x402 Payment Request Parser MCP Server

Install x402 Payment Request Parser MCP server

claude mcp add --transport http x402-safety-kit https://x402-safety-kit-production.mk-career-planning.workers.dev/mcp

{
  "mcpServers": {
    "x402-safety-kit": {
      "url": "https://x402-safety-kit-production.mk-career-planning.workers.dev/mcp"
    }
  }
}

{
  "mcpServers": {
    "x402-safety-kit": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://x402-safety-kit-production.mk-career-planning.workers.dev/mcp"
      ]
    }
  }
}

{
  "servers": {
    "x402-safety-kit": {
      "type": "http",
      "url": "https://x402-safety-kit-production.mk-career-planning.workers.dev/mcp"
    }
  }
}

{
  "mcpServers": {
    "x402-safety-kit": {
      "serverUrl": "https://x402-safety-kit-production.mk-career-planning.workers.dev/mcp"
    }
  }
}

Context tax

Connecting this server adds ~572 tokens of tool definitions to every model turn (lean, 4 tools). Measured 2026-10-19 via its hosted endpoint; o200k tokenizer, worst case for clients that load all tools up front. How we measure

Input prices as of 2026-10-06. Excludes your own prompt and output.

Tools (4)

• x402_parse_payment_request289 tok

  Free. Decode one x402 v2 payment request (base64 PAYMENT-REQUIRED header, PaymentRequired JSON or MCP tool result) and list every accepts option with exact atomic and decimal amounts. Token addresses are compared with a limited reference list. status: parsed, ambiguous (options differ in recipient, network or amount; none is chosen), malformed or unsupported. Does not verify the merchant, authorize a transfer, assess fraud risk, or guarantee any payment. URLs in the input are never fetched.

• get_receipt128 tok

  Re-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept for 90 days after settlement.

• x402_known_assets100 tok

  Free. The limited reference list this server compares token addresses with: known assets (network, contract, symbol, decimals) with sources and check dates, known CAIP-2 networks, scheme names from the x402 specs, and payment flows. A table match is not proof that an asset or a merchant is genuine.

• catalog53 tok

  List the tools of this server with prices, data sources, licensing, daily limits and data freshness.

Freshness

Active — last maintenance signal 2d ago. The newest of the signals below sets the band.

1. Last commit (default branch)

   no data · GitHub

2. Latest release

   no data · GitHub

3. Package published

   no data · npm/PyPI

4. Registry entry updated

   2026-10-17 · 2d ago · official registry · v0.1.0

How it compares in Finance & Fintech

Against the most-starred finance & fintech servers we index. Token cost is per model turn, measured from each server's live tool list.