SettlementWitness MCP

"_ext": { "agent_id": "0x123:demo" } }

- receipt_v0_1is the signed canonical receipt payload used by this implementation
- whencounterpartyis present, it is included in signature scope and inreceipt_idderivation
- legacy receipts (sar-prod-ed25519-01andsar-prod-ed25519-02) remain valid and do not includecounterpartyin signature scope
- this behavior is implemented and publicly verifiable via the live receipt and key endpoints

SAR Compatibility:This implementation follows SAR verification semantics, with an extended signed payload whencounterpartyis present.

Run a full end-to-end verification in ~2 minutes: DEMO.md

Note: use the receipt_id inside receipt_v0_1

cd examples/node-verify node verify.js receipt.json jwks.json

Node.js verification example: examples/node-verify/

Python verification example: examples/verify_receipt_python.py

Usage: python3 examples/verify_receipt_python.py <receipt_id>

Submits a task verification request and returns a signed SAR receipt.

GET /settlement-witness/receipt/{receipt_id}

Note: Use thereceipt_idinsidereceipt_v0_1(sha256:...) for retrieval.

GET /settlement-witness/receipts?wallet={address}

Returns recent receipts associated with a wallet address.

This interface allows browsing recent receipts and wallet-indexed delivery history.

Used to verify Ed25519 signatures for receipts.

Registry of verifier public keys referenced byverifier_kid.

Zen7 Payment Agent is the first implementation project of DePA (Decentralized Payment Agent), pioneers next-generation intelligent payment infrastructure.

Prediction market trading server for GuessMarket. Browse markets, buy/sell shares, add/remove liquidity, check portfolios, and build on-chain transactions. 20+ tools.

First native Solana staking MCP server. 26 tools for complete staking workflows — stake, unstake, withdraw, verify, simulate, and more. Zero custody design, ~6% APY.

Trustless AI task verification and XRPL escrow management — post jobs, verify completions, and release XRP payments automatically via MCP.

Provides tools for interacting with the EDUCHAIN blockchain, including wallet, swap, and arbitrage operations on SailFish DEX.

Independent verification for autonomous agents: pre-trade/pre-action review returning approve/reject verdicts with signed proofs (free /verify-proof), public on-chain-checkable verdict ledger; pay-per-call via Lightning, USDC (x402), or card.

The financial infrastructure for autonomous AI. Equips Claude and other agents with secure, programmable USDC smart accounts (ERC-4337). Tools exposed: get_balance, transfer_usdc, get_history. Features: Abstracted gas fees (Paymasters), native USDC settlement on Base, and strict developer-defined spending limits (Policy-as-Code) to eliminate LLM hallucination liability.

An MCP server for the Osmosis Agent Toolkit, enabling interactions with the Osmosis blockchain.

Multi-chain x402 payment gateway and DeFi automation MCP server. 161 tools across 39 categories — batch payments, token swaps, bridges, escrow, AI inference, staking, governance, oracles, geospatial, GPU compute, research, and more. Supports Base, Ethereum, and Solana with 10+ additional chains. Integrated into AWS Strands Agents tools and Google ADK Community Toolkit.