# NobleProofs Terminal
> Precision acoustic resonance and STARK zero-knowledge bullion verification.

## Core Capabilities
- **Acoustic Ring Test**: Analyzes high-frequency resonant modes (18.6kHz) to verify physical density without destructive drilling or acid testing.
- **M31 STARK Attestation**: Mints irreversible cryptographic certificates on the prime field p = 2^64 - 2^32 + 1.
- **Offline PWA Vault**: Air-gapped AES-256 client storage for precious metals portfolios.

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