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52 lines
2.0 KiB
Markdown
52 lines
2.0 KiB
Markdown
---
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description: Run OpenHuman Core as a read-only stdio Model Context Protocol server.
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icon: plug
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---
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# MCP Server
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OpenHuman Core can run as an opt-in stdio MCP server for local MCP clients such
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as Claude Desktop, Cursor, or Zed.
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```bash
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openhuman-core mcp
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```
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The command does not start the HTTP JSON-RPC server. It reads newline-delimited
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JSON-RPC 2.0 messages from stdin and writes MCP responses to stdout. Logs go to
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stderr; add `--verbose` for debug output.
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## Tools
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The first MCP surface is deliberately read-only and routes through the existing
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controller registry plus the core security policy read gate:
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| MCP tool | Backing RPC | Purpose |
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| --- | --- | --- |
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| `memory.search` | `openhuman.memory_tree_search` | Keyword search over memory-tree chunks. |
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| `memory.recall` | `openhuman.memory_tree_recall` | Semantic recall over memory-tree summaries/chunks. |
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| `tree.read_chunk` | `openhuman.memory_tree_get_chunk` | Read one chunk returned by search or recall. |
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`memory.search` and `memory.recall` accept `query` plus optional `k` (default
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10, capped at 50). `tree.read_chunk` accepts `chunk_id`.
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## Smoke Test
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```bash
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printf '%s\n' \
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'{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"smoke","version":"0"}}}' \
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'{"jsonrpc":"2.0","method":"notifications/initialized"}' \
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'{"jsonrpc":"2.0","id":2,"method":"tools/list"}' \
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| openhuman-core mcp
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```
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The response should include `capabilities.tools` from `initialize` and the three
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tool names from `tools/list`. A successful run writes exactly two compact JSON
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response lines to stdout; the `notifications/initialized` message is a
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notification and has no response.
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```text
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{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":"2025-06-18","capabilities":{"tools":{}},"serverInfo":{"name":"openhuman-core","version":"<crate version>"},"instructions":"..."}}
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{"jsonrpc":"2.0","id":2,"result":{"tools":[{"name":"memory.search",...},{"name":"memory.recall",...},{"name":"tree.read_chunk",...}]}}
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```
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