# Triple Arbiter

> x402 settlement facilitator + EAS-compatible threat-intel attestation issuer on Base mainnet. Non-custodial, opt-in, agent-first.

## What

Five services for AI agents that need to move USDC, quote swaps, or verify prompt/tool safety:

1. **x402 Facilitator** — verify + broadcast EIP-3009 signed USDC authorizations. 50 bps fee on settlement. Minimum $2 per transfer.
2. **EAS Attestation Issuer** — pay-per-query signed attestations over security scans. 3 schemas:
   - `adversarial` — CAF v1.4 (180+ adversarial-prompt patterns)
   - `mcp-shadow` — Couliano phantasm audit (MCP tool description/execution divergence)
   - `esoteric` — L13 esoteric-hybrid signature scan (Chaos Magic / Alchemy / Kabbalah / Gurdjieff / Sufi / Enochian)
3. **0x Swap proxy** — `GET /zerox/quote` — returns 0x v2 monetized quote with 50 bps integrator fee pre-baked. Agents call without their own 0x API key.
4. **Relay cross-chain proxy** — `GET /relay/quote` — returns Relay router quote with 30 bps app fee baked in. Single-tx cross-chain settlement.
5. **KyberSwap aggregator proxy** — `GET /kyber/quote` — returns KyberSwap route with 30 bps extraFee baked in. 14-chain coverage.
6. **Mayan cross-chain proxy** — `POST /mayan/quote` — cross-chain (ETH/Arb/Op/Poly/BSC/Avax → Base) via Mayan Swift with 25 bps referrer baked in.

## Why an agent should use this

- Standardized x402 integration — zero vendor lock-in
- Non-custodial settlement (peer-to-peer, we verify + broadcast only)
- Signed attestations can be presented as proof in audit/compliance flows
- Unique coverage of esoteric-framing attack surface not indexed by other safety services

## Endpoints

- Facilitator: https://mardi-worldwide-sacred-model.trycloudflare.com
- Attestation: https://reward-priority-delete-pricing.trycloudflare.com
- Swap proxy 0x: https://mardi-worldwide-sacred-model.trycloudflare.com/zerox/quote
- Swap proxy Relay: https://mardi-worldwide-sacred-model.trycloudflare.com/relay/quote
- Swap proxy Kyber: https://mardi-worldwide-sacred-model.trycloudflare.com/kyber/quote
- Cross-chain Mayan: https://mardi-worldwide-sacred-model.trycloudflare.com/mayan/quote
- Discovery: https://mardi-worldwide-sacred-model.trycloudflare.com/discovery/resources
- AgentCard (A2A): https://mardi-worldwide-sacred-model.trycloudflare.com/.well-known/agent-card.json
- x402 manifest: https://mardi-worldwide-sacred-model.trycloudflare.com/.well-known/x402-facilitator.json
- MCP manifest: https://mardi-worldwide-sacred-model.trycloudflare.com/.well-known/mcp.json
- Issuer rotation: https://mardi-worldwide-sacred-model.trycloudflare.com/.well-known/attestation-issuer.json (active + deprecated keys — check before trusting any cached attestation)

## Payment

- Network: Base mainnet (chainId 8453)
- Asset: USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)
- PayTo: 0xbe5df0394dbd9cc19127cf93cd9b543f2eb63b97
- Scheme: x402 (EIP-3009 transferWithAuthorization)

## Pricing

- Facilitator fee: 50 bps (0.5%) on each settlement
- Attestation basic: $0.01 per query
- Attestation detailed: $0.10 per query
- Attestation anchored (on-chain EAS): $0.50 per query

## Example client code

```python
# 1. Agent signs EIP-3009 authorization to pay 0xbe5df0394dbd9cc19127cf93cd9b543f2eb63b97 $0.01 USDC
# 2. Agent POSTs authorization to https://mardi-worldwide-sacred-model.trycloudflare.com/verify → receives verify_token
# 3. Agent POSTs {authorization, verify_token} to https://mardi-worldwide-sacred-model.trycloudflare.com/settle → receives tx_hash
# 4. Agent POSTs scan request to https://reward-priority-delete-pricing.trycloudflare.com/query with header:
#    x-facilitator-settled: <tx_hash>
#    body: {"schema_uid": "adversarial", "scan_text": "..."}
# 5. Agent receives EIP-712-signed attestation
```

## Legal / scope

- Opt-in only (client submits authorization = opt-in)
- 90-day log retention, no PII collected
- Not a custodian — USDC settles peer-to-peer
- Fee schedule public at /fees, ToS at /tos

## Source

- Version: 2026-04-19-v1
- Chain: Base mainnet (8453)
- Operator: pseudonymous Base wallet 0xbe5df0394dbd9cc19127cf93cd9b543f2eb63b97