x402 paying-fetch client for AI agents. Spending caps, approval, receipts. Non-custodial.
To add payfetch to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 10 environment variables, listed below.
Install
npx -y @forum-labs/payfetch@1.0.0Environment variables
PAYFETCH_PRIVATE_KEYSet in your MCP configPAYFETCH_KEY_FILESet in your MCP configPAYFETCH_CDP_API_KEY_IDSet in your MCP configPAYFETCH_CDP_API_KEY_SECRETSet in your MCP configPAYFETCH_CDP_WALLET_SECRETSet in your MCP configPAYFETCH_CDP_ACCOUNT_NAMESet in your MCP configPAYFETCH_DATA_DIRSet in your MCP configPAYFETCH_TEST_MODESet in your MCP configPAYFETCH_APPROVERSet in your MCP configPAYFETCH_VIASet in your MCP configInstall with your client
claude mcp add payfetch --env PAYFETCH_PRIVATE_KEY=<YOUR_PAYFETCH_PRIVATE_KEY> --env PAYFETCH_KEY_FILE=<YOUR_PAYFETCH_KEY_FILE> --env PAYFETCH_CDP_API_KEY_ID=<YOUR_PAYFETCH_CDP_API_KEY_ID> --env PAYFETCH_CDP_API_KEY_SECRET=<YOUR_PAYFETCH_CDP_API_KEY_SECRET> --env PAYFETCH_CDP_WALLET_SECRET=<YOUR_PAYFETCH_CDP_WALLET_SECRET> --env PAYFETCH_CDP_ACCOUNT_NAME=<YOUR_PAYFETCH_CDP_ACCOUNT_NAME> --env PAYFETCH_DATA_DIR=<YOUR_PAYFETCH_DATA_DIR> --env PAYFETCH_TEST_MODE=<YOUR_PAYFETCH_TEST_MODE> --env PAYFETCH_APPROVER=<YOUR_PAYFETCH_APPROVER> --env PAYFETCH_VIA=<YOUR_PAYFETCH_VIA> -- npx -y @forum-labs/payfetch@1.0.0
Run this in a terminal to add the server to Claude Code.
What this does
payfetch exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
PAYFETCH_PRIVATE_KEY PAYFETCH_KEY_FILE PAYFETCH_CDP_API_KEY_ID PAYFETCH_CDP_API_KEY_SECRET PAYFETCH_CDP_WALLET_SECRET PAYFETCH_CDP_ACCOUNT_NAME PAYFETCH_DATA_DIR PAYFETCH_TEST_MODE PAYFETCH_APPROVER PAYFETCH_VIA
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install payfetch?
Run the Claude Code command in the install section to add payfetch to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with payfetch?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to payfetch as well.
Does payfetch need an API key?
Yes. Before it can run, set these environment variables: PAYFETCH_PRIVATE_KEY, PAYFETCH_KEY_FILE, PAYFETCH_CDP_API_KEY_ID, PAYFETCH_CDP_API_KEY_SECRET, PAYFETCH_CDP_WALLET_SECRET, PAYFETCH_CDP_ACCOUNT_NAME, PAYFETCH_DATA_DIR, PAYFETCH_TEST_MODE, PAYFETCH_APPROVER, PAYFETCH_VIA. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
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