# ReceiptRail — delivery receipts for the agent economy (formerly "AgentToll Receipts")

> On-chain delivery receipts for x402 transactions on Solana. Hash-locked, escrow-grade, independently verifiable by anyone, offline, forever.

## What this service does

- [Issue receipt](https://agenttoll-receipts.app.workbuddy.host/v1/receipt): POST a SHA-256 digest of delivered content + x402 settlement reference → permanent Solana receipt. 0.001 USDC via x402, no API key, wallet is identity.
- [Verify receipt](https://agenttoll-receipts.app.workbuddy.host/v1/receipt/<id>): GET C1–C5 verification results (contract match, deliverable match, tamper detection, timing, amount) for any receipt. Fully offline verification also possible against Solana RPC.
- Founding sellers (first 10): free for 30 days.

## Key facts

- Chain: Solana (devnet during rollout, mainnet-beta at GA), settlement in USDC, x402 native.
- MCP endpoint: https://agenttoll-receipts.app.workbuddy.host/mcp (streamable-http; tools: issue_receipt, verify_receipt, get_receipt).
- Official MCP Registry: `io.github.xka0085-byte/receiptrail`.
- Open standard: implements the public [x402-receipts-draft spec](https://github.com/xka0085-byte/agenttoll/blob/master/docs/specs/x402-receipts-draft.md).
- Difference vs app-layer signed receipts: anchored on-chain, rules hash-locked, no trust in the issuer required.
- Agent Card: `/.well-known/agent-card.json`.
- Human contact: Telegram @EidonZe.

## Docs

- [Spec draft (English)](https://github.com/xka0085-byte/agenttoll/blob/master/docs/specs/x402-receipts-draft.md)
- [Pricing page](https://agenttoll-receipts.app.workbuddy.host/)
- [SKILL.md](https://agenttoll-receipts.app.workbuddy.host/SKILL.md)