# SYNTHORA — HERGERT SYNTHORA agent-native APIs

> Machine-payable (x402) compliance, risk and safety APIs for autonomous payment and DeFi agents. Each endpoint takes JSON and returns a signed JSON verdict. You pay per call in USDC on Base — no accounts, no signup, no API keys. Settlement runs over the x402 protocol via the Coinbase CDP facilitator.

How to call any service below:
- Send POST with a JSON body to the /service URL.
- The server answers HTTP 402 (Payment Required) with x402 payment instructions.
- Pay the quoted USDC amount on Base (eip155:8453); retry the request with the X-PAYMENT header. Any x402 client library or an x402-aware agent wallet handles this automatically.

Payment: protocol x402, network eip155:8453 (Base), asset USDC, payTo 0x6D9F318463168fF637b50E5b9a21392e97c7c167.
Discovery per host: /.well-known/x402 (resource list), /.well-known/agent.json (A2A agent card), /openapi.json (OpenAPI 3.1).
Identity: ERC-8004 agentIds 56572 and 56577, registry 0x8004a169fb4a3325136eb29fa0ceb6d2e539a432 on Base.
All services are scoring / analysis only — they return verdicts and never execute, sign or settle trades on your behalf.

## Flagship

- [AgentGuard — Agent Pre-Trade Safety](https://agentguard.hergertsynthora.com/service): One signed call returns a pre-execution risk verdict (SAFE / CAUTION / BLOCK) for a payment or DeFi agent. Combines OFAC / EU / UN / UK sanctions screening + stablecoin peg deviation (bps) + counterparty on-chain signal into one Ed25519-signed attestation. POST JSON {address, chain, counterparty?, stablecoin?}. 0.02 USDC per call. OpenAPI: https://agentguard.hergertsynthora.com/openapi.json — Agent card: https://agentguard.hergertsynthora.com/.well-known/agent.json

## Compliance, risk & security APIs (x402, USDC on Base)

- [DeFiVerdict](https://defiverdict.hergertsynthora.com/service): Risk verdict for a DeFi protocol or pool before you deposit.
- [WalletRep](https://walletrep.hergertsynthora.com/service): Reputation and behaviour signal for an EVM wallet address.
- [AMLScreen](https://amlscreen.hergertsynthora.com/service): Sanctions / AML screening for an address against OFAC, EU, UN and UK lists.
- [Address-Risk](https://address-risk.hergertsynthora.com/service): Composite on-chain risk score for a single EVM address.
- [BridgeRisk](https://bridgerisk.hergertsynthora.com/service): Risk assessment for a cross-chain bridge route or transfer.
- [ContractWatch](https://contractwatch.hergertsynthora.com/service): Smart-contract risk and change signal for a deployed contract.
- [BusinessRisk](https://businessrisk.hergertsynthora.com/service): Counterparty / entity risk signal for a business.
- [BICCheck](https://biccheck.hergertsynthora.com/service): Validation and lookup for bank BIC / SWIFT codes.
- [CodeAudit](https://codeaudit.hergertsynthora.com/service): Automated audit signal for a code or contract snippet.

## Full catalog

- Live x402 catalog (223 services, all payTo the Safe above): https://catalog.hergertsynthora.com/
- Machine-readable catalog JSON: https://catalog.hergertsynthora.com/catalog.json

## Notes for LLMs and developers

- Every /service endpoint is agent-callable today; a human can inspect /openapi.json in a browser but the intended caller is an autonomous agent with an x402 wallet.
- Prices are quoted live in the 402 response — treat the 0.02 USDC above as the AgentGuard price; other services quote their own amount.
- Contact / provider: HERGERT SYNTHORA — https://hergertsynthora.com