MetaMynd MCP Gateway

Status: 0.2.5, developer preview. The design is in docs/design.md; what each AI app actually does is in docs/hosts.md. Releases: docs/releasing.md and the release checklist. Reviewed servers: catalog/ (Notion, HubSpot, Brave Search).

Put any AI agent that uses MCP tools under MetaMynd governance — Claude Desktop, Cursor, VS Code, ChatGPT, LangGraph, the OpenAI Agents SDK and the rest — without changing any code.

The gateway sits between your AI app and the MCP servers it uses. Every tool call is checked against the agent's mandate before it runs: allowed calls go through, calls over a limit are refused, and calls that need a person are held for approval. The tools' API keys live in the gateway, not in the app, so the AI can't go around it.

 your AI app ──MCP──▶ @metamynd/mcp-gateway ──MCP──▶ your tools (payments, CRM, records, …)
                              │
                              └──▶ MetaMynd: allow · refuse · hold for approval

• For non-developers first: a one-click Claude Desktop extension and a "Connect to …" button in the MetaMynd dashboard.

• Every tool governed, reads included — a tool is either governed or not offered.

• Runs on your machine (or your own server for hosted chat products). MetaMynd never holds your tools' keys.

Built on the open-source MetaMynd SDKs in Metamynd/agentsafe-guard and the MAGP v1.0 protocol.

Commands (developer preview)

mcp-gateway secret set payments-api-key            # store a tool's key in the OS keychain (input hidden)
mcp-gateway init --config mcp-gateway.json         # draft a mapping for every tool of every server
mcp-gateway --config mcp-gateway.json              # run it for an AI app (stdio)
mcp-gateway extension --config mcp-gateway.json --name "Accounts Payable"   # one-click Claude Desktop extension
mcp-gateway config --host cursor --config mcp-gateway.json                 # the snippet for another app

extension builds a .mcpb for one agent. Nothing secret is inside it: each credential, and the agent's key, becomes a field Claude Desktop asks for at install and stores securely. config --host knows claude-desktop, claude-code, cursor, vscode, openai-agents-python, openai-agents-js and langchain (docs/hosts.md).

init marks every drafted tool "review": true; the gateway will not start until each one has been checked against the agent's mandate and the flag removed. Credentials are referenced, never written: keychain:<name> or ${VAR}. The configuration format is in docs/design.md §4.

Related MCP server: AgentsGate

For integrators

The MetaMynd dashboard builds each agent's setup with three typed entry points:

import { loadCatalog, configFromCatalog, credentialFields, serviceSetupFor } from '@metamynd/mcp-gateway/catalog';
import { planExtension, composeExtension } from '@metamynd/mcp-gateway/extension';
import { hostSnippet, directAccessWarning } from '@metamynd/mcp-gateway/hosts';

Pass credentialFields(catalog, picks) to planExtension as fields so Claude Desktop asks for each credential by its catalog title ("Notion integration token"), and serviceSetupFor(catalog, picks) gives the service-side permissions to set on that credential, so it can do no more than the picked tools need. The base bundle composeExtension builds from is attached to each GitHub release (docs/releasing.md).

License

MIT