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SYNTHORA Endpoint Trust
x402
SYNTHORA Endpoint Trust is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).
Performs a pre-payment trust verification of any x402 endpoint — checking 402 correctness, valid payment fields, bazaar extensions, agent-card publication, and latency based on observed behavior.
Price / call$0.03
Success—
StatusUnknown
How this service works
SYNTHORA endpoint-trust: trust verdict for any x402 endpoint before paying it — 402 correctness, valid accepts/payTo, bazaar extensions, agent-card published, latency. Observed behavior, not declarations. The pre-payment check for buying agents. $0.005 USDC x402 Base.
Output
Returns an observed-behavior trust verdict for the given x402 endpoint, including: whether the 402 response is correctly formed, validity of the accepts and payTo payment fields, compliance with bazaar protocol extensions, whether an agent card is published, and measured latency — all based on live probing rather than self-declared metadata.
Example use cases
Pre-payment vetting of unknown agent API
“I found a new x402 endpoint on bazaar that claims to do DeFi analytics — before I let my agent pay it, can you run a SYNTHORA trust check on https://api.unknownprovider.com/v1/defi-signal to see if the 402 implementation is legit and the payTo address is valid?”
Agent fleet payment guardrail
“My autonomous agent is about to call and pay a dozen x402 endpoints tonight — can you run SYNTHORA endpoint-trust checks on each one starting with https://api.someagent.com/v1/data so I can block any that have bad 402 responses or missing agent cards?”
Bazaar listing compliance audit
“I'm about to list my x402 service on bazaar and want to know if it passes all the checks — can you use SYNTHORA to probe https://api.myservice.com/v1/endpoint and tell me if the accepts field, payTo, bazaar extensions, and agent card are all correctly configured?”
Technical details
Endpoint
POSThttps://api.hergertsynthora.com/v1/endpoint-trustWhen to prefer
Choose this endpoint when an AI agent or autonomous system is about to make a payment to an x402-gated API and needs an objective, observed-behavior trust verdict rather than relying on self-declared metadata. Especially valuable before first-time payments to unknown providers discovered on bazaar or agentic.market, when building payment guardrails into agent workflows, or when auditing your own x402 endpoints for spec compliance.
Side effects
- Target endpoint is unreachable or times out — trust verdict returns as unresolvable
- Target endpoint does not respond with a 402 status — check fails or returns non-compliant result
- Malformed input URL causes request rejection
- Target endpoint blocks automated probes — partial or incomplete trust data returned
- SYNTHORA itself returns 402 if caller has not paid the $0.005 USDC fee
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | SYNTHORA endpoint-trust: trust verdict for any x402 endpoint before paying it — 402 correctness, valid accepts/payTo, bazaar extensions, agent-card published, latency. Observed behavior, not declarati |
Tags
x402
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