Home / MCP registry index / finance.double.agent4/knowledge-base
Knowledge Base
finance.double.agent4/knowledge-base in the official MCP registry.
Endpoint https://agent4.double.finance/mcp/message.
The registry describes it as: AI-powered knowledge base for Double - Thank You with semantic search and question answering.
We could not reach this server's endpoint on 2026-10-26. Nothing was checked.
Rather than checking back: subscribe to this server's tool changes (a feed, no account and no address needed). Tool names and dates only, never what a tool says.
Run this server? Show the check in your README
The badge reflects the latest read: 
[](https://lazaretto.dev/mcp-registry/finance-double-agent4-knowledge-base)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. How tool poisoning works. What we found across the registry. Check another server.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.
Related
Memory and knowledge MCP servers
| pg.ddx.io: the PostgreSQL community's memory io.ddx.pg/archive | 125 tools, nothing matched 2026-10-27 |
| AgentMart ai.ciphyr.agentmart/agentmart | 112 tools, nothing matched 2026-10-21 |
| Wicked MCP io.github.WickedAPI/wicked-mcp | 108 tools, nothing matched 2026-10-27 |
| Anansi Haven io.github.kburrus64-max/anansi-haven | 89 tools, nothing matched 2026-10-29 |
| Webbersites x402 Data Api io.github.webberdesign/webbersites-x402-data-api | 78 tools, nothing matched 2026-10-22 |
| Brainkb org.brainkb/brainkb | 72 tools, nothing matched 2026-11-04 |