# Best database, file and memory tools for AI agents (slim)

> MongoDB MCP Server (A), Supabase API + MCP (BB) and CoinMarketCap x402 API (B) lead the 12 ranked database, file and memory tools. Picks by need, strengths, weaknesses and prices from the Anchor benchmark.

- Full: https://www.anchorterminal.com/best/data/index.md (~6,000 tokens) · this version ~1,580 tokens · JSON https://www.anchorterminal.com/best/data/index.json · canonical https://www.anchorterminal.com/best/data/
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

The 10 highest-scoring of 12 database, file and memory tools on the Anchor benchmark, with a pick for each need and where each one falls short. Scores come from public evidence, re-checked as vendors change.

- Ranked: 12 · agent-ready (BB or better): 2 · accept x402: 2 · hosted endpoints: 4
- Full ranked table: https://www.anchorterminal.com/categories/data.md
- Head-to-head comparisons: https://www.anchorterminal.com/compare/data/index.md (43)
- Methodology: https://www.anchorterminal.com/benchmark/index.md

## The shortlist

| # | Tool | Grade | Score | Best for | Price | Where |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | [MongoDB MCP Server](https://www.anchorterminal.com/tools/mongodb-mcp.md) | A | 79.9 | Agents that query or administer MongoDB and Atlas, with read-only and confirmation controls an operator can rely on. | Free · OSS | local |
| 2 | [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md) | BB | 75.6 | Agents building on or administering Supabase projects, and for retrieval that wants vectors, full-text and SQL filters in one database. | $25 / mo | hosted and local |
| 3 | [CoinMarketCap x402 API](https://www.anchorterminal.com/tools/coinmarketcap-x402-api.md) | B | 68.3 | Agents that need current prices, rankings or DEX pair quotes without an account and can batch symbols. | $0.01 / call | hosted |
| 4 | [Nansen x402 API](https://www.anchorterminal.com/tools/nansen-x402-api.md) | B | 67.4 | Agents that track wallets, token flows and Smart Money and want to pay per call without an account. | $0.01 / call | hosted |
| 5 | [PlanetScale MCP Server](https://www.anchorterminal.com/tools/planetscale-mcp.md) | B | 66.4 | Agents that inspect and tune an existing PlanetScale database, using Insights, schema recommendations, error patterns and logs, with SQL when granted. | $5 / mo | hosted |
| 6 | [ClickHouse MCP Server](https://www.anchorterminal.com/tools/clickhouse-mcp-server.md) | B | 64.6 | Teams with a ClickHouse database, self-managed or Cloud, that want an agent to explore schemas and run analytical SQL, read-only unless told otherwise. | Free · OSS | local |
| 7 | [Filesystem (MCP reference server)](https://www.anchorterminal.com/tools/filesystem-reference-server.md) | C | 59.2 | Giving a local agent scoped read and write access to a project folder with host-side gating of writes through annotations. | Free · OSS | local |
| 8 | [Snowflake-managed MCP server](https://www.anchorterminal.com/tools/snowflake-managed.md) | C | 56.4 | A company that already keeps its data in Snowflake and wants outside MCP clients to query it under existing roles, best through one Cortex Agent tool. | $2 / credit | local |
| 9 | [Redis MCP](https://www.anchorterminal.com/tools/redis-mcp.md) | C | 55.7 | Teams with a Redis database that want an agent to read and write keys, streams, JSON documents and vector indexes on a developer's machine. | Free · OSS | local |
| 10 | [Memory (MCP reference server)](https://www.anchorterminal.com/tools/memory-reference-server.md) | C | 54.2 | A single local agent that wants a small, inspectable store of facts about people and projects. | Free · OSS | local |

## Picks by need

- Highest score overall: [MongoDB MCP Server](https://www.anchorterminal.com/tools/mongodb-mcp.md), A, 79.9/100 on the benchmark. Also [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md), BB, 75.6/100.
- Schema & documentation: [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md), 89/100 on schema & documentation, against 81 for the overall leader.
- Agent ergonomics: [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md), 88/100 on agent ergonomics, against 75 for the overall leader.
- Security & auth: [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md), 84/100 on security & auth, against 81 for the overall leader.
- Maintenance & community: [ClickHouse MCP Server](https://www.anchorterminal.com/tools/clickhouse-mcp-server.md), 94/100 on maintenance & community, against 92 for the overall leader.
- Transparency & trust: [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md), 90/100 on transparency & trust, against 83 for the overall leader.
- Paying per call with no account (x402): [CoinMarketCap x402 API](https://www.anchorterminal.com/tools/coinmarketcap-x402-api.md), accepts x402, $0.01 a call. Also [Nansen x402 API](https://www.anchorterminal.com/tools/nansen-x402-api.md), accepts x402, $0.01 a call.
- A hosted MCP endpoint: [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md), remote MCP server, nothing to install.
- Self-hosting under an open licence: [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md), self-hosted, Apache-2 licence. Also [ClickHouse MCP Server](https://www.anchorterminal.com/tools/clickhouse-mcp-server.md), self-hosted, Apache-2 licence.

## How to choose

- Read and write scope: Check whether access can be limited to read or write on named tables, collections or folders, since an agent with broad write access can destroy data.
- Self-hosted or hosted storage: Check whether a local file or memory tool keeps data on the agent's own machine or a hosted service, because that decides which data protection terms apply.
- Rate limits and result caps: Check the rate limits and row or result caps, since an agent that loops over queries will hit a throttle or get a truncated result without noticing.
- Network path and sub-processors: Check which network paths and sub-processors touch query data, since a hosted database may route an agent's rows through infrastructure its operator never approved.

Each listing's verdict, strengths and weaknesses: https://www.anchorterminal.com/best/data/index.md