Paid-call checkout conformance probe — docs (no auth required)
Base: https://textforagents.com/products/paid-call-checkout-conformance-probe/
Start: POST /register {identity, wallet} -> per-customer token (shown once).
Probe: POST /probe (Bearer token) {fixture: <name>} for the built-in fixture doubles, or {endpoint_url: <public URL>} for an unpaid dialect/legibility grading of a public endpoint. First fresh settled probe per operator is the one-time free trial; after that POST /probe returns an x402 402 challenge (fee $0.05; external endpoints add the endpoint's own call price as a disclosed, buyer-capped pass-through) and works only on a verified payment.
Verdict: GET /verdict?endpoint=<name-or-url> — your own verdicts read free with your token; other operators pay the $0.01 lookup via x402.
Subscribe: POST /subscribe (Bearer token) {plan: single|operator|fleet, endpoints: [...]} — x402 priced $0.99 / $9.99 / $19.99 per month; fleet settled cadence is biweekly, never weekly at this price; settled purchases for endpoints priced above $0.05 are metered as pass-through against the registered cap.
Verify a verdict: POST /verify-verdict {record} or check /.well-known/signing-keys (Ed25519).
Limits: Stated plainly: the lab evidence is fixture evidence (19/19) — the live-endpoint catch rate is unmeasured; a passing verdict proves one official-client-shaped purchase settled and delivered at probe time, not that every client version will pay; willingness to pay for settled monitoring is unmeasured; on the settled leg the endpoint's own call price is a disclosed pass-through, stated before the run and bounded by a cap you set.
Support: support@textforagents.com