payfetch MCP

A non-custodial stdio MCP server that enables AI agents to automatically pay for web content via the x402 payment protocol. It enforces strict spending controls including per-call, per-day, and per-host caps, host allow/deny lists, and human-approval thresholds. The client uses the user's own wallet, ensuring keys never leave the machine, and maintains an append-only receipt log for all payment attempts.

Package and access

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

Community listingLocal stdioSource reviewed; not executedPublished by Forum Labs

Vendor documentation

What you can do with it

Automate payments for AI agent web fetches
Enforce per-call and per-day spending caps
Manage host allow and deny lists
Generate append-only payment receipts

Source and maintenance

Community listingRegistry 1.0.0

mcp-registry: io.github.forum-labs/payfetch@1.0.0 Source repository

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

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

@forum-labs/payfetch 1.0.0

npm

@forum-labs/payfetch package definition

{
  "version": "1.0.0",
  "transport": "stdio",
  "identifier": "@forum-labs/payfetch",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "PAYFETCH_PRIVATE_KEY",
      "format": "string",
      "description": "0x-hex EVM private key for a DEDICATED low-balance wallet. Set exactly ONE signer source."
    },
    {
      "name": "PAYFETCH_KEY_FILE",
      "format": "string",
      "description": "Path to a chmod-600 file holding a 0x-hex key (signer alt)."
    },
    {
      "name": "PAYFETCH_CDP_API_KEY_ID",
      "format": "string",
      "description": "Coinbase CDP server-wallet key id (YOUR account)."
    },
    {
      "name": "PAYFETCH_CDP_API_KEY_SECRET",
      "format": "string",
      "description": "Coinbase CDP API key secret."
    },
    {
      "name": "PAYFETCH_CDP_WALLET_SECRET",
      "format": "string",
      "description": "Coinbase CDP wallet secret."
    },
    {
      "name": "PAYFETCH_CDP_ACCOUNT_NAME",
      "format": "string",
      "description": "Optional named CDP EVM account."
    },
    {
      "name": "PAYFETCH_DATA_DIR",
      "format": "string",
      "description": "Ledger/state/config root. Default ~/.payfetch."
    },
    {
      "name": "PAYFETCH_TEST_MODE",
      "format": "string",
      "description": "Any value -> receipts test:true, Base mainnet refused (Sepolia only)."
    },
    {
      "name": "PAYFETCH_APPROVER",
      "format": "string",
      "description": "Set to 1 to grant approval authority (never with a queue-capable mode)."
    },
    {
      "name": "PAYFETCH_VIA",
      "format": "string",
      "description": "Optional via= attribution slug sent on guard calls only."
    }
  ]
}

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.

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Cursor

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

Cursor configuration

{
  "mcpServers": {
    "payfetch-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@forum-labs/payfetch@1.0.0"
      ],
      "env": {
        "PAYFETCH_PRIVATE_KEY": "<YOUR_PAYFETCH_PRIVATE_KEY>",
        "PAYFETCH_KEY_FILE": "<YOUR_PAYFETCH_KEY_FILE>",
        "PAYFETCH_CDP_API_KEY_ID": "<YOUR_PAYFETCH_CDP_API_KEY_ID>",
        "PAYFETCH_CDP_API_KEY_SECRET": "<YOUR_PAYFETCH_CDP_API_KEY_SECRET>",
        "PAYFETCH_CDP_WALLET_SECRET": "<YOUR_PAYFETCH_CDP_WALLET_SECRET>",
        "PAYFETCH_CDP_ACCOUNT_NAME": "<YOUR_PAYFETCH_CDP_ACCOUNT_NAME>",
        "PAYFETCH_DATA_DIR": "<YOUR_PAYFETCH_DATA_DIR>",
        "PAYFETCH_TEST_MODE": "<YOUR_PAYFETCH_TEST_MODE>",
        "PAYFETCH_APPROVER": "<YOUR_PAYFETCH_APPROVER>",
        "PAYFETCH_VIA": "<YOUR_PAYFETCH_VIA>"
      }
    }
  }
}

Cline

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

Cline configuration

{
  "mcpServers": {
    "payfetch-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@forum-labs/payfetch@1.0.0"
      ],
      "env": {
        "PAYFETCH_PRIVATE_KEY": "<YOUR_PAYFETCH_PRIVATE_KEY>",
        "PAYFETCH_KEY_FILE": "<YOUR_PAYFETCH_KEY_FILE>",
        "PAYFETCH_CDP_API_KEY_ID": "<YOUR_PAYFETCH_CDP_API_KEY_ID>",
        "PAYFETCH_CDP_API_KEY_SECRET": "<YOUR_PAYFETCH_CDP_API_KEY_SECRET>",
        "PAYFETCH_CDP_WALLET_SECRET": "<YOUR_PAYFETCH_CDP_WALLET_SECRET>",
        "PAYFETCH_CDP_ACCOUNT_NAME": "<YOUR_PAYFETCH_CDP_ACCOUNT_NAME>",
        "PAYFETCH_DATA_DIR": "<YOUR_PAYFETCH_DATA_DIR>",
        "PAYFETCH_TEST_MODE": "<YOUR_PAYFETCH_TEST_MODE>",
        "PAYFETCH_APPROVER": "<YOUR_PAYFETCH_APPROVER>",
        "PAYFETCH_VIA": "<YOUR_PAYFETCH_VIA>"
      }
    }
  }
}

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": {
    "payfetch-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@forum-labs/payfetch@1.0.0"
      ],
      "env": {
        "PAYFETCH_PRIVATE_KEY": "<YOUR_PAYFETCH_PRIVATE_KEY>",
        "PAYFETCH_KEY_FILE": "<YOUR_PAYFETCH_KEY_FILE>",
        "PAYFETCH_CDP_API_KEY_ID": "<YOUR_PAYFETCH_CDP_API_KEY_ID>",
        "PAYFETCH_CDP_API_KEY_SECRET": "<YOUR_PAYFETCH_CDP_API_KEY_SECRET>",
        "PAYFETCH_CDP_WALLET_SECRET": "<YOUR_PAYFETCH_CDP_WALLET_SECRET>",
        "PAYFETCH_CDP_ACCOUNT_NAME": "<YOUR_PAYFETCH_CDP_ACCOUNT_NAME>",
        "PAYFETCH_DATA_DIR": "<YOUR_PAYFETCH_DATA_DIR>",
        "PAYFETCH_TEST_MODE": "<YOUR_PAYFETCH_TEST_MODE>",
        "PAYFETCH_APPROVER": "<YOUR_PAYFETCH_APPROVER>",
        "PAYFETCH_VIA": "<YOUR_PAYFETCH_VIA>"
      }
    }
  }
}

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": {
    "payfetch-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@forum-labs/payfetch@1.0.0"
      ],
      "env": {
        "PAYFETCH_PRIVATE_KEY": "<YOUR_PAYFETCH_PRIVATE_KEY>",
        "PAYFETCH_KEY_FILE": "<YOUR_PAYFETCH_KEY_FILE>",
        "PAYFETCH_CDP_API_KEY_ID": "<YOUR_PAYFETCH_CDP_API_KEY_ID>",
        "PAYFETCH_CDP_API_KEY_SECRET": "<YOUR_PAYFETCH_CDP_API_KEY_SECRET>",
        "PAYFETCH_CDP_WALLET_SECRET": "<YOUR_PAYFETCH_CDP_WALLET_SECRET>",
        "PAYFETCH_CDP_ACCOUNT_NAME": "<YOUR_PAYFETCH_CDP_ACCOUNT_NAME>",
        "PAYFETCH_DATA_DIR": "<YOUR_PAYFETCH_DATA_DIR>",
        "PAYFETCH_TEST_MODE": "<YOUR_PAYFETCH_TEST_MODE>",
        "PAYFETCH_APPROVER": "<YOUR_PAYFETCH_APPROVER>",
        "PAYFETCH_VIA": "<YOUR_PAYFETCH_VIA>"
      }
    }
  }
}

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