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Venmo MCP Integration for LangChain

Connect Venmo to LangChain through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

7 functions 6 read 1 write Manual OAuth token auth
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Connect Venmo to LangChain

Bridge LangChain agents to local KosmoKrator integration tools through MCP or headless CLI calls.

Use the MCP gateway when the agent should discover tools, or wrap kosmo integrations:call for fixed chains. The gateway is local, scoped to this integration, and starts with --write=deny so LangChain can inspect read-capable tools without receiving write access by default.

Venmo MCP Config for LangChain

Keep the gateway scoped to the integration and operation class needed by the chain.

{
  "mcpServers": {
    "kosmokrator-venmo": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=venmo",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=venmo --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only Venmo instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

Venmo Tools Visible to LangChain

LangChain sees stable MCP tool names generated from the Venmo integration catalog.

MCP toolSource functionTypeDescription
integration__venmo__venmo_list_payments venmo.venmo_list_payments Read List Venmo payments with optional filtering. Supports pagination with limit and offset parameters.
integration__venmo__venmo_get_payment venmo.venmo_get_payment Read Retrieve a Venmo payment by ID. Returns full payment details including amount, status, note, sender, and recipient.
integration__venmo__venmo_create_payment venmo.venmo_create_payment Write Create a Venmo payment. Specify amount, recipient user ID, an optional note, and audience visibility.
integration__venmo__venmo_list_users venmo.venmo_list_users Read List Venmo users with optional filtering. Supports search by username, email, or phone and pagination.
integration__venmo__venmo_get_user venmo.venmo_get_user Read Retrieve a Venmo user by ID. Returns user profile details including username, display name, and profile picture.
integration__venmo__venmo_list_transactions venmo.venmo_list_transactions Read List Venmo transactions with optional filtering. Supports filtering by date range, action type, and pagination.
integration__venmo__venmo_get_current_user venmo.venmo_get_current_user Read Get the currently authenticated Venmo user. Returns the authenticated user's full profile including balance and account details.

Related Venmo Pages

Venmo CLIUse direct JSON commands instead of MCP discovery. Venmo MCPFull gateway reference and MCP tool names. KosmoKrator for LangChainClient-level gateway setup.