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xrpl-mpp-mcp

Framework-neutral implementation of the native MPP JSON-RPC/MCP payment transport.

pip install xrpl-mpp-mcp

The package provides capability advertisement; root and MCP-nested _meta handling; operation-bound challenges and request hashes; replay-safe callback processing; successful receipt metadata; and the exact payment error mapping:

  • -32042 payment required
  • -32043 verification failed
  • -32602 malformed credential
  • -32603 processor failure

Paid operations are tools/call, resources/read, and prompts/get. Credentials use org.paymentauth/credential; receipts use org.paymentauth/receipt. Conflicting metadata placement is rejected and paid notifications that cannot receive a response are dropped.

This package is not an MCP server framework and does not settle XRPL payments by itself. Inject application verification and settlement callbacks.

Documentation: https://lgcarrier.github.io/xrpl-mpp-stack/packages/mcp/

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