PayAPI Market

5 new verified APIs on PayAPI Market

By · Published 2026-09-16 · Last updated September 16, 2026 · 2 min read

Since 13 Sep we paid to verify more APIs. Here are five of them.

What "verified" means here

We do not take a provider's word for it. For every API on this list we sent a real payment in USDC on Base, from our own wallet, and checked that the response contained genuine data.

Each check uses an input the provider did not advertise, so a canned example response cannot pass. Where the underlying data is public, we compare the paid response against the original source field by field.

The APIs

Agent Receipt Audit

Audits an agent earning ledger for overcounted revenue, x402 paid, USDC on Base. Verified route: POST /v1/audit at $0.01, taking {entries} of 1 to 500 earning and cost rows and returning a verdict, a summary of claimed versus evidence-backed revenue, an overcount figure, and per-row findings with severities.

  • Provider: InstinctWorker
  • Price: $0.01 per request
  • Verified route: POST /v1/audit
  • Settlement: 0xe6850e6c9b86… on Base

NeuroDynamic Audio and LLM APIs

Text to speech, transcription, voice cloning and uncensored LLM completions for AI agents, x402 paid, USDC on Base. Verified route: POST /v1/audio/speech at $0.005, taking {input, voice} and returning MP3 audio.

  • Provider: neurodynamic.tech
  • Price: $0.005 to $0.05 per request
  • Verified route: POST /v1/audio/speech
  • Settlement: 0x31be07d14ddb… on Base

Sharvora Intelligence

Intelligence and research endpoints for AI agents, x402 paid, USDC on Base. Verified route: GET /api/v1/service-proof at $0.001, the low-cost end-to-end delivery canary the provider recommends running before higher-value calls.

  • Provider: Sharvora Intelligence
  • Price: $0.001 to $0.15 per request
  • Verified route: GET /api/v1/service-proof
  • Settlement: 0x99953666e871… on Base

x402 Inspector

Scans a URL for an x402 payment challenge and reports whether the challenge is valid, invalid, malformed or absent, with evidence, warnings and the parsed accepts. x402 paid, $0.02 USDC on Base per call.

  • Provider: ContextIQ
  • Price: $0.02 per request
  • Verified route: POST /api/v1/x402-inspector/x402-v2
  • Settlement: 0xa4ce1d02fae6… on Base

Tradebot Risk & Integrity API

Read-only pre-trade and market-data integrity checks for autonomous crypto agents, x402 paid, USDC on Base. Verified route: POST /v1/pre-trade-execution-gate at $0.02, which scores a caller-supplied visible order book for execution admissibility and returns PASS, CAUTION or AVOID with fill ratio, slippage, spread, visible depth and depth utilization.

  • Provider: Tomasz Czuba
  • Price: $0.01 to $0.02 per request
  • Verified route: POST /v1/pre-trade-execution-gate
  • Settlement: 0x22db04530768… on Base

How an agent finds these

Every verified API is queryable as JSON. An agent does not need to read this post, or the website, to find them.

curl "https://payapi.market/agent/list"
curl "https://payapi.market/agent/search?q=property"

Those endpoints return only live listings, and by default only ones we have paid to verify.

The current catalogue

PayAPI Market lists 170 live APIs, of which 153 are settlement-verified, across 5 categories: Data, Finance, Intelligence, Tools, Verification.