AI inference APIs for AI agents, paid per call
Paid APIs for hosted model inference: running AI models on request, that an AI agent can call and pay for on the spot with x402, in USDC. We list 23, from 19 sellers. 23 are live and asking for payment correctly, and 9 delivered when we bought from them with real money. The typical price is $0.02 a call (half ask between $0.006 and $0.05).
The APIs
The first 23, in the same order as our search (GET /v1/discover?category=infra.inference, 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 |
|---|---|---|---|
| BridgeNode — pay-per-request LLM inference (Solana USDC)free samplebridgenode.cc | $0.002 | verified | probes pass; not bought yet |
| GPT-5.6 Terra — balanced frontier LLMfree sampleapi.monpham.work | $0.025 | verified | bought, delivered 2026-08-17 |
| GPT-5.6 Sol — flagship frontier LLMfree sampleapi.monpham.work | $0.06 | verified | probes pass; not bought yet |
| GPT-5.6 Luna — fast low-cost frontier LLMfree sampleapi.monpham.work | $0.003 | verified | bought, delivered 2026-10-30 |
| Agent Exchange — OpenAI-compatible chat $0.002free samplestore.agentexchange.work | $0.002 | verified | probes pass; not bought yet |
| Keyronne — Json Repairkeyronne.com | $0.001 | verified | bought, did not deliver |
| Cheaptokens — Buycheaptokens.ai | $1.00 | verified | probes pass; not bought yet |
| Venice.ai -- Multi-Model LLM Gatewayapi.venice.ai | $0.001 | verified | probes pass; not bought yet |
| NetIntelnetintel.dev | $0.003 | verified | bought, delivered 2026-09-15 |
| BlockRun.AI | $0.006 | verified | bought, delivered 2026-08-17 |
| 2S — Vehicle Vin Decode2s.io | $0.006 | verified | probes pass; not bought yet |
| Api — Decodeapi.vindexapi.dev | $0.01 | verified | probes pass; not bought yet |
| OT Intel API — ICS/SCADA Threat Intelligenceot-intel-api.onrender.com | $0.02 | verified | bought, delivered 2026-08-17 |
| Api — Chat Completionsapi.webbersites.com | $0.05 | verified | probes pass; not bought yet |
| Wintelwintel.canopy.finance | $0.01 | verified | bought, delivered 2026-09-22 |
| GPT-5.6 Luna — fast low-cost frontier LLMx402.monpham.work | $0.003 | verified | bought, delivered 2026-10-30 |
| GPT-5.6 Terra — balanced frontier LLMx402.monpham.work | $0.025 | verified | bought, delivered 2026-09-22 |
| GPT-5.6 Sol — flagship frontier LLMx402.monpham.work | $0.06 | verified | probes pass; not bought yet |
| Deepseek — Chat Completionsdeepseek.x402.press | $0.0025 | verified | probes pass; not bought yet |
| X402 — Image Generatex402.aispace.bot | $0.015 | verified | probes pass; not bought yet |
| Voidfeed — Fact Feed Latestvoidfeed.ai | $0.05 | verified | probes pass; not bought yet |
| Deepgramdeepgram.x402.paysponge.com | $1.00 | verified | probes pass; not bought yet |
| modelprices.xyz — LLM market data for agents | $0.01 | verified | bought, delivered 2026-09-15 |
All of them, as data: api.nohumans.directory/v1/discover?category=infra.inference&limit=50. Live figures, as of 2026-11-07 02:39 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": "infra.inference", "query": "what you need"}, or REST:
GET https://api.nohumans.directory/v1/discover?category=infra.inference&q=<what you need>
Before paying any endpoint, check its record: how, and when not to pay.
Sell one
19 sellers already list AI inference APIs here, at a typical $0.02 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
- Market data 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
- 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.