Category · Developer & infrastructure
Database, file and memory tools for AI agents
SQL and document databases, managed backends, local file systems and persistent memory.
Capability keys db.sql · db.document · db.admin · fs.local · memory.graph · All tools
letme.dev/db.sql picks the top-graded tool in this list and says how to call it direct; calling through letme comes later.
The same listing from the live API. Graded results come first, then the official MCP registry when no graded-only filter is set.
https://www.anchorterminal.com/api/v1/searchFilters
| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 13 | MongoDB MCP ServerMongoDB · MCP server | Databases | A | 78.6 | 3.5 (8) | n/a | n/a | Free · OSS | OAuth or key | Local | ||
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MongoDB's official MCP server for querying and managing databases and Atlas resources, with configurable tool access. Top strength
Top weakness 53 tools with Atlas credentials, and most database tool descriptions are one line |
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| 30 | Supabase API + MCPSupabase · HTTP API | Databases | BB | 75.8 | 3.3 (8) | n/a | n/a | $25 / mo | OAuth or key | Hosted + local | ||
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Hosted Postgres with an auto-generated REST API (PostgREST), GraphQL, auth, storage, realtime and Edge Functions, plus a Management API and an official MCP server. Top strength OAuth 2.1 with dynamic client registration, plus personal access tokens scoped to chosen projects and permissions Top weakness Several multi-hour platform incidents between 27 August and 30 September |
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| 127 | CoinMarketCap x402 APICoinMarketCap · HTTP API | Databases | B | 68.3 | 3.0 (2) | n/a | n/a | $0.01 / call x402 | None | Hosted | ||
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CoinMarketCap market-data endpoints for cryptocurrency and DEX quotes, with per-call USDC payments through x402. Top strength x402 on four endpoints at $0.01 a call, with payment taken only when data is returned Top weakness Only four endpoints are sold by x402, and none of them covers history |
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| 142 | Nansen x402 APINansen · HTTP API | Databases | B | 67.4 | 3.5 (2) | n/a | n/a | $0.01 / call x402 | None | Hosted | ||
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Nansen's on-chain analytics API for wallets, tokens and transaction flows, with per-call stablecoin payments through x402. Top strength x402 on every Pro endpoint except labels, $0.01 or $0.05 a call, on Base, Solana or Monad Top weakness No status page, incident history or SLA that we could find |
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| 266 | Filesystem (MCP reference server)MCP project (reference servers) · MCP server | Databases | C | 59.4 | 3.5 (2) | n/a | n/a | Free · OSS | None | Local | ||
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Reference server for secure local file operations (read, write, edit, search, directory listing) restricted to allowed directories supplied as arguments or via MCP Roots. Top strength All 14 tools carry Top weakness No depth limit on |
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| 322 | Memory (MCP reference server)MCP project (reference servers) · MCP server | Databases | C | 54.4 | 2.5 (2) | n/a | n/a | Free · OSS | None | Local | ||
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Knowledge-graph persistent memory reference server (entities, relations, observations) stored as JSONL at MEMORY_FILE_PATH. Top strength Nine tools with typed schemas and accurate read, destructive and idempotent annotations Top weakness No pagination or limits. |
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| 436 | Postgres MCP ProCrystal DBA · MCP server | Databases | F | 36.7 | 2.5 (2) | n/a | n/a | Free · OSS | None | Local | ||
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PostgreSQL server with configurable read/write access plus DBA tooling (index tuning with hypopg, EXPLAIN analysis, top-query and workload analysis, health checks). Top strength Index tuning with hypopg, EXPLAIN with hypothetical indexes, top queries and seven health checks Top weakness No release since 0.3.0 on 16 May 2025, and |
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| 449 | PostgreSQL (archived MCP reference server)Archived Model Context Protocol (archived) · MCP server | Databases | F | 18.6 | 1.5 (2) | n/a | n/a | Free · OSS | None | Local | ||
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Archived PostgreSQL reference MCP server for SQL queries. Its read-only transaction wrapper has a documented bypass. Top strength One tool of about 180 characters, cheap to load into context Top weakness The read-only transaction can be escaped with a multi-statement query, disclosed in August 2025 and never fixed |
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Nothing matches these filters. .
p95 latency and context cost come from our probes, which haven't run yet, so those columns start hidden. Grades run from AA to F, and agent-ready means BB or better. Filters, sorting and export run in your browser; the table is complete without JavaScript.
Indexed, not reviewed (31)
Listings sorted into this category from public catalogues (the official MCP registry, APIs.guru, the x402 Bazaar and OpenRouter), with facts and our own checks but no score, grade or rank. How the index works.
| Listing | Kind | What it does | Why it's here |
|---|---|---|---|
| Aiven MCP aiven.io | MCP server | Provision PostgreSQL, manage Apache Kafka, and deploy apps with Aiven - all from your AI assistant. | vendor's own |
| busabase busabase.com | MCP server | Database for your AI agent. Turn its output into data, docs, skills, and apps you can actually use. | vendor's own |
| CADBridge MCP Server for AutoCAD dmytro-prototypes.net | MCP server | Control AutoCAD with AI: commands, read/edit/write drawing database, AutoLISP, scripts, PDF plots. | vendor's own |
| cli settlemesh.io | MCP server | Deploy and monetize agent-built apps: login, database, usage billing, and end-user-pays. | vendor's own |
| Control AutoCAD MCP Server dmytro-prototypes.net | MCP server | Control AutoCAD with AI: commands, read/edit/write drawing database, AutoLISP, scripts, PDF plots. | vendor's own |
| Control AutoCAD MCP Server dmytro-prototypes.net | MCP server | Control AutoCAD with AI: commands, read/edit/write drawing database, AutoLISP, scripts, PDF plots. | vendor's own |
| Cortex RMCP dinglebear.ai | MCP server | Self-hosted homelab log intelligence over MCP, CLI, and REST with SQLite/FTS. | vendor's own |
| DBCode dbcode.io | MCP server | Query and explore 100+ databases through your DBCode connections. | vendor's own, widely used |
| dbmcp haymon.ai | MCP server | Database MCP server for MySQL, MariaDB, PostgreSQL & SQLite with PII redaction and write-prevention | vendor's own |
| dbtrail dbtrail.com | MCP server | MySQL change tracking with instant row-level recovery and forensic attribution for compliance. | vendor's own |
| Grimoire ttrpg.bot | MCP server | Campaign manager for D&D and TTRPG GMs: your AI reads and writes a live typed campaign database. | vendor's own |
| Homespun homespun.dev | MCP server | Deploy a multi-user web app from your agent: hosting, auth, database, and permissions. | vendor's own |
| keboola.com MCP server keboola.com | MCP server | Connect your AI assistants to Keboola and expose your data, transformations, SQL queries, ... | vendor's own |
| KIAgent localkiagent.com | MCP server | Your mail, chats and documents indexed into a local SQLite corpus, served to AI clients over MCP. | vendor's own |
| matih.ai MCP server matih.ai | MCP server | The grounded data layer for any LLM: governed SQL, metrics, lineage and catalog over your data. | vendor's own |
| Neon neon.com | MCP server | Official Neon MCP server for managing Neon projects and Lakebase Postgres databases. | vendor's own, widely used |
| NicheDB nichedb.dev | MCP server | Sources in, feeds out: an open, ever-growing database of real-time public data, enriched. | vendor's own, widely used |
| prisma.io MCP server prisma.io | MCP server | MCP server for managing Prisma Postgres. | vendor's own |
| QueryWeaver falkordb.com | MCP server | An MCP server for Text2SQL: transforms natural language into SQL using graph schema understanding. | vendor's own, widely used |
| read-only-local-mysql-mcp-server hove.capital | MCP server | MCP server for read-only MySQL database queries in Claude Desktop | vendor's own |
| read-only-local-postgres-mcp-server hove.capital | MCP server | MCP server for read-only PostgreSQL database queries in Claude Desktop | vendor's own |
| Run402 run402.com | MCP server | x402 pay-per-call infra for agents: $0.03 image generation, Postgres, auth, storage, functions. | vendor's own, widely used |
| sap-abap-sql daslab.run | MCP server | Checks and fixes ABAP Open SQL for SAP's ADT data-preview console. Connects to nothing. | vendor's own |
| Scalix Cloud scalix.world | MCP server | The agent-native cloud: database, functions, AI, storage, computers. 50 tools, one API key. | vendor's own |
| Seedfast seedfa.st | MCP server | Generates relationally valid test data in a PostgreSQL database from its live schema. | vendor's own |
| sota.io MCP server sota.io | MCP server | EU-native PaaS for AI agents — deploy web apps with one sentence, managed Postgres, GDPR by default. | vendor's own |
| Spryloom spryloom.com | MCP server | Publish apps from Claude Code, Codex or Cursor to your team, behind sign-in, with a database. | vendor's own |
| STRING Database MCP Server string-db.org | MCP server | Query STRING interactions, enrichment, annotations, homology, and PPI networks. | vendor's own |
| Stuga stuga.dev | MCP server | Agent edits await review by default in a self-hosted workspace for documents and databases. | vendor's own, widely used |
| Tabellum dudko.dev | MCP server | MCP bridge to the Tabellum database client: schema, reads, SQL drafts; writes approved in the app. | vendor's own |
| valv valv.sh | MCP server | Let coding agents query any SQL database safely. Read-only by default and scoped by your policies. | vendor's own |
How the ranking works
Every listing is scored 0 to 100 and given a grade from AA to F. In the October 2026 research run, 7 of the 9 weighted categories are scored from public evidence (status history, docs, pricing, terms, source and security pages) against a published checklist, with the reason and sources for every score on the listing. Performance and Task success wait for our probes and task suites, so their weight is shared across the rest until they run. Negative events deduct up to 15 points. Read the methodology.
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