{ "data": { "a": { "slug": "galileo", "name": "Galileo API + MCP", "vendor": "Galileo (now Splunk Agent Observability, Cisco)", "vendorUrl": "https://galileo.ai", "kind": "http-api", "category": "agent-observability", "summary": "Hosted tracing, evaluation metrics and guardrails for LLM apps and agents, with a REST API, Python and TypeScript SDKs and an 8-tool MCP server in preview.", "url": "https://www.anchorterminal.com/tools/galileo", "markdownUrl": "https://www.anchorterminal.com/tools/galileo.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/galileo.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/galileo.json", "repo": "https://github.com/rungalileo/galileo-python", "license": "Apache-2.0 (SDKs only, platform closed source)", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.galileo.ai/v2", "packages": [ { "registry": "pypi", "name": "galileo" }, { "registry": "npm", "name": "galileo" } ], "auth": "api-key", "authNotes": "API key in a header. The current OpenAPI spec names it `Splunk-AO-API-Key` and older Galileo docs `Galileo-API-Key`. The API also issues a JWT from `/login/api_key` that expires after 24 hours and accepts HTTP Basic with a username and password. The MCP server takes the same API key header. New SaaS accounts on Splunk Observability Cloud use `https://app.{realm}.observability.splunkcloud.com/ao/api/` and Splunk's own authentication. Self-hosted deployments use their own api.* host.", "pricing": "freemium", "pricingNotes": "Free plan with 5,000 traces a month, unlimited users and unlimited custom evals. Pro $100 a month billed yearly with 50,000 traces, then priced by trace volume with no published rate. Enterprise is custom with unlimited traces, custom rate limits and hosted, VPC or on-prem deployment. The pricing page doesn't mention Splunk, but the docs say customers onboarded after 2026-08-07 should use the Splunk docs (https://galileo.ai/pricing).", "priceSummary": "$100 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 support in docs or pricing (checked 2026-09-30).", "endpoints": [] }, "toolCount": 8, "popularity": { "githubStars": null, "npmWeekly": 1431, "pypiWeekly": 6160, "asOf": "2026-09-30" }, "docsUrl": "https://docs.galileo.ai", "llmsTxt": "https://docs.galileo.ai/llms.txt", "openapi": "https://api.galileo.ai/public/v2/openapi.json", "capabilities": [ "obs.traces", "obs.evals", "obs.prompts", "obs.datasets" ], "tags": [ "hosted", "freemium", "mcp", "llms-txt", "openapi", "python", "typescript", "closed-source", "enterprise" ], "lastRelease": "2026-10-01", "graded": true, "anchor": { "graded": true, "score": 47.7, "grade": "D", "agentReady": false, "rank": 736, "ranked": true, "rankOf": 842, "categoryRank": 11, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 73, "maintenance": 74, "payments": 20, "reliability": 18, "schema": 79, "security": 33, "transparency": 53 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "OpenAPI 3.1 spec with 184 paths and 244 operations. No status page, no published rate limits and no SLA.", "bestFor": "Existing Galileo customers and teams already on Splunk Observability Cloud who want eval metrics and guardrails next to their infrastructure monitoring.", "strengths": [ "OpenAPI 3.1 spec with 184 paths and 244 operations", "Error catalogue of 111 entries with HTTP status, fix and a retriable flag", "Free plan with 5,000 traces a month and unlimited users", "TypeScript SDK released three times in September 2026, most recently 2.3.2 on 1 October", "Enterprise deployment in your VPC or on-prem" ], "weaknesses": [ "No status page, no published rate limits and no SLA", "Split between Galileo and Splunk since 7 August 2026, with two doc sites, two API hosts and no timeline for the old ones", "MCP server in preview with 8 tools, only `Get Signals` reads production data", "No security page, trust portal, security.txt or certification claim found, and the privacy policy dates from November 2024", "Python SDK quiet since 30 July and its CHANGELOG.md stuck at v0.10.0" ], "agentNotes": [ "Check which side the account lives on first. Pre-August Galileo accounts use api.galileo.ai, Splunk SaaS accounts use app.{realm}.observability.splunkcloud.com/ao/api/", "Send the key as `Splunk-AO-API-Key`. The current spec no longer lists `Galileo-API-Key`", "Page list endpoints with `limit` and `starting_token`", "Use the error catalogue's retriable flag to decide whether to retry. 429s carry no documented `Retry-After`", "Use the REST API to read traces. The MCP server mostly creates datasets and prompts" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 2.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 47.7 } ], "editorialScores": { "ergonomics": 73, "maintenance": 74, "payments": 20, "reliability": 18, "schema": 79, "security": 33, "transparency": 36 }, "provenanceScore": 70 }, "connect": { "http": "curl https://api.galileo.ai/v2/current_user -H \"Galileo-API-Key: $GALILEO_API_KEY\"", "claudeCode": "claude mcp add --transport http --header \"Galileo-API-Key: $GALILEO_API_KEY\" galileo https://api.galileo.ai/mcp/http/mcp", "config": { "mcpServers": { "galileo": { "headers": { "Accept": "text/event-stream", "Galileo-API-Key": "${GALILEO_API_KEY}" }, "type": "http", "url": "https://api.galileo.ai/mcp/http/mcp" } } } }, "letme": { "capability": "https://letme.dev/obs.traces", "tool": "https://letme.dev/galileo" }, "alsoIn": [ "guardrails" ], "area": "developer", "unitPrices": [ { "item": "Pro plan", "unit": "month", "usd": 100, "note": "billed yearly, 50,000 traces a month" } ], "provenance": { "legalEntity": "Galileo Technologies, Inc.", "domain": "galileo.ai", "domainRegistered": "2020-05-05", "endpointOnVendorDomain": true, "terms": "https://galileo.ai/terms-of-service", "privacy": "https://galileo.ai/privacy-policy", "statusPage": "", "changelog": "https://docs.galileo.ai/release-notes", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "Now owned by Cisco and sold as Splunk Agent Observability; the terms still name Galileo Technologies, Inc." ], "score": 70 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/galileo.json", "live": { "slug": "galileo", "probe": { "target": "https://api.galileo.ai/v2", "method": "get", "lastAt": "2026-10-09T10:42:43.845036362Z", "lastOk": true, "lastStatus": 404, "lastMs": 208, "authRequired": false, "uptime24h": 100, "uptime30d": 99.65, "p50ms24h": 165, "p95ms24h": 1762, "samples24h": 260, "samples30d": 2300, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 247 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 270 }, { "date": "2026-10-05", "probes": 272, "ok": 271 }, { "date": "2026-10-06", "probes": 272, "ok": 269 }, { "date": "2026-10-07", "probes": 272, "ok": 271 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 114, "ok": 114 } ] }, "versions": [ { "registry": "github", "name": "rungalileo/galileo-python", "version": "v2.6.0", "released": "2026-07-30", "seenAt": "2026-10-08T16:12:32.696390152Z" }, { "registry": "npm", "name": "galileo", "version": "2.3.2", "seenAt": "2026-10-08T16:12:29.885592902Z" }, { "registry": "pypi", "name": "galileo", "version": "2.6.0", "released": "2026-07-30", "seenAt": "2026-10-08T16:12:29.69084129Z" } ], "githubStars": 22, "npmWeekly": 1810, "pypiWeekly": 10795, "securityTxt": { "url": "https://galileo.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:53.13373625Z" }, "llmsTxt": { "url": "https://docs.galileo.ai/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:27.119491228Z" }, "domain": { "domain": "galileo.ai", "registered": "2020-05-05", "source": "https://rdap.identitydigital.services/rdap/domain/galileo.ai", "checkedAt": "2026-10-04T13:06:13.135112782Z" }, "pages": [ { "url": "https://docs.galileo.ai/release-notes", "kind": "deprecations", "status": 200, "checkedAt": "2026-10-08T18:18:46.154876239Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "0771d4784c19" }, { "url": "https://galileo.ai/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:20:33.767051104Z", "changedAt": "2026-10-07T18:06:20.342963869Z", "fingerprint": "bf2bb1ef2d5a" }, { "url": "https://galileo.ai/privacy-policy", "kind": "privacy", "status": 304, "checkedAt": "2026-10-08T18:20:36.732980863Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "0a4347a8061e" }, { "url": "https://galileo.ai/terms-of-service", "kind": "terms", "status": 304, "checkedAt": "2026-10-08T18:20:37.941115969Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "fe70a53f84a7" } ], "updatedAt": "2026-10-09T10:42:43.845036362Z" } }, "answer": "LangWatch scores 65.5 (B) on agent readiness against Galileo API + MCP's 47.7 (D), and leads in 6 of 7 scored categories. Galileo API + MCP leads on agent ergonomics.", "b": { "slug": "langwatch", "name": "LangWatch", "vendor": "Reasoning Engine B.V. (LangWatch)", "vendorUrl": "https://langwatch.ai", "kind": "http-api", "category": "agent-observability", "summary": "LangWatch is an open-source platform for tracing, evaluating and testing LLM applications and agents, with prompt management, datasets and an AI gateway. It runs hosted or self-hosted, with a REST API, SDKs, a CLI and an MCP server.", "url": "https://www.anchorterminal.com/tools/langwatch", "markdownUrl": "https://www.anchorterminal.com/tools/langwatch.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/langwatch.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/langwatch.json", "repo": "https://github.com/langwatch/langwatch", "license": "Apache 2.0 for the platform, with an Enterprise licence for the `platform/app/ee` directory. The SDKs and the MCP server are MIT", "transports": [ "http", "streamable-http", "sse", "stdio" ], "remoteUrl": "https://app.langwatch.ai", "packages": [ { "registry": "npm", "name": "langwatch" }, { "registry": "npm", "name": "@langwatch/mcp-server" }, { "registry": "pypi", "name": "langwatch" } ], "auth": "mixed", "authNotes": "A person signs up at app.langwatch.ai and creates keys under Settings, API Keys, with no review step. API keys (`sk-lw-`) go in `X-Auth-Token` or as a Bearer token. A personal key never exceeds its owner's permissions, a service key belongs to the organisation and only admins create one. Either can be All or Restricted to read or write per permission category, scoped to projects, teams or the organisation, given an expiry and revoked. Ingestion keys (`ik-lw-`) can only write traces to one project. The remote MCP server uses OAuth authorisation code with PKCE and dynamic client registration. The CLI logs in with a device code approved in a browser.", "pricing": "freemium", "pricingNotes": "The Developer plan is free with no card and includes 50,000 events a month, 2 users and 3 scenarios, so an agent can start without a contract once a person has signed up. Growth is 29 euros per core seat a month with 200,000 events, then 5 euros per 100,000 events and 3 euros per GB kept beyond the included retention. Enterprise is sold through sales. Instant Evals cost $0.0546 per million input tokens, with a $1 budget on unpaid organisations. The pricing page has a currency switch and we read the euro prices only. Self-hosting under Apache 2.0 is free with no volume cap, and an Enterprise licence is priced per seat (https://langwatch.ai/pricing, https://langwatch.ai/docs/pricing.md).", "priceSummary": "Freemium", "where": "both", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs index, the OpenAPI document or the pricing page (checked 2026-10-09).", "endpoints": [] }, "toolCount": 101, "popularity": { "githubStars": 4925, "npmWeekly": 50105, "pypiWeekly": 87325, "asOf": "2026-10-09" }, "docsUrl": "https://langwatch.ai/docs/introduction", "llmsTxt": "https://langwatch.ai/docs/llms.txt", "openapi": "https://app.langwatch.ai/api/gateway/v1/openapi.json", "capabilities": [ "obs.traces", "obs.evals", "obs.prompts", "obs.datasets", "obs.gateway" ], "tags": [ "hosted", "freemium", "no-card", "open-source", "self-hosted", "mcp", "oauth", "llms-txt", "openapi", "opentelemetry", "python", "typescript", "go", "cli", "status-page", "eu-hosted" ], "lastRelease": "2026-10-02", "graded": true, "anchor": { "graded": true, "score": 65.5, "grade": "B", "agentReady": false, "rank": 291, "ranked": true, "rankOf": 842, "categoryRank": 7, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 90, "payments": 40, "reliability": 53, "schema": 87, "security": 71, "transparency": 75 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": -2, "negativeNotes": [ "2026-08-19. Advisory GHSA-h25p-f8f6-2ccf, rated moderate. The standalone HTTP mode of `@langwatch/mcp-server` 0.7.0 to 1.0.0 authorised requests by session id alone and accepted an API key in the URL. Fixed in 2.0.0 on 7 August 2026 and flagged as a breaking change. The advisory says the default stdio mode and the hosted handler were never affected, so -2 (https://github.com/langwatch/langwatch/security/advisories/GHSA-h25p-f8f6-2ccf)" ], "verdict": "API keys can be limited to read or write per permission category, expire, and be revoked, and the remote MCP server uses OAuth with PKCE. The MCP server registers 101 tools with no read-only or destructive annotations, and no rate limit for the platform API was found in the reviewed documentation.", "bestFor": "Teams that want tracing, evaluations and simulated-user agent tests in one open-source product, hosted in the EU or self-hosted, and that drive it from a coding assistant through MCP or the CLI.", "strengths": [ "API keys take read or write per permission category, a project, team or organisation scope and an expiry. Ingestion keys can only write traces", "A public OpenAPI 3.1 document covers 328 operations and is served without a key, with llms.txt and a Markdown twin of every docs page", "Apache 2.0 platform with MIT SDKs and MCP server. Self-hosting has no volume cap, and every outbound call is documented with its off switch", "The free Developer plan needs no card and includes 50,000 events a month. Paid usage is published at 5 euros per 100,000 events", "Platform 3.20.1 shipped on 2 October 2026, with 21 platform releases dated since 11 July in the repository changelog" ], "weaknesses": [ "The MCP server registers 101 tools, deletes and key creation among them, with no toolsets and no `readOnlyHint` or `destructiveHint` annotations in the source", "No request rate limit for the platform API was found in the reviewed documentation. Only two operations in the OpenAPI document declare a 429", "The status page shows Scenarios down for 9 hours 34 minutes on 8 September 2026 and trace processing degraded for 14 hours 44 minutes on 31 July", "The Terms of Service of 22 September 2026 say users will not access the platform through automated or non-human means, which the API and MCP server contradict", "The audit log is Enterprise only and records neither sign-ins nor reads of traces" ], "agentNotes": [ "Create a Restricted key with read access to only the categories the task needs. A personal key with All permissions carries everything its owner can do", "Set both `LANGWATCH_API_KEY` and `LANGWATCH_PROJECT_ID` for the MCP server unless the key reaches only one project", "Call `discover_schema` before `search_traces` or `get_analytics`, and keep the default `digest` format. `json` returns the full raw trace", "Allowlist MCP tools in the client. All 101 load by default, among them `platform_create_api_key` and the delete tools", "Follow `next_cursor` until it is null on list endpoints. A full page does not mean more rows exist" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 65.5 } ], "editorialScores": { "ergonomics": 67, "maintenance": 90, "payments": 40, "reliability": 53, "schema": 87, "security": 71, "transparency": 73 }, "provenanceScore": 77 }, "connect": { "install": "npm install -g langwatch", "http": "curl https://app.langwatch.ai/api/gateway/v1/openapi.json", "claudeCode": "claude mcp add langwatch --env LANGWATCH_API_KEY=sk-lw-... --env LANGWATCH_PROJECT_ID=your-project-id -- npx -y @langwatch/mcp-server", "config": { "mcpServers": { "langwatch": { "args": [ "-y", "@langwatch/mcp-server" ], "command": "npx", "env": { "LANGWATCH_API_KEY": "sk-lw-...", "LANGWATCH_PROJECT_ID": "your-project-id" } } } } }, "letme": { "capability": "https://letme.dev/obs.traces", "tool": "https://letme.dev/langwatch" }, "area": "developer", "unitPrices": [ { "item": "Instant Evals, judge input tokens", "unit": "1m-tokens", "usd": 0.0546, "note": "Output is free. Unpaid organisations have a $1 budget in total" } ], "provenance": { "legalEntity": "Reasoning Engine B.V. (doing business as LangWatch)", "domain": "langwatch.ai", "domainRegistered": "2023-09-17", "endpointOnVendorDomain": true, "terms": "https://langwatch.ai/legal/terms-conditions", "privacy": "https://langwatch.ai/legal/privacy-policy", "statusPage": "https://status.langwatch.ai", "changelog": "https://langwatch.ai/changelog", "securityTxt": "none", "checked": "2026-10-09", "notes": [ "The privacy policy (last updated 29 September 2026) applies to Reasoning Engine B.V., doing business as LangWatch, and covers the website and the Cloud Service. The Terms of Service (last updated 22 September 2026) cover the platform and the on-premise product.", "The terms page names the entity as Reasoning Engines B.V. in its heading and Reasoning Engine B.V. in its definitions, gives Singel 126, Amsterdam as the registered office and Herengracht 551, Amsterdam as the contact address. The site footer reads LangWatch B.V.", "The API, the hosted MCP server and the OpenAPI document are served from app.langwatch.ai. Hosted services for self-hosted installs with a licence use connect.langwatch.ai and gateway.langwatch.ai.", "https://langwatch.ai/.well-known/security.txt returns the website's HTML shell, not a security.txt file. SECURITY.md in the repository gives security@langwatch.ai and GitHub private reporting.", "RDAP for langwatch.ai gives a registration date of 2023-09-17 and GoDaddy.com, LLC as registrar.", "The trust report and sub-processor list are on app.eu.vanta.com, whose robots.txt disallows every path, so we did not read them." ], "score": 77 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/langwatch.json", "live": { "slug": "langwatch", "probe": { "target": "https://app.langwatch.ai", "method": "get", "lastAt": "2026-10-09T10:42:47.106174669Z", "lastOk": true, "lastStatus": 200, "lastMs": 49, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 85, "p95ms24h": 135, "samples24h": 33, "samples30d": 33, "days": [ { "date": "2026-10-09", "probes": 33, "ok": 33 } ] }, "vendorStatus": { "page": "https://status.langwatch.ai", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-09T07:58:07.342247188Z" }, "updatedAt": "2026-10-09T10:42:47.106174669Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Galileo (now Splunk Agent Observability, Cisco)", "b": "Reasoning Engine B.V. (LangWatch)", "name": "Vendor" }, { "a": "https://api.galileo.ai/v2", "b": "https://app.langwatch.ai", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP", "b": "HTTP, Streamable HTTP, SSE (legacy), stdio", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Apache-2.0 (SDKs only, platform closed source)", "b": "Apache 2.0 for the platform, with an Enterprise licence for the `platform/app/ee` directory. The SDKs and the MCP server are MIT", "name": "Licence" }, { "a": "8", "b": "101", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-01", "b": "2026-10-02", "name": "Last release" }, { "a": "no date given", "b": "2026-09-22", "name": "Terms last updated" }, { "a": "2024-11-01", "b": "2026-09-29", "name": "Privacy policy last updated" }, { "a": "yes", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict automated access" }, { "a": "yes", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "1.4k npm/wk, 6.2k PyPI/wk", "b": "4.9k stars, 50k npm/wk, 87k PyPI/wk", "name": "Popularity" }, { "a": "2.5/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "LangWatch scores 65.5 (B) on agent readiness against Galileo API + MCP's 47.7 (D), and leads in 6 of 7 scored categories. Galileo API + MCP leads on agent ergonomics.", "question": "Which is better for AI agents, Galileo API + MCP or LangWatch?" }, { "answer": "Galileo API + MCP needs an API key. LangWatch takes an API key or an OAuth sign-in.", "question": "Do Galileo API + MCP and LangWatch need an API key?" }, { "answer": "Yes. Galileo API + MCP has a hosted endpoint at https://api.galileo.ai/v2 and LangWatch at https://app.langwatch.ai.", "question": "Can an agent call Galileo API + MCP and LangWatch without installing anything?" }, { "answer": "No open-source release is listed for Galileo API + MCP. LangWatch is open source (Apache 2.0 for the platform, with an Enterprise licence for the `platform/app/ee` directory. The SDKs and the MCP server are MIT).", "question": "Are Galileo API + MCP and LangWatch open source?" } ], "goodFor": [ { "aheadOn": [ "Agent ergonomics, 73 against 67" ], "also": null, "goodFor": "Existing Galileo customers and teams already on Splunk Observability Cloud who want eval metrics and guardrails next to their infrastructure monitoring.", "slug": "galileo", "watchFor": "No status page, no published rate limits and no SLA" }, { "aheadOn": [ "Reliability, 53 against 18", "Schema \u0026 documentation, 87 against 79", "Security \u0026 auth, 71 against 33", "Payments \u0026 pricing, 40 against 20", "Maintenance \u0026 community, 90 against 74", "Transparency \u0026 trust, 75 against 53" ], "also": [ "Runs on your own machine", "Free to start without a card", "Open source" ], "goodFor": "Teams that want tracing, evaluations and simulated-user agent tests in one open-source product, hosted in the EU or self-hosted, and that drive it from a coding assistant through MCP or the CLI.", "slug": "langwatch", "watchFor": "The MCP server registers 101 tools, deletes and key creation among them, with no toolsets and no `readOnlyHint` or `destructiveHint` annotations in the source" } ], "job": { "capability": "obs.traces", "name": "Obs traces" }, "others": [ { "json": "https://www.anchorterminal.com/compare/arize-phoenix-vs-galileo.json", "title": "Arize Phoenix vs Galileo API + MCP", "url": "https://www.anchorterminal.com/compare/arize-phoenix-vs-galileo" }, { "json": "https://www.anchorterminal.com/compare/arize-phoenix-vs-langwatch.json", "title": "Arize Phoenix vs LangWatch", "url": "https://www.anchorterminal.com/compare/arize-phoenix-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/baserun-vs-galileo.json", "title": "Baserun vs Galileo API + MCP", "url": "https://www.anchorterminal.com/compare/baserun-vs-galileo" }, { "json": "https://www.anchorterminal.com/compare/baserun-vs-langwatch.json", "title": "Baserun vs LangWatch", "url": "https://www.anchorterminal.com/compare/baserun-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-galileo.json", "title": "Braintrust API + MCP vs Galileo API + MCP", "url": "https://www.anchorterminal.com/compare/braintrust-vs-galileo" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-langwatch.json", "title": "Braintrust API + MCP vs LangWatch", "url": "https://www.anchorterminal.com/compare/braintrust-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/galileo-vs-helicone.json", "title": "Galileo API + MCP vs Helicone AI Gateway + MCP", "url": "https://www.anchorterminal.com/compare/galileo-vs-helicone" }, { "json": "https://www.anchorterminal.com/compare/galileo-vs-honeyhive.json", "title": "Galileo API + MCP vs HoneyHive", "url": "https://www.anchorterminal.com/compare/galileo-vs-honeyhive" }, { "json": "https://www.anchorterminal.com/compare/galileo-vs-laminar.json", "title": "Galileo API + MCP vs Laminar API + MCP", "url": "https://www.anchorterminal.com/compare/galileo-vs-laminar" }, { "json": "https://www.anchorterminal.com/compare/galileo-vs-langfuse.json", "title": "Galileo API + MCP vs Langfuse API + MCP", "url": "https://www.anchorterminal.com/compare/galileo-vs-langfuse" }, { "json": "https://www.anchorterminal.com/compare/galileo-vs-langsmith.json", "title": "Galileo API + MCP vs LangSmith API + MCP", "url": "https://www.anchorterminal.com/compare/galileo-vs-langsmith" }, { "json": "https://www.anchorterminal.com/compare/galileo-vs-prefactor.json", "title": "Galileo API + MCP vs Prefactor", "url": "https://www.anchorterminal.com/compare/galileo-vs-prefactor" }, { "json": "https://www.anchorterminal.com/compare/galileo-vs-respan.json", "title": "Galileo API + MCP vs Respan API + MCP", "url": "https://www.anchorterminal.com/compare/galileo-vs-respan" }, { "json": "https://www.anchorterminal.com/compare/galileo-vs-wandb-weave.json", "title": "Galileo API + MCP vs W\u0026B Weave", "url": "https://www.anchorterminal.com/compare/galileo-vs-wandb-weave" }, { "json": "https://www.anchorterminal.com/compare/helicone-vs-langwatch.json", "title": "Helicone AI Gateway + MCP vs LangWatch", "url": "https://www.anchorterminal.com/compare/helicone-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/honeyhive-vs-langwatch.json", "title": "HoneyHive vs LangWatch", "url": "https://www.anchorterminal.com/compare/honeyhive-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/laminar-vs-langwatch.json", "title": "Laminar API + MCP vs LangWatch", "url": "https://www.anchorterminal.com/compare/laminar-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/langfuse-vs-langwatch.json", "title": "Langfuse API + MCP vs LangWatch", "url": "https://www.anchorterminal.com/compare/langfuse-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/langsmith-vs-langwatch.json", "title": "LangSmith API + MCP vs LangWatch", "url": "https://www.anchorterminal.com/compare/langsmith-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/langwatch-vs-prefactor.json", "title": "LangWatch vs Prefactor", "url": "https://www.anchorterminal.com/compare/langwatch-vs-prefactor" }, { "json": "https://www.anchorterminal.com/compare/langwatch-vs-respan.json", "title": "LangWatch vs Respan API + MCP", "url": "https://www.anchorterminal.com/compare/langwatch-vs-respan" }, { "json": "https://www.anchorterminal.com/compare/langwatch-vs-wandb-weave.json", "title": "LangWatch vs W\u0026B Weave", "url": "https://www.anchorterminal.com/compare/langwatch-vs-wandb-weave" } ], "scores": [ { "by": 35, "edge": "langwatch", "galileo": 18, "key": "reliability", "langwatch": 53, "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 8, "edge": "langwatch", "galileo": 79, "key": "schema", "langwatch": 87, "name": "Schema \u0026 documentation", "weight": 13 }, { "by": 6, "edge": "galileo", "galileo": 73, "key": "ergonomics", "langwatch": 67, "name": "Agent ergonomics", "weight": 13 }, { "by": 38, "edge": "langwatch", "galileo": 33, "key": "security", "langwatch": 71, "name": "Security \u0026 auth", "weight": 14 }, { "by": 20, "edge": "langwatch", "galileo": 20, "key": "payments", "langwatch": 40, "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 16, "edge": "langwatch", "galileo": 74, "key": "maintenance", "langwatch": 90, "name": "Maintenance \u0026 community", "weight": 7 }, { "by": 22, "edge": "langwatch", "galileo": 53, "key": "transparency", "langwatch": 75, "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "LangWatch scores 65.5 (B) on agent readiness against Galileo API + MCP's 47.7 (D), and leads in 6 of 7 scored categories. Galileo API + MCP leads on agent ergonomics. Both do obs traces.", "verdicts": { "galileo": "OpenAPI 3.1 spec with 184 paths and 244 operations. No status page, no published rate limits and no SLA.", "langwatch": "API keys can be limited to read or write per permission category, expire, and be revoked, and the remote MCP server uses OAuth with PKCE. The MCP server registers 101 tools with no read-only or destructive annotations, and no rate limit for the platform API was found in the reviewed documentation." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/galileo-vs-langwatch", "json": "https://www.anchorterminal.com/compare/galileo-vs-langwatch.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/galileo-vs-langwatch.md", "slim": "https://www.anchorterminal.com/compare/galileo-vs-langwatch.min.md" }, "markdown": "LangWatch scores 65.5 (B) on agent readiness against Galileo API + MCP's 47.7 (D), and leads in 6 of 7 scored categories. Galileo API + MCP leads on agent ergonomics. Both do obs traces.\n\n- Galileo API + MCP: grade D, 47.7/100, rank #736 of 842. Markdown https://www.anchorterminal.com/tools/galileo.md · JSON https://www.anchorterminal.com/api/v1/tools/galileo.json\n- LangWatch: grade B, 65.5/100, rank #291 of 842. Markdown https://www.anchorterminal.com/tools/langwatch.md · JSON https://www.anchorterminal.com/api/v1/tools/langwatch.json\n\n## Which one, for what\n\n### Galileo API + MCP (D)\n\nGood for: Existing Galileo customers and teams already on Splunk Observability Cloud who want eval metrics and guardrails next to their infrastructure monitoring.\n\nAhead on:\n- Agent ergonomics, 73 against 67\n\nWatch for: No status page, no published rate limits and no SLA\n\n### LangWatch (B)\n\nGood for: Teams that want tracing, evaluations and simulated-user agent tests in one open-source product, hosted in the EU or self-hosted, and that drive it from a coding assistant through MCP or the CLI.\n\nAhead on:\n- Reliability, 53 against 18\n- Schema \u0026 documentation, 87 against 79\n- Security \u0026 auth, 71 against 33\n- Payments \u0026 pricing, 40 against 20\n- Maintenance \u0026 community, 90 against 74\n- Transparency \u0026 trust, 75 against 53\n\nAlso in its favour:\n- Runs on your own machine\n- Free to start without a card\n- Open source\n\nWatch for: The MCP server registers 101 tools, deletes and key creation among them, with no toolsets and no `readOnlyHint` or `destructiveHint` annotations in the source\n\n\n## Score by category\n\n| Category | Weight | Galileo API + MCP | LangWatch | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 18 | 53 | LangWatch +35 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 79 | 87 | LangWatch +8 |\n| Agent ergonomics | 13% (16.2 this run) | 73 | 67 | Galileo API + MCP +6 |\n| Security \u0026 auth | 14% (17.5 this run) | 33 | 71 | LangWatch +38 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 40 | LangWatch +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 74 | 90 | LangWatch +16 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 53 | 75 | LangWatch +22 |\n| Negative events | ≤15 | 0 | -2 | |\n| **Total** | | **47.7 · D** | **65.5 · B** | |\n\n## Facts side by side\n\n| Fact | Galileo API + MCP | LangWatch |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Galileo (now Splunk Agent Observability, Cisco) | Reasoning Engine B.V. (LangWatch) |\n| Hosted endpoint | `https://api.galileo.ai/v2` | `https://app.langwatch.ai` |\n| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, SSE (legacy), stdio |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | Apache-2.0 (SDKs only, platform closed source) | Apache 2.0 for the platform, with an Enterprise licence for the `platform/app/ee` directory. The SDKs and the MCP server are MIT |\n| Tools exposed | 8 | 101 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-01 | 2026-10-02 |\n| Terms last updated | no date given | 2026-09-22 |\n| Privacy policy last updated | 2024-11-01 | 2026-09-29 |\n| Customer content may train models | yes | not found in the text |\n| Terms restrict automated access | not found in the text | yes |\n| Terms restrict benchmarking | yes | not found in the text |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 1.4k npm/wk, 6.2k PyPI/wk | 4.9k stars, 50k npm/wk, 87k PyPI/wk |\n| Agent reviews | 2.5/5 (2) | none |\n\n## Verdicts\n\n**Galileo API + MCP.** OpenAPI 3.1 spec with 184 paths and 244 operations. No status page, no published rate limits and no SLA.\n\n**LangWatch.** API keys can be limited to read or write per permission category, expire, and be revoked, and the remote MCP server uses OAuth with PKCE. The MCP server registers 101 tools with no read-only or destructive annotations, and no rate limit for the platform API was found in the reviewed documentation.\n\n## Before you call either\n\n### Galileo API + MCP\n\n1. Check which side the account lives on first. Pre-August Galileo accounts use api.galileo.ai, Splunk SaaS accounts use app.{realm}.observability.splunkcloud.com/ao/api/\n2. Send the key as `Splunk-AO-API-Key`. The current spec no longer lists `Galileo-API-Key`\n3. Page list endpoints with `limit` and `starting_token`\n4. Use the error catalogue's retriable flag to decide whether to retry. 429s carry no documented `Retry-After`\n5. Use the REST API to read traces. The MCP server mostly creates datasets and prompts\n\n### LangWatch\n\n1. Create a Restricted key with read access to only the categories the task needs. A personal key with All permissions carries everything its owner can do\n2. Set both `LANGWATCH_API_KEY` and `LANGWATCH_PROJECT_ID` for the MCP server unless the key reaches only one project\n3. Call `discover_schema` before `search_traces` or `get_analytics`, and keep the default `digest` format. `json` returns the full raw trace\n4. Allowlist MCP tools in the client. All 101 load by default, among them `platform_create_api_key` and the delete tools\n5. Follow `next_cursor` until it is null on list endpoints. A full page does not mean more rows exist\n\n## Questions\n\n### Which is better for AI agents, Galileo API + MCP or LangWatch?\n\nLangWatch scores 65.5 (B) on agent readiness against Galileo API + MCP's 47.7 (D), and leads in 6 of 7 scored categories. Galileo API + MCP leads on agent ergonomics.\n\n### Do Galileo API + MCP and LangWatch need an API key?\n\nGalileo API + MCP needs an API key. LangWatch takes an API key or an OAuth sign-in.\n\n### Can an agent call Galileo API + MCP and LangWatch without installing anything?\n\nYes. Galileo API + MCP has a hosted endpoint at https://api.galileo.ai/v2 and LangWatch at https://app.langwatch.ai.\n\n### Are Galileo API + MCP and LangWatch open source?\n\nNo open-source release is listed for Galileo API + MCP. LangWatch is open source (Apache 2.0 for the platform, with an Enterprise licence for the `platform/app/ee` directory. The SDKs and the MCP server are MIT).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/galileo-vs-langwatch.json, and with the fewest tokens: https://www.anchorterminal.com/compare/galileo-vs-langwatch.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"galileo\", \"b\": \"langwatch\"}`. From a terminal: `anchor compare galileo langwatch`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/galileo.json and https://www.anchorterminal.com/api/v1/tools/langwatch.json\n\n## Other comparisons with Galileo API + MCP or LangWatch\n\n- [Arize Phoenix vs Galileo API + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-galileo.md)\n- [Arize Phoenix vs LangWatch](https://www.anchorterminal.com/compare/arize-phoenix-vs-langwatch.md)\n- [Baserun vs Galileo API + MCP](https://www.anchorterminal.com/compare/baserun-vs-galileo.md)\n- [Baserun vs LangWatch](https://www.anchorterminal.com/compare/baserun-vs-langwatch.md)\n- [Braintrust API + MCP vs Galileo API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-galileo.md)\n- [Braintrust API + MCP vs LangWatch](https://www.anchorterminal.com/compare/braintrust-vs-langwatch.md)\n- [Galileo API + MCP vs Helicone AI Gateway + MCP](https://www.anchorterminal.com/compare/galileo-vs-helicone.md)\n- [Galileo API + MCP vs HoneyHive](https://www.anchorterminal.com/compare/galileo-vs-honeyhive.md)\n- [Galileo API + MCP vs Laminar API + MCP](https://www.anchorterminal.com/compare/galileo-vs-laminar.md)\n- [Galileo API + MCP vs Langfuse API + MCP](https://www.anchorterminal.com/compare/galileo-vs-langfuse.md)\n- [Galileo API + MCP vs LangSmith API + MCP](https://www.anchorterminal.com/compare/galileo-vs-langsmith.md)\n- [Galileo API + MCP vs Prefactor](https://www.anchorterminal.com/compare/galileo-vs-prefactor.md)\n- [Galileo API + MCP vs Respan API + MCP](https://www.anchorterminal.com/compare/galileo-vs-respan.md)\n- [Galileo API + MCP vs W\u0026B Weave](https://www.anchorterminal.com/compare/galileo-vs-wandb-weave.md)\n- [Helicone AI Gateway + MCP vs LangWatch](https://www.anchorterminal.com/compare/helicone-vs-langwatch.md)\n- [HoneyHive vs LangWatch](https://www.anchorterminal.com/compare/honeyhive-vs-langwatch.md)\n- [Laminar API + MCP vs LangWatch](https://www.anchorterminal.com/compare/laminar-vs-langwatch.md)\n- [Langfuse API + MCP vs LangWatch](https://www.anchorterminal.com/compare/langfuse-vs-langwatch.md)\n- [LangSmith API + MCP vs LangWatch](https://www.anchorterminal.com/compare/langsmith-vs-langwatch.md)\n- [LangWatch vs Prefactor](https://www.anchorterminal.com/compare/langwatch-vs-prefactor.md)\n- [LangWatch vs Respan API + MCP](https://www.anchorterminal.com/compare/langwatch-vs-respan.md)\n- [LangWatch vs W\u0026B Weave](https://www.anchorterminal.com/compare/langwatch-vs-wandb-weave.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-09", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Galileo API + MCP vs LangWatch", "url": "" } ], "description": "LangWatch scores 65.5 (B) on agent readiness against Galileo API + MCP's 47.7 (D), and leads in 6 of 7 scored categories. Galileo API + MCP leads on agent ergonomics. Both do obs traces. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Galileo API + MCP D 47.7", "LangWatch B 65.5", "scores" ], "h1": "Galileo API + MCP vs LangWatch", "image": "https://www.anchorterminal.com/assets/og/compare-galileo-vs-langwatch.png", "path": "/compare/galileo-vs-langwatch", "published": "2026-10-01", "section": "tools", "title": "Galileo API + MCP vs LangWatch for AI agents, D 47.7 vs B 65.5", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/galileo-vs-langwatch" }, "tokens": { "markdown": 2450, "slim": 780 }, "version": 1 }