Flagsmith\n\nNo score change since it was listed.\n\n### Statsig\n\n- +0.1 on 28 October 2026: new evidence\n\n## Verdicts\n\n**Flagsmith.** Flagsmith pairs a BSD-licensed core with a hosted MCP server whose 54 tools come from its OpenAPI spec and carry read and destructive hints. A public 99.95 per cent SLA and SOC 2 report back the Cloud service. The MCP server is still an early release, and fine-grained key roles need a paid Scale-Up or Enterprise plan.\n\n**Statsig.** Statsig suits agents that manage feature gates and experiments and read their results. Its MCP server has 18 default tools, OAuth, read-only access by project and role, and a confirmation on updates. Errors carry only a status and a message, no idempotency keys were found, and the privacy notice is Amplitude's and doesn't name Statsig.\n\n## Before you call either\n\n### Flagsmith\n\n1. Send the key as `Authorization: Api-Key \u003ckey\u003e`; the `Api-Key ` prefix is required and a bare key fails\n2. Check whether the environment uses v2 feature versioning before choosing between segment-override and version-state tools\n3. Use a key with a read-only RBAC role for analysis tasks, since a Free plan key has organisation admin rights\n4. Pace Management API calls under 500 a minute; no Retry-After guidance is documented\n5. Treat experiment results as possibly null until Flagsmith has computed them\n\n### Statsig\n\n1. Connect to https://api.statsig.com/v3/mcp. The official MCP registry entry still lists the V1 URL, which has 93 tools\n2. Call `get_context` first to learn the project, your permissions and the review settings\n3. Read the resource before `gate_update`, `experiment_update` or `dynamic_config_update`. They replace the whole resource, so resend every field you want kept\n4. Use `discover_tools` for partial edits, and fetch a fresh `operationHandle` when one expires\n5. On a 429 slow down and back off with jitter. Rejected attempts count towards the quota of about 1,800 mutations per 15 minutes\n\n## Questions\n\n### Which is better for AI agents, Flagsmith or Statsig?\n\nStatsig scores 72.4 (BB) on agent readiness against Flagsmith's 61.2 (C), and leads in 4 of 7 scored categories.\n\n### Do Flagsmith and Statsig need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call Flagsmith and Statsig without installing anything?\n\nYes. Flagsmith has a hosted endpoint at https://mcp.flagsmith.com and Statsig at https://api.statsig.com/v3/mcp.\n\n### Are Flagsmith and Statsig open source?\n\nFlagsmith is open source (BSD-3-Clause). No open-source release is listed for Statsig.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/flagsmith-vs-statsig.json, and with the fewest tokens: https://www.anchorterminal.com/compare/flagsmith-vs-statsig.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"flagsmith\", \"b\": \"statsig\"}`. From a terminal: `anchor compare flagsmith statsig`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/flagsmith.json and https://www.anchorterminal.com/api/v1/tools/statsig.json\n\n## Other comparisons with Flagsmith or Statsig\n\n- [Amplitude vs Statsig](https://www.anchorterminal.com/compare/amplitude-vs-statsig.md)\n- [Countly vs Statsig](https://www.anchorterminal.com/compare/countly-vs-statsig.md)\n- [Fullstory vs Statsig](https://www.anchorterminal.com/compare/fullstory-vs-statsig.md)\n- [Matomo vs Statsig](https://www.anchorterminal.com/compare/matomo-vs-statsig.md)\n- [Mixpanel vs Statsig](https://www.anchorterminal.com/compare/mixpanel-vs-statsig.md)\n- [Mostly Good Metrics vs Statsig](https://www.anchorterminal.com/compare/mostly-good-metrics-vs-statsig.md)\n- [OpenPanel vs Statsig](https://www.anchorterminal.com/compare/openpanel-vs-statsig.md)\n- [Pendo vs Statsig](https://www.anchorterminal.com/compare/pendo-vs-statsig.md)\n- [PostHog vs Statsig](https://www.anchorterminal.com/compare/posthog-vs-statsig.md)\n- [Statsig vs Userpilot](https://www.anchorterminal.com/compare/statsig-vs-userpilot.md)\n- [Statsig vs Woopra](https://www.anchorterminal.com/compare/statsig-vs-woopra.md)\n- [Amplitude vs Flagsmith](https://www.anchorterminal.com/compare/amplitude-vs-flagsmith.md)\n- [Countly vs Flagsmith](https://www.anchorterminal.com/compare/countly-vs-flagsmith.md)\n- [Flagsmith vs GrowthBook](https://www.anchorterminal.com/compare/flagsmith-vs-growthbook.md)\n- [Flagsmith vs Harness Feature Management \u0026 Experimentation](https://www.anchorterminal.com/compare/flagsmith-vs-harness-fme.md)\n- [Flagsmith vs LaunchDarkly](https://www.anchorterminal.com/compare/flagsmith-vs-launchdarkly.md)\n- [Flagsmith vs Mixpanel](https://www.anchorterminal.com/compare/flagsmith-vs-mixpanel.md)\n- [Flagsmith vs Optimizely Experimentation](https://www.anchorterminal.com/compare/flagsmith-vs-optimizely.md)\n- [Flagsmith vs PostHog](https://www.anchorterminal.com/compare/flagsmith-vs-posthog.md)\n- [Harness Feature Management \u0026 Experimentation vs Statsig](https://www.anchorterminal.com/compare/harness-fme-vs-statsig.md)\n- [LaunchDarkly vs Statsig](https://www.anchorterminal.com/compare/launchdarkly-vs-statsig.md)\n- [Flagsmith vs Fullstory](https://www.anchorterminal.com/compare/flagsmith-vs-fullstory.md)\n- [Flagsmith vs Heap](https://www.anchorterminal.com/compare/flagsmith-vs-heap.md)\n- [Flagsmith vs OpenPanel](https://www.anchorterminal.com/compare/flagsmith-vs-openpanel.md)\n- [Flagsmith vs Woopra](https://www.anchorterminal.com/compare/flagsmith-vs-woopra.md)\n- [Heap vs Statsig](https://www.anchorterminal.com/compare/heap-vs-statsig.md)\n- [Flagsmith vs Matomo](https://www.anchorterminal.com/compare/flagsmith-vs-matomo.md)\n- [Flagsmith vs Mostly Good Metrics](https://www.anchorterminal.com/compare/flagsmith-vs-mostly-good-metrics.md)\n- [GrowthBook vs Statsig](https://www.anchorterminal.com/compare/growthbook-vs-statsig.md)\n- [Optimizely Experimentation vs Statsig](https://www.anchorterminal.com/compare/optimizely-vs-statsig.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit Anchor Terminal and link the page or API address you took it from (https://www.anchorterminal.com/terms/#data)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-11-07", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.7", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run", "terms": "https://www.anchorterminal.com/terms/#data" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Flagsmith vs Statsig", "url": "" } ], "description": "Statsig scores 72.4 (BB) to Flagsmith's 61.2 (C) for feature flags. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Flagsmith C 61.2", "Statsig BB 72.4", "scores" ], "h1": "Flagsmith vs Statsig", "image": "https://www.anchorterminal.com/assets/og/default.png", "path": "/compare/flagsmith-vs-statsig", "published": "2026-10-01", "section": "tools", "title": "Flagsmith vs Statsig for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-11-07", "url": "https://www.anchorterminal.com/compare/flagsmith-vs-statsig" }, "tokens": { "markdown": 4500, "slim": 2580 }, "version": 1 }