agent-custody MCP

An MCP gateway that checks every agent tool call against a signed grant and policy, forwards or denies it, and issues a signed receipt. It provides a tamper-evident Merkle log and offline verification capabilities to ensure auditability and provenance of AI agent actions.

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Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by svayatta

Vendor documentation

What you can do with it

Verify agent tool calls against signed grants
Generate signed receipts for audit trails
Enforce Cedar policies before tool execution
Verify receipts offline using public keys

Source and maintenance

Community listingRegistry 0.13.0

mcp-registry: io.github.svayatta/agent-custody@0.13.0 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@agent-custody/receipts 0.13.0

npmnpx

@agent-custody/receipts package definition

{
  "version": "0.13.0",
  "transport": "stdio",
  "identifier": "@agent-custody/receipts",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "packageArguments": [
    {
      "type": "positional",
      "value": "gateway",
      "valueHint": "command",
      "description": "Run the MCP gateway in front of your upstream tools"
    },
    {
      "name": "--config",
      "type": "named",
      "format": "filepath",
      "isRequired": true,
      "description": "Path to gateway.json: the upstream MCP or REST tools, the signed grant, the Cedar policy, the gateway key, and the log"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "agent-custody-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@agent-custody/receipts@0.13.0",
        "gateway"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "agent-custody-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@agent-custody/receipts@0.13.0",
        "gateway"
      ]
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "agent-custody-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@agent-custody/receipts@0.13.0",
        "gateway"
      ]
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "agent-custody-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@agent-custody/receipts@0.13.0",
        "gateway"
      ]
    }
  }
}

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