Market data APIs for AI agents, paid per call
Paid APIs for prices, quotes and signals for financial and crypto markets, that an AI agent can call and pay for on the spot with x402, in USDC. We list 405, from 177 sellers. 364 are live and asking for payment correctly, and 184 delivered when we bought from them with real money. The typical price is $0.01 a call (half ask between $0.004 and $0.024).
The APIs
The first 30, in the same order as our search (GET /v1/discover?category=data.markets, testnets left out): verified first, then probe score, then price.
Nobody can pay for a place here. Each name opens the full record: every check, every purchase, with dates.
| API | price | status | when we bought |
|---|---|---|---|
| Catalyst Desk – Polymarket moversfree samplecatalyst-desk.catalystdesk.workers.dev | $0.02 | verified | probes pass; not bought yet |
| Catalyst Desk – daily prediction-market brieffree samplecatalyst-desk.catalystdesk.workers.dev | $0.1 | verified | probes pass; not bought yet |
| Agent Embassy: GPU compute spot pricesfree sampleagent-embassy.fly.dev | $0.25 | verified | probes pass; not bought yet |
| P0 Agent Economy Index — networksfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.001 | verified | bought, delivered 2026-09-25 |
| P0 Agent Economy Index — countfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.001 | verified | bought, delivered 2026-09-25 |
| P0 Agent Economy Index — tagsfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.001 | verified | bought, delivered 2026-09-25 |
| P0 Agent Economy Index — topfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.002 | verified | bought, delivered 2026-09-25 |
| P0 Agent Economy Index — servicefree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.002 | verified | bought, delivered 2026-09-25 |
| P0 Agent Economy Index — in-aifree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.008 | verified | bought, delivered 2026-09-22 |
| P0 Agent Economy Index — in-securityfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.008 | verified | bought, delivered 2026-09-22 |
| corpusAI GPU index fixingfree samplecloud.trycorpus.ai | $0.01 | verified | bought, delivered 2026-10-19 |
| corpusAI GPU rental quotesfree samplecloud.trycorpus.ai | $0.01 | verified | bought, delivered 2026-10-19 |
| corpusAI cloud spot price eventsfree samplecloud.trycorpus.ai | $0.01 | verified | bought, delivered 2026-10-19 |
| P0 Agent Economy Index — reportfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.02 | verified | probes pass; not bought yet |
| P0 Agent Economy Index — sellerfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.025 | verified | bought, delivered 2026-09-22 |
| P0 Agent Economy Index — datasetfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.031 | verified | probes pass; not bought yet |
| P0 Agent Economy Index — in-defifree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.032 | verified | bought, delivered 2026-09-22 |
| P0 Agent Economy Index — pricefree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.04 | verified | probes pass; not bought yet |
| corpusAI GPU capacity stressfree samplecloud.trycorpus.ai | $0.01 | verified | bought, delivered 2026-10-19 |
| P0 Agent Economy Index — alphafree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.05 | verified | probes pass; not bought yet |
| Polymarket Live Prediction Market Odds & Implied Probability Feed (polymarket-o…free samplepolymarket-odds-72343955726.us-central1.run.app | $0.01 | verified | bought, delivered 2026-10-30 |
| P0 Agent Economy Index — in-onchainfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.032 | verified | bought, delivered 2026-09-22 |
| P0 Agent Economy Index — tokenfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.04 | verified | probes pass; not bought yet |
| corpusAI LLM token price fixingfree samplecloud.trycorpus.ai | $0.01 | verified | bought, delivered 2026-10-19 |
| P0 Agent Economy Index — searchfree samplex402-bazaar-rank.x402-bazaar-rank-worker.workers.dev | $0.04 | verified | probes pass; not bought yet |
| BlindOracle — oracle.historical-analysisfree sampleapi.craigmbrown.com | $0.08 | verified | probes pass; not bought yet |
| market.memoryapi.org/x402/market/arbitrage | $0.001 | verified | bought, delivered 2026-09-08 |
| ozmium.org/v1/stocks | $0.001 | verified | bought, delivered 2026-10-06 |
| x402.ottoai.services/stock-pools | $0.001 | verified | bought, delivered 2026-10-06 |
| intel.degenscan.io/v1/hl/markets | $0.001 | verified | bought, delivered 2026-10-11 |
All of them, as data: api.nohumans.directory/v1/discover?category=data.markets&limit=50. Live figures, as of 2026-11-07 02:27 UTC.
For agents
Search this kind of API from your agent, free, no key. MCP server https://api.nohumans.directory/mcp, tool
find_paid_service with {"category": "data.markets", "query": "what you need"}, or REST:
GET https://api.nohumans.directory/v1/discover?category=data.markets&q=<what you need>
Before paying any endpoint, check its record: how, and when not to pay.
Sell one
177 sellers already list Market data APIs here, at a typical $0.01 a call. Agents choose on evidence: a free sample, inputs they can read, and a purchase that delivered. Check yours free and list it · what x402 APIs charge and earn · build one with one prompt.
Other kinds of API
- Crypto data APIs
- Web data APIs
- LLM APIs
- Geolocation and maps APIs
- Image and media generation APIs
- Weather APIs
- Currency exchange rate APIs
- Developer tool APIs
- News APIs
- Stock market data APIs
- Search APIs
- Intelligence and analysis APIs
- DeFi data APIs
- Derivatives and funding rate APIs
- Validation APIs
- Macroeconomic data APIs
- Social media data APIs
- On-chain data APIs
- Verification APIs
- GitHub data APIs
- AI inference APIs
- Web scraping APIs
- Research data APIs
Figures count active listings on mainnet, tunnels and testnets excluded; prices are the live payment requests of verified listings on Base. Records are dated evidence about how an endpoint behaved, not a guarantee. How we check.