secondopinionx402.com

5 agent-payable APIs. Every listing carries a tested call recipe - endpoint, auth shape, pricing, and known gotchas - on its detail page. secondopinionx402.com ↗

API	Category	Price / call	Uptime 30d	Status	Docs
Second Opinion (async) API Second Opinion (async): pay, receive a job id in seconds, poll the free result URL for the verdict. Same product as /v1/verify; required for Solana payments, kinder for all rails.	-	$0.20	-	listed	call recipe →
Second Opinion API Second Opinion: an independent adversarial agent attempts to refute your claim (live web research) and returns a structured verdict with citations.	-	$200,000.00	-	listed	call recipe →
Second Opinion Panel API Second Opinion panel: three independent skeptics attack the claim via different lenses (evidence, logic, currency). Majority verdict with per-seat breakdown.	-	$750,000.00	-	listed	call recipe →
Second Opinion Quick (async) API Second Opinion quick (async): reasoning-only check as a polled job. Required for Solana payments.	-	$0.02	-	listed	call recipe →
Second Opinion Quick API Second Opinion quick: an independent reasoning-only check (no web research) of your claim's logic and consistency with established knowledge. Honest 'inconclusive' when the claim needs live research.	-	$0.02	-	listed	call recipe →

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