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x402 Payment Request Parser

Working · 3.0 s

io.github.mk-career-planning/x402-safety-kitv0.1.0

x402 payment-request parser with a limited token list. Does not sign, approve or judge payments.

Utilities

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Call this server's tools from your browser. Nothing to install.

https://x402-safety-kit-production.mk-career-planning.workers.dev/mcp

Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.

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

This tool takes no arguments.

Tools

x402 Payment Request Parser MCP server | mcptry

catalog

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

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}

get_receipt

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.

read-only

Argument	Type	Description
receipt_id*	string	The receipt_id returned with a paid result ("rcpt_" + 64 hex characters).

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "receipt_id"
  ],
  "properties": {
    "receipt_id": {
      "type": "string",
      "maxLength": 80,
      "minLength": 1,
      "description": "The receipt_id returned with a paid result (\"rcpt_\" + 64 hex characters)."
    }
  }
}

x402_known_assets

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.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}

x402_parse_payment_request

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.

read-only

Argument	Type	Description
raw*	any	The payment request. A string: the base64 PAYMENT-REQUIRED header value (a leading 'PAYMENT-REQUIRED:' is allowed) or JSON text. An object: the PaymentRequired JSON, or for transport mcp the tool result (structuredContent, _meta x402/error or content[0].text).
transport	string	Where the request came from: http (402 response) or mcp (paid tool result). Default http.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "raw"
  ],
  "properties": {
    "raw": {
      "anyOf": [
        {
          "type": "string",
          "maxLength": 90000,
          "minLength": 1
        },
        {
          "type": "object",
          "propertyNames": {
            "type": "string"
          },
          "additionalProperties": {}
        }
      ],
      "description": "The payment request. A string: the base64 PAYMENT-REQUIRED header value (a leading 'PAYMENT-REQUIRED:' is allowed) or JSON text. An object: the PaymentRequired JSON, or for transport mcp the tool result (structuredContent, _meta x402/error or content[0].text)."
    },
    "transport": {
      "enum": [
        "http",
        "mcp"
      ],
      "type": "string",
      "default": "http",
      "description": "Where the request came from: http (402 response) or mcp (paid tool result). Default http."
    }
  }
}