# RelicLedger Provenance Registry
> Optical Physical Unclonable Function (PUF) luxury watch & antiquity provenance ledger.

## Core Capabilities
- **Micro-Surface PUF Extraction**: Converts microscopic surface imperfections into an uncloneable 256-bit cryptographic key.
- **STARK Chain-of-Custody**: Irreversible cryptographic transfer logs without public serial exposure.
- **Physical-Digital Vault**: Non-custodial escrow and delivery verification.

## API & Tool Access
- Agent Manifest: https://relicledger.com/.well-known/agent.json
- MCP Schema: https://relicledger.com/.well-known/mcp.json
- OpenAPI: https://relicledger.com/.well-known/openapi.yaml


## AUTONOMOUS AGENT APIS & HTTP 402 MACHINE PAYMENTS
ELTAV LLC exposes high-value programmatic data feeds via native HTTP 402 Payment Required:
1. NobleProofs Bullion Verification: https://nobleproofs.com/api/agent/verify-bullion ($0.05 / 100 sats)
2. RelicLedger Card Valuation: https://relicledger.com/api/agent/card-valuation ($0.03 / 60 sats)
3. Tracteon COI Insurance Audit: https://us-central1-eltav-prod.cloudfunctions.net/tracteonCoiVerify ($0.25 / 500 sats)

Settlement Rails:
- Header: 'X-ELTAV-KEY: eltav_live_sk_...' (Funded via Stripe Checkout at https://eltav.io/?tab=developers)
- Header: 'Authorization: L402 <macaroon>:<preimage>' (Pay invoice returned in 402 WWW-Authenticate header)

Discovery:
- Agent Manifest: https://eltav.io/.well-known/agent-services.json
- OpenAPI Spec: https://eltav.io/openapi.json