Ambr MCP MCP server

The Ambr MCP server allows AI agents to manage Agent Mandates and Ricardian contracts natively. It provides tools for listing templates, creating contracts, verifying hashes, and handling agent handshakes, enabling authorized agent-to-agent commerce on the Base blockchain.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Ambr

MCP endpoint (Streamable HTTP)

https://getamber.dev/api/mcp

Vendor documentation

What you can do with it

Create delegation mandates for autonomous agents
Verify contract integrity using SHA-256 hashes
Manage agent handshakes and visibility preferences
List available contract templates

Tools advertised by the last live check:

ambr_list_templates
ambr_create_contract
ambr_get_contract
ambr_get_contract_status
ambr_verify_hash
ambr_agent_handshake

Connect from your client

Each snippet registers the same endpoint; pick the client you 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.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http ambr-mcp https://getamber.dev/api/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add ambr-mcp --url https://getamber.dev/api/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable ambr-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "ambr-mcp": {
      "url": "https://getamber.dev/api/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "ambr-mcp": {
      "type": "streamableHttp",
      "url": "https://getamber.dev/api/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start ambr-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "ambr-mcp": {
      "type": "http",
      "url": "https://getamber.dev/api/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http ambr-mcp https://getamber.dev/api/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "ambr-mcp": {
      "url": "https://getamber.dev/api/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "ambr-mcp": {
      "serverUrl": "https://getamber.dev/api/mcp"
    }
  }
}

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