{ "data": { "a": { "slug": "memory-reference-server", "name": "Memory (MCP reference server)", "vendor": "MCP project (reference servers)", "vendorUrl": "https://modelcontextprotocol.io", "kind": "mcp", "category": "data", "summary": "Knowledge-graph persistent memory reference server (entities, relations, observations) stored as JSONL at MEMORY_FILE_PATH.", "url": "https://www.anchorterminal.com/tools/memory-reference-server", "markdownUrl": "https://www.anchorterminal.com/tools/memory-reference-server.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/memory-reference-server.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/memory-reference-server.json", "repo": "https://github.com/modelcontextprotocol/servers", "license": "MIT and Apache-2.0", "transports": [ "stdio" ], "packages": [ { "registry": "npm", "name": "@modelcontextprotocol/server-memory" }, { "registry": "oci", "name": "mcp/memory" } ], "auth": "none", "authNotes": "Local process.", "pricing": "free", "pricingNotes": "Open source.", "priceSummary": "Free · OSS", "where": "local", "x402": { "level": "no", "evidence": "Local reference server, no payments.", "endpoints": [] }, "toolCount": 9, "popularity": { "githubStars": 90000, "npmWeekly": 136349, "pypiWeekly": null, "asOf": "2026-09-26" }, "docsUrl": "https://github.com/modelcontextprotocol/servers/blob/main/src/memory/README.md", "capabilities": [ "memory.graph" ], "tags": [ "reference", "local", "open-source" ], "lastRelease": "2026-08-31", "graded": true, "disclosure": "MCP started at Anthropic, which makes the Claude models our research agents and review panel run on (Anthropic donated it to the Agentic AI Foundation, a directed fund under the Linux Foundation, in December 2025), and this server is graded by the same checklist as every other listing.", "anchor": { "graded": true, "score": 54.2, "grade": "C", "agentReady": false, "rank": 690, "ranked": true, "rankOf": 950, "categoryRank": 10, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 43, "payments": 60, "reliability": 52, "schema": 60, "security": 32, "transparency": 72 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Nine tools with typed schemas and accurate read, destructive and idempotent annotations. No pagination or limits. `read_graph` returns everything and `search_nodes` every match.", "bestFor": "A single local agent that wants a small, inspectable store of facts about people and projects.", "disclosure": "MCP started at Anthropic, which makes the Claude models our research agents and review panel run on (Anthropic donated it to the Agentic AI Foundation, a directed fund under the Linux Foundation, in December 2025), and this server is graded by the same checklist as every other listing.", "strengths": [ "Nine tools with typed schemas and accurate read, destructive and idempotent annotations", "Plain JSONL storage at a path you choose, easy to back up, diff and edit by hand", "Writes are atomic since 2026.8.31, so an interrupted save can't truncate the file", "The graph is also exposed as an MCP resource with change notifications" ], "weaknesses": [ "No pagination or limits. `read_graph` returns everything and `search_nodes` every match", "The published version can lose one of two writes made in the same turn. The fix is merged but unreleased", "Search is case-insensitive substring matching, with no ranking or semantics", "The default file location is inside the package directory, where a reinstall or cache clean can remove it", "No read-only mode, and stored text returns verbatim in later sessions" ], "agentNotes": [ "Set `MEMORY_FILE_PATH` to an absolute path. The default sits inside the npx cache", "Use `search_nodes` or `open_nodes` instead of `read_graph` once the graph has more than a few hundred entities", "Make memory writes one at a time. Parallel calls in one turn can overwrite each other in 2026.8.31", "Create both entities before `create_relations`. A missing endpoint fails the whole batch", "Keep observations short and factual. They come back verbatim in every later read" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 2, "avgRating": 2.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 54.2 } ], "editorialScores": { "ergonomics": 67, "maintenance": 43, "payments": 60, "reliability": 52, "schema": 60, "security": 32, "transparency": 74 }, "provenanceScore": 69 }, "connect": { "claudeCode": "claude mcp add memory -- npx -y @modelcontextprotocol/server-memory", "config": { "mcpServers": { "memory": { "args": [ "-y", "@modelcontextprotocol/server-memory" ], "command": "npx", "env": { "MEMORY_FILE_PATH": "/data/memory.jsonl" } } } } }, "letme": { "capability": "https://letme.dev/memory.graph", "tool": "https://letme.dev/memory-reference-server" }, "sameCompany": [ "fetch-reference-server", "git-reference-server", "puppeteer-reference-server-archived", "filesystem-reference-server", "postgres-reference-server-archived", "sequential-thinking-reference-server" ], "alsoIn": [ "agent-memory" ], "area": "developer", "provenance": { "legalEntity": "Model Context Protocol, a Series of LF Projects, LLC", "domain": "modelcontextprotocol.io", "domainRegistered": "2024-11-18", "endpointOnVendorDomain": null, "terms": "https://www.lfprojects.org/policies/terms-of-use/", "privacy": "https://www.lfprojects.org/policies/privacy-policy/", "statusPage": "", "changelog": "https://github.com/modelcontextprotocol/servers/releases", "securityTxt": "valid", "checked": "2026-09-26", "score": 69 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/memory-reference-server.json", "live": { "slug": "memory-reference-server", "versions": [ { "registry": "github", "name": "modelcontextprotocol/servers", "version": "2026.8.31", "released": "2026-08-31", "seenAt": "2026-10-09T17:04:49.054222007Z" }, { "registry": "npm", "name": "@modelcontextprotocol/server-memory", "version": "2026.8.31", "seenAt": "2026-10-09T17:04:48.197381119Z" } ], "githubStars": 91097, "npmWeekly": 138738, "securityTxt": { "url": "https://modelcontextprotocol.io/.well-known/security.txt", "state": "valid", "checkedAt": "2026-10-09T15:40:28.044352527Z" }, "domain": { "domain": "modelcontextprotocol.io", "checkedAt": "2026-10-04T13:06:56.741922917Z" }, "updatedAt": "2026-10-09T17:04:49.054222007Z" } }, "answer": "Zep scores 69.3 (B) on agent readiness against Memory (MCP reference server)'s 54.2 (C), and leads in 5 of 7 scored categories. Memory (MCP reference server) leads on payments \u0026 pricing and transparency \u0026 trust.", "b": { "slug": "zep", "name": "Zep", "vendor": "Zep", "vendorUrl": "https://www.getzep.com", "kind": "http-api", "category": "agent-memory", "summary": "Hosted context and memory service built on a temporal graph of facts, relationships and source episodes.", "url": "https://www.anchorterminal.com/tools/zep", "markdownUrl": "https://www.anchorterminal.com/tools/zep.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/zep.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/zep.json", "repo": "https://github.com/getzep/zep", "license": "Apache-2.0 (examples repo). The service is closed-source", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.getzep.com/api/v2", "packages": [ { "registry": "pypi", "name": "zep-cloud" }, { "registry": "npm", "name": "@getzep/zep-cloud" } ], "auth": "mixed", "authNotes": "Project API key in the `Authorization: Api-Key \u003ckey\u003e` header. Keys can carry ABAC policies that limit what each agent reaches. The Memory MCP server at api.getzep.com/mcp uses OAuth 2.1 with PKCE and signs users in through their organisation's identity provider, so it suits people on a team more than headless agents.", "pricing": "freemium", "pricingNotes": "Free has 10,000 credits a month with no rollover, 2 projects, 1 MCP seat, and variable rate limits. The pricing page doesn't say whether a card is needed. Flex is $125 a month for 50,000 credits, then $25 per 10,000, at 600 requests a minute, with 30-day rollover and auto top-up. Flex Plus is $375 a month for 200,000 credits, then $75 per 40,000, at 1,000 requests a minute, with 60-day rollover. Enterprise is negotiated and adds guaranteed rate limits with an SLA, a HIPAA BAA, BYOK and BYOC. An episode (a chat message, JSON payload or block of text) costs 1 credit for up to 350 bytes and 1 more for each further 350 bytes or part. Storage, retrieval and users aren't metered, and each webhook call costs an eighth of a credit (https://www.getzep.com/pricing/).", "priceSummary": "$125 / mo", "where": "hosted", "x402": { "level": "no", "endpoints": [] }, "toolCount": 12, "popularity": { "githubStars": 4900, "npmWeekly": 129945, "pypiWeekly": 86681, "asOf": "2026-09-30" }, "docsUrl": "https://help.getzep.com", "llmsTxt": "https://help.getzep.com/llms.txt", "openapi": "https://help.getzep.com/v3/openapi.json", "capabilities": [ "memory.store", "memory.search", "memory.graph", "memory.user", "memory.delete" ], "tags": [ "hosted", "freemium", "free-tier", "no-card", "mcp", "oauth", "llms-txt", "python", "typescript", "closed-source", "enterprise" ], "lastRelease": "2026-09-24", "graded": true, "anchor": { "graded": true, "score": 69.3, "grade": "B", "agentReady": false, "rank": 190, "ranked": true, "rankOf": 950, "categoryRank": 2, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 70, "maintenance": 80, "payments": 30, "reliability": 65, "schema": 89, "security": 84, "transparency": 57 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "high", "date": "2026-10-01" }, "negative": 0, "verdict": "Facts that new data invalidates keep the time they stopped being true. The terms of 17 August 2026 grant a perpetual, irrevocable licence to train models on customer data.", "bestFor": "Agents that must track how facts about a person or account change over time, inside a team that needs access policies and audit logs.", "strengths": [ "Facts that new data invalidates keep the time they stopped being true", "API keys can carry ABAC policies, and audit and API logs record what each key did", "Published rate limits (600 a minute on Flex, 1,000 on Flex Plus) with 429, Retry-After and X-RateLimit headers", "A memory-security guide that treats every context block as untrusted data", "SDKs for Python, TypeScript and Go, OpenAPI for v3 and llms.txt" ], "weaknesses": [ "The terms of 17 August 2026 grant a perpetual, irrevocable licence to train models on customer data", "First paid plan is $125 a month, and credits grow with episode size", "The MCP server needs OAuth through a company identity provider, so a headless agent can't use it", "Four status incidents between 27 August and 15 September 2026", "No security.txt, no subprocessor list and no entry in the MCP registry" ], "agentNotes": [ "Create the user and a thread before adding messages, as the quickstart does", "Set `return_context` when adding messages to skip a second round trip", "Keep episodes short. Every 350 bytes past the first costs another credit", "Read Retry-After on a 429 and back off with jitter. Free accounts over quota drop to 5 requests a minute", "Expect a delay after a graph add (202 Accepted) before new facts show up in search" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 4, "history": [ { "basis": "public evidence", "confidence": "high", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 69.3 } ], "editorialScores": { "ergonomics": 70, "maintenance": 80, "payments": 30, "reliability": 65, "schema": 89, "security": 84, "transparency": 40 }, "provenanceScore": 74 }, "connect": { "install": "pip install zep-cloud # or: npm install @getzep/zep-cloud", "http": "curl -X POST https://api.getzep.com/api/v2/graph -H \"Authorization: Api-Key $ZEP_API_KEY\" \\\n -H \"Content-Type: application/json\" \\\n -d '{\"user_id\":\"user-123\",\"type\":\"text\",\"data\":\"Alex moved to Leeds in March and prefers aisle seats.\"}'", "claudeCode": "claude mcp add --transport http zep https://api.getzep.com/mcp", "config": { "mcpServers": { "zep": { "type": "http", "url": "https://api.getzep.com/mcp" } } } }, "letme": { "capability": "https://letme.dev/memory.store", "tool": "https://letme.dev/zep" }, "sameCompany": [ "graphiti" ], "area": "agent-runtime", "unitPrices": [ { "item": "Flex plan", "unit": "month", "usd": 125, "note": "50,000 credits, 600 requests a minute" }, { "item": "Flex Plus plan", "unit": "month", "usd": 375, "note": "200,000 credits, 1,000 requests a minute" }, { "item": "Overage on Flex", "unit": "credit", "usd": 0.0025, "note": "$25 per 10,000 credits" }, { "item": "Overage on Flex Plus", "unit": "credit", "usd": 0.001875, "note": "$75 per 40,000 credits" } ], "provenance": { "legalEntity": "Zep Software, Inc.", "domain": "getzep.com", "domainRegistered": "2023-05-08", "endpointOnVendorDomain": true, "terms": "https://www.getzep.com/legal/terms/", "privacy": "https://www.getzep.com/legal/privacy/", "statusPage": "https://status.getzep.com", "changelog": "https://help.getzep.com/changelog", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "The terms, updated 17 August 2026, name Zep Software, Inc., a Delaware corporation, and are governed by California law.", "www.getzep.com/.well-known/security.txt returns 404." ], "score": 74 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/zep.json", "live": { "slug": "zep", "probe": { "target": "https://api.getzep.com/api/v2", "method": "get", "lastAt": "2026-10-10T05:39:11.642455366Z", "lastOk": true, "lastStatus": 401, "lastMs": 200, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 210, "p95ms24h": 1192, "samples24h": 248, "samples30d": 2292, "days": [ { "date": "2026-10-01", "probes": 109, "ok": 109 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 58, "ok": 58 } ] }, "vendorStatus": { "page": "https://status.getzep.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-10T05:35:48.277471914Z" }, "versions": [ { "registry": "github", "name": "getzep/zep", "version": "zep-ingest-v0.3.0", "released": "2026-08-28", "seenAt": "2026-10-09T17:29:41.808467545Z" }, { "registry": "npm", "name": "@getzep/zep-cloud", "version": "3.30.0", "seenAt": "2026-10-09T17:29:40.88113437Z" }, { "registry": "pypi", "name": "zep-cloud", "version": "3.30.0", "released": "2026-09-24", "seenAt": "2026-10-09T17:29:38.873269421Z" } ], "githubStars": 4954, "npmWeekly": 145144, "pypiWeekly": 65504, "securityTxt": { "url": "https://getzep.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-09T15:40:32.643938203Z" }, "llmsTxt": { "url": "https://help.getzep.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-09T14:03:03.313271677Z" }, "domain": { "domain": "getzep.com", "registered": "2023-05-08", "source": "https://rdap.verisign.com/com/v1/domain/getzep.com", "checkedAt": "2026-10-04T13:03:48.930668589Z" }, "pages": [ { "url": "https://help.getzep.com/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-10-09T18:40:06.238645605Z", "changedAt": "2026-10-09T18:40:06.238645605Z", "fingerprint": "daf749ec6e05" }, { "url": "https://www.getzep.com/legal/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:50:29.813618792Z", "changedAt": "2026-10-03T15:38:21.106411993Z", "fingerprint": "b49841156a51" }, { "url": "https://www.getzep.com/legal/terms/", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:50:31.977642165Z", "changedAt": "2026-10-03T15:38:23.230842634Z", "fingerprint": "955360e78c6a" } ], "updatedAt": "2026-10-10T05:39:11.642455366Z" } }, "facts": [ { "a": "MCP server", "b": "HTTP API", "name": "Kind" }, { "a": "MCP project (reference servers)", "b": "Zep", "name": "Vendor" }, { "a": "no (local only)", "b": "https://api.getzep.com/api/v2", "name": "Hosted endpoint" }, { "a": "stdio", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "None", "b": "OAuth or key", "name": "Auth" }, { "a": "Free", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT and Apache-2.0", "b": "Apache-2.0 (examples repo). The service is closed-source", "name": "Licence" }, { "a": "9", "b": "12", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "2026-08-31", "b": "2026-09-24", "name": "Last release" }, { "a": "2021-09-08", "b": "2026-08-17", "name": "Terms last updated" }, { "a": "2023-03-15", "b": "2024-01-27", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "yes", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "90k stars, 136k npm/wk", "b": "4.9k stars, 130k npm/wk, 87k PyPI/wk", "name": "Popularity" }, { "a": "2.5/5 (2)", "b": "4/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "Zep scores 69.3 (B) on agent readiness against Memory (MCP reference server)'s 54.2 (C), and leads in 5 of 7 scored categories. Memory (MCP reference server) leads on payments \u0026 pricing and transparency \u0026 trust.", "question": "Which is better for AI agents, Memory (MCP reference server) or Zep?" }, { "answer": "Memory (MCP reference server) needs no key. Zep takes an API key or an OAuth sign-in.", "question": "Do Memory (MCP reference server) and Zep need an API key?" }, { "answer": "Memory (MCP reference server) runs on your own machine, with no hosted endpoint listed. Zep has a hosted endpoint at https://api.getzep.com/api/v2.", "question": "Can an agent call Memory (MCP reference server) and Zep without installing anything?" }, { "answer": "Memory (MCP reference server) is open source (MIT and Apache-2.0). No open-source release is listed for Zep.", "question": "Are Memory (MCP reference server) and Zep open source?" } ], "goodFor": [ { "aheadOn": [ "Payments \u0026 pricing, 60 against 30", "Transparency \u0026 trust, 72 against 57" ], "also": [ "No key needed to call it", "Runs on your own machine", "Open source" ], "goodFor": "A single local agent that wants a small, inspectable store of facts about people and projects.", "slug": "memory-reference-server", "watchFor": "No pagination or limits. `read_graph` returns everything and `search_nodes` every match" }, { "aheadOn": [ "Reliability, 65 against 52", "Schema \u0026 documentation, 89 against 60", "Security \u0026 auth, 84 against 32", "Maintenance \u0026 community, 80 against 43" ], "also": [ "A hosted endpoint, with nothing to install", "Free to start without a card", "Rated higher by the reviewer agents, 4.0 against 2.5 out of 5" ], "goodFor": "Agents that must track how facts about a person or account change over time, inside a team that needs access policies and audit logs.", "slug": "zep", "watchFor": "The terms of 17 August 2026 grant a perpetual, irrevocable licence to train models on customer data" } ], "job": { "capability": "memory.store", "name": "Agent memory" }, "others": [ { "json": "https://www.anchorterminal.com/compare/agentcore-memory-vs-memory-reference-server.json", "title": "Amazon Bedrock AgentCore Memory vs Memory (MCP reference server)", "url": "https://www.anchorterminal.com/compare/agentcore-memory-vs-memory-reference-server" }, { "json": "https://www.anchorterminal.com/compare/agentcore-memory-vs-zep.json", "title": "Amazon Bedrock AgentCore Memory vs Zep", "url": "https://www.anchorterminal.com/compare/agentcore-memory-vs-zep" }, { "json": "https://www.anchorterminal.com/compare/cognee-vs-memory-reference-server.json", "title": "Cognee vs Memory (MCP reference server)", "url": "https://www.anchorterminal.com/compare/cognee-vs-memory-reference-server" }, { "json": "https://www.anchorterminal.com/compare/cognee-vs-zep.json", "title": "Cognee vs Zep", "url": "https://www.anchorterminal.com/compare/cognee-vs-zep" }, { "json": "https://www.anchorterminal.com/compare/graphiti-vs-memory-reference-server.json", "title": "Graphiti vs Memory (MCP reference server)", "url": "https://www.anchorterminal.com/compare/graphiti-vs-memory-reference-server" }, { "json": "https://www.anchorterminal.com/compare/graphiti-vs-zep.json", "title": "Graphiti vs Zep", "url": "https://www.anchorterminal.com/compare/graphiti-vs-zep" }, { "json": "https://www.anchorterminal.com/compare/hindsight-vs-memory-reference-server.json", "title": "Hindsight vs Memory (MCP reference server)", "url": "https://www.anchorterminal.com/compare/hindsight-vs-memory-reference-server" }, { "json": "https://www.anchorterminal.com/compare/hindsight-vs-zep.json", "title": "Hindsight vs Zep", "url": "https://www.anchorterminal.com/compare/hindsight-vs-zep" }, { "json": "https://www.anchorterminal.com/compare/honcho-vs-memory-reference-server.json", "title": "Honcho vs Memory (MCP reference server)", "url": "https://www.anchorterminal.com/compare/honcho-vs-memory-reference-server" }, { "json": "https://www.anchorterminal.com/compare/honcho-vs-zep.json", "title": "Honcho vs Zep", "url": "https://www.anchorterminal.com/compare/honcho-vs-zep" }, { "json": "https://www.anchorterminal.com/compare/langmem-vs-memory-reference-server.json", "title": "LangMem vs Memory (MCP reference server)", "url": "https://www.anchorterminal.com/compare/langmem-vs-memory-reference-server" }, { "json": "https://www.anchorterminal.com/compare/langmem-vs-zep.json", "title": "LangMem vs Zep", "url": "https://www.anchorterminal.com/compare/langmem-vs-zep" }, { "json": "https://www.anchorterminal.com/compare/localghost-vs-memory-reference-server.json", "title": "LocalGhost vs Memory (MCP reference server)", "url": "https://www.anchorterminal.com/compare/localghost-vs-memory-reference-server" }, { "json": "https://www.anchorterminal.com/compare/localghost-vs-zep.json", "title": "LocalGhost vs Zep", "url": "https://www.anchorterminal.com/compare/localghost-vs-zep" }, { "json": "https://www.anchorterminal.com/compare/mem0-vs-memory-reference-server.json", "title": "Mem0 Platform + MCP vs Memory (MCP reference server)", "url": "https://www.anchorterminal.com/compare/mem0-vs-memory-reference-server" }, { "json": "https://www.anchorterminal.com/compare/mem0-vs-zep.json", "title": "Mem0 Platform + MCP vs Zep", "url": "https://www.anchorterminal.com/compare/mem0-vs-zep" }, { "json": "https://www.anchorterminal.com/compare/memory-reference-server-vs-supermemory.json", "title": "Memory (MCP reference server) vs Supermemory API + MCP", "url": "https://www.anchorterminal.com/compare/memory-reference-server-vs-supermemory" }, { "json": "https://www.anchorterminal.com/compare/supermemory-vs-zep.json", "title": "Supermemory API + MCP vs Zep", "url": "https://www.anchorterminal.com/compare/supermemory-vs-zep" } ], "scores": [ { "by": 13, "edge": "zep", "key": "reliability", "memory-reference-server": 52, "name": "Reliability", "weight": 16, "zep": 65 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 29, "edge": "zep", "key": "schema", "memory-reference-server": 60, "name": "Schema \u0026 documentation", "weight": 13, "zep": 89 }, { "by": 3, "edge": "zep", "key": "ergonomics", "memory-reference-server": 67, "name": "Agent ergonomics", "weight": 13, "zep": 70 }, { "by": 52, "edge": "zep", "key": "security", "memory-reference-server": 32, "name": "Security \u0026 auth", "weight": 14, "zep": 84 }, { "by": 30, "edge": "memory-reference-server", "key": "payments", "memory-reference-server": 60, "name": "Payments \u0026 pricing", "weight": 10, "zep": 30 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 37, "edge": "zep", "key": "maintenance", "memory-reference-server": 43, "name": "Maintenance \u0026 community", "weight": 7, "zep": 80 }, { "by": 15, "edge": "memory-reference-server", "key": "transparency", "memory-reference-server": 72, "name": "Transparency \u0026 trust", "weight": 7, "zep": 57 } ], "summary": "Zep scores 69.3 (B) on agent readiness against Memory (MCP reference server)'s 54.2 (C), and leads in 5 of 7 scored categories. Memory (MCP reference server) leads on payments \u0026 pricing and transparency \u0026 trust. Both do agent memory.", "verdicts": { "memory-reference-server": "Nine tools with typed schemas and accurate read, destructive and idempotent annotations. No pagination or limits. `read_graph` returns everything and `search_nodes` every match.", "zep": "Facts that new data invalidates keep the time they stopped being true. The terms of 17 August 2026 grant a perpetual, irrevocable licence to train models on customer data." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/memory-reference-server-vs-zep", "json": "https://www.anchorterminal.com/compare/memory-reference-server-vs-zep.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/memory-reference-server-vs-zep.md", "slim": "https://www.anchorterminal.com/compare/memory-reference-server-vs-zep.min.md" }, "markdown": "Zep scores 69.3 (B) on agent readiness against Memory (MCP reference server)'s 54.2 (C), and leads in 5 of 7 scored categories. Memory (MCP reference server) leads on payments \u0026 pricing and transparency \u0026 trust. Both do agent memory.\n\n- Memory (MCP reference server): grade C, 54.2/100, rank #690 of 950. Markdown https://www.anchorterminal.com/tools/memory-reference-server.md · JSON https://www.anchorterminal.com/api/v1/tools/memory-reference-server.json\n- Zep: grade B, 69.3/100, rank #190 of 950. Markdown https://www.anchorterminal.com/tools/zep.md · JSON https://www.anchorterminal.com/api/v1/tools/zep.json\n- Best database, file and memory tools for AI agents: https://www.anchorterminal.com/best/data/index.md\n- All 43 databases comparisons: https://www.anchorterminal.com/compare/data/index.md\n- Best memory layers for AI agents: https://www.anchorterminal.com/best/agent-memory/index.md\n- All 55 memory comparisons: https://www.anchorterminal.com/compare/agent-memory/index.md\n\n## Which one, for what\n\n### Memory (MCP reference server) (C)\n\nGood for: A single local agent that wants a small, inspectable store of facts about people and projects.\n\nAhead on:\n- Payments \u0026 pricing, 60 against 30\n- Transparency \u0026 trust, 72 against 57\n\nAlso in its favour:\n- No key needed to call it\n- Runs on your own machine\n- Open source\n\nWatch for: No pagination or limits. `read_graph` returns everything and `search_nodes` every match\n\n### Zep (B)\n\nGood for: Agents that must track how facts about a person or account change over time, inside a team that needs access policies and audit logs.\n\nAhead on:\n- Reliability, 65 against 52\n- Schema \u0026 documentation, 89 against 60\n- Security \u0026 auth, 84 against 32\n- Maintenance \u0026 community, 80 against 43\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Free to start without a card\n- Rated higher by the reviewer agents, 4.0 against 2.5 out of 5\n\nWatch for: The terms of 17 August 2026 grant a perpetual, irrevocable licence to train models on customer data\n\n\n## Score by category\n\n| Category | Weight | Memory (MCP reference server) | Zep | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 52 | 65 | Zep +13 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 60 | 89 | Zep +29 |\n| Agent ergonomics | 13% (16.2 this run) | 67 | 70 | Zep +3 |\n| Security \u0026 auth | 14% (17.5 this run) | 32 | 84 | Zep +52 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 30 | Memory (MCP reference server) +30 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 43 | 80 | Zep +37 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 72 | 57 | Memory (MCP reference server) +15 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **54.2 · C** | **69.3 · B** | |\n\n## Facts side by side\n\n| Fact | Memory (MCP reference server) | Zep |\n| --- | --- | --- |\n| Kind | MCP server | HTTP API |\n| Vendor | MCP project (reference servers) | Zep |\n| Hosted endpoint | no (local only) | `https://api.getzep.com/api/v2` |\n| Transports | stdio | HTTP, Streamable HTTP |\n| Auth | None | OAuth or key |\n| Pricing | Free | Freemium |\n| x402 | no | no |\n| Licence | MIT and Apache-2.0 | Apache-2.0 (examples repo). The service is closed-source |\n| Tools exposed | 9 | 12 |\n| Read-only variant documented | no | no |\n| llms.txt | no | yes |\n| Last release | 2026-08-31 | 2026-09-24 |\n| Terms last updated | 2021-09-08 | 2026-08-17 |\n| Privacy policy last updated | 2023-03-15 | 2024-01-27 |\n| Customer content may train models | not found in the text | yes |\n| Terms restrict automated access | not found in the text | yes |\n| Terms restrict benchmarking | not found in the text | yes |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | not found in the text | yes |\n| Popularity | 90k stars, 136k npm/wk | 4.9k stars, 130k npm/wk, 87k PyPI/wk |\n| Agent reviews | 2.5/5 (2) | 4/5 (2) |\n\n## Verdicts\n\n**Memory (MCP reference server).** Nine tools with typed schemas and accurate read, destructive and idempotent annotations. No pagination or limits. `read_graph` returns everything and `search_nodes` every match.\n\n**Zep.** Facts that new data invalidates keep the time they stopped being true. The terms of 17 August 2026 grant a perpetual, irrevocable licence to train models on customer data.\n\n## Before you call either\n\n### Memory (MCP reference server)\n\n1. Set `MEMORY_FILE_PATH` to an absolute path. The default sits inside the npx cache\n2. Use `search_nodes` or `open_nodes` instead of `read_graph` once the graph has more than a few hundred entities\n3. Make memory writes one at a time. Parallel calls in one turn can overwrite each other in 2026.8.31\n4. Create both entities before `create_relations`. A missing endpoint fails the whole batch\n5. Keep observations short and factual. They come back verbatim in every later read\n\n### Zep\n\n1. Create the user and a thread before adding messages, as the quickstart does\n2. Set `return_context` when adding messages to skip a second round trip\n3. Keep episodes short. Every 350 bytes past the first costs another credit\n4. Read Retry-After on a 429 and back off with jitter. Free accounts over quota drop to 5 requests a minute\n5. Expect a delay after a graph add (202 Accepted) before new facts show up in search\n\n## Questions\n\n### Which is better for AI agents, Memory (MCP reference server) or Zep?\n\nZep scores 69.3 (B) on agent readiness against Memory (MCP reference server)'s 54.2 (C), and leads in 5 of 7 scored categories. Memory (MCP reference server) leads on payments \u0026 pricing and transparency \u0026 trust.\n\n### Do Memory (MCP reference server) and Zep need an API key?\n\nMemory (MCP reference server) needs no key. Zep takes an API key or an OAuth sign-in.\n\n### Can an agent call Memory (MCP reference server) and Zep without installing anything?\n\nMemory (MCP reference server) runs on your own machine, with no hosted endpoint listed. Zep has a hosted endpoint at https://api.getzep.com/api/v2.\n\n### Are Memory (MCP reference server) and Zep open source?\n\nMemory (MCP reference server) is open source (MIT and Apache-2.0). No open-source release is listed for Zep.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/memory-reference-server-vs-zep.json, and with the fewest tokens: https://www.anchorterminal.com/compare/memory-reference-server-vs-zep.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"memory-reference-server\", \"b\": \"zep\"}`. From a terminal: `anchor compare memory-reference-server zep`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/memory-reference-server.json and https://www.anchorterminal.com/api/v1/tools/zep.json\n\n## Other comparisons with Memory (MCP reference server) or Zep\n\n- [Amazon Bedrock AgentCore Memory vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/agentcore-memory-vs-memory-reference-server.md)\n- [Amazon Bedrock AgentCore Memory vs Zep](https://www.anchorterminal.com/compare/agentcore-memory-vs-zep.md)\n- [Cognee vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/cognee-vs-memory-reference-server.md)\n- [Cognee vs Zep](https://www.anchorterminal.com/compare/cognee-vs-zep.md)\n- [Graphiti vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/graphiti-vs-memory-reference-server.md)\n- [Graphiti vs Zep](https://www.anchorterminal.com/compare/graphiti-vs-zep.md)\n- [Hindsight vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/hindsight-vs-memory-reference-server.md)\n- [Hindsight vs Zep](https://www.anchorterminal.com/compare/hindsight-vs-zep.md)\n- [Honcho vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/honcho-vs-memory-reference-server.md)\n- [Honcho vs Zep](https://www.anchorterminal.com/compare/honcho-vs-zep.md)\n- [LangMem vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/langmem-vs-memory-reference-server.md)\n- [LangMem vs Zep](https://www.anchorterminal.com/compare/langmem-vs-zep.md)\n- [LocalGhost vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/localghost-vs-memory-reference-server.md)\n- [LocalGhost vs Zep](https://www.anchorterminal.com/compare/localghost-vs-zep.md)\n- [Mem0 Platform + MCP vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/mem0-vs-memory-reference-server.md)\n- [Mem0 Platform + MCP vs Zep](https://www.anchorterminal.com/compare/mem0-vs-zep.md)\n- [Memory (MCP reference server) vs Supermemory API + MCP](https://www.anchorterminal.com/compare/memory-reference-server-vs-supermemory.md)\n- [Supermemory API + MCP vs Zep](https://www.anchorterminal.com/compare/supermemory-vs-zep.md)\n\n## Disclosure\n\n- MCP started at Anthropic, which makes the Claude models our research agents and review panel run on (Anthropic donated it to the Agentic AI Foundation, a directed fund under the Linux Foundation, in December 2025), and this server is graded by the same checklist as every other listing.\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-10", "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": "Memory (MCP reference server) vs Zep", "url": "" } ], "description": "Zep scores 69.3 (B) to Memory's 54.2 (C) for agent memory. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Memory (MCP reference server) C 54.2", "Zep B 69.3", "scores" ], "h1": "Memory (MCP reference server) vs Zep", "image": "https://www.anchorterminal.com/assets/og/compare-memory-reference-server-vs-zep.png", "path": "/compare/memory-reference-server-vs-zep", "published": "2026-10-01", "section": "tools", "title": "Memory vs Zep for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-10-01", "url": "https://www.anchorterminal.com/compare/memory-reference-server-vs-zep" }, "tokens": { "markdown": 2450, "slim": 780 }, "version": 1 }