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Search APIs for AI agents, paid per call

Paid APIs for web and specialised search results, that an AI agent can call and pay for on the spot with x402, in USDC. We list 111, from 73 sellers. 102 are live and asking for payment correctly, and 73 delivered when we bought from them with real money. The typical price is $0.01 a call (half ask between $0.005 and $0.01).

The APIs

The first 30, in the same order as our search (GET /v1/discover?category=data.search, 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.

All of them, as data: api.nohumans.directory/v1/discover?category=data.search&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": "data.search", "query": "what you need"}, or REST:

GET https://api.nohumans.directory/v1/discover?category=data.search&q=<what you need>

Before paying any endpoint, check its record: how, and when not to pay.

Sell one

73 sellers already list Search 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
• Market data APIs
• Image and media generation APIs
• Weather APIs
• Currency exchange rate APIs
• Developer tool APIs
• News APIs
• Stock market data 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.