# CanonicalHash

> Deterministic JSON hashing, structured extraction, and EIP-712 verifiable action receipts for AI agents.

## About
CanonicalHash provides infrastructure for the agent economy. It ensures identical JSON payloads always produce the same cryptographic hash (RFC 8785) and returns an EIP-712 signed attestation.

## Products / Services
- [Canonicalize](https://canonicalhash-production.up.railway.app/v1/canonicalize): Hash and sign JSON ($0.002).
- [Batch Canonicalize](https://canonicalhash-production.up.railway.app/v1/canonicalize/batch): Hash up to 1,000 payloads ($0.01).
- [Action Receipts](https://canonicalhash-production.up.railway.app/v1/receipt): Tamper-evident audit trails ($0.001).
- [Structured Extraction](https://canonicalhash-production.up.railway.app/v1/structure/paid): Extract JSON from text ($0.005).
- [Verify Attestation](https://canonicalhash-production.up.railway.app/v1/verify): Free EIP-712 signature recovery.

## Resources
- [OpenAPI Spec](https://canonicalhash-production.up.railway.app/openapi.json)
- [MCP Server](https://canonicalhash-production.up.railway.app/mcp)
- [Agent Manifest](https://canonicalhash-production.up.railway.app/agents.json)

## Pricing
Pay-per-call via x402 on Base or Solana. Verification is always free.

## Contact
- [Privacy Policy](https://canonicalhash-production.up.railway.app/privacy)
- [Terms of Service](https://canonicalhash-production.up.railway.app/terms)
- [Email](mailto:anwarinowac@gmail.com)