46 APIs you can call right now and pay per request in USDC on Base via the x402 protocol. No signup, no API key, no subscription. Every endpoint includes a free daily trial. Built for autonomous agents: machine-readable llms.txt, OpenAPI specs, and x402 discovery on every route.
How it works: your agent sends an HTTP request → gets a 402 with the USDC price → signs the payment → retries with payment proof → gets the data. The facilitator settles on-chain.
$0.20/call USDC
13F hedge-fund holdings with AI summary: pay-per-call API for AI agents. $0.20 USDC on Base via x402. No signup, no API key.
$0.004/call USDC
Search academic papers with abstracts and citations: pay-per-call API for AI agents. $0.004 USDC on Base via x402. No signup, no API key.
$0.008/call USDC
Recommend the right API for your agent's task: pay-per-call API for AI agents. $0.008 USDC on Base via x402. No signup, no API key.
$0.01/call USDC
Hỏi đáp nông nghiệp tiếng Việt + tóm tắt AI: pay-per-call API for AI agents. $0.01 USDC on Base via x402. No signup, no API key.
$0.015/call USDC
Web search with AI-generated summaries: pay-per-call API for AI agents. $0.015 USDC on Base via x402. No signup, no API key.
$0.015/call USDC
AI verdict: structured analysis on any topic: pay-per-call API for AI agents. $0.015 USDC on Base via x402. No signup, no API key.
$0.75/call USDC
Pre-payment safety check for crypto wallets: AML/KYT screening + address-poisoning detection. Pay-per-call API for AI agents. $0.75 USDC on Base via x
$0.002/call USDC
Read ERC20 balances and EVM chain data: pay-per-call API for AI agents. $0.002 USDC on Base via x402. No signup, no API key.
$0.002/call USDC
Check balances, transactions, and gas on Base + Ethereum: pay-per-call API for AI agents. $0.002 USDC on Base via x402. No signup, no API key.
$1.50/call USDC
AI smart contract audit: vulnerability scan: pay-per-call API for AI agents. $1.50 USDC on Base via x402. No signup, no API key.
$0.0008/call USDC
DeFi token intelligence: TVL, yields, and protocol data: pay-per-call API for AI agents. $0.0008 USDC on Base via x402. No signup, no API key.
$0.001/call USDC
Live DeFi yield rates across protocols: pay-per-call API for AI agents. $0.001 USDC on Base via x402. No signup, no API key.
$0.005/call USDC
DNS and WHOIS lookup for any domain: pay-per-call API for AI agents. $0.005 USDC on Base via x402. No signup, no API key.
$0.03/call USDC
Tra cứu doanh nghiệp Việt Nam theo MST/tên: pay-per-call API for AI agents. $0.03 USDC on Base via x402. No signup, no API key.
$0.30/call USDC
Document AI: PDF/image to structured JSON: pay-per-call API for AI agents. $0.30 USDC on Base via x402. No signup, no API key.
$0.50/call USDC
Earnings prep pack: date, consensus, AI preview: pay-per-call API for AI agents. $0.50 USDC on Base via x402. No signup, no API key.
$0.02/call USDC
Company profile from any domain: homepage metadata, DNS, WHOIS, SEC EDGAR: pay-per-call API for AI agents. $0.02 USDC on Base via x402. No signup, no
$0.0008/call USDC
Foreign exchange rates for 160+ currencies: pay-per-call API for AI agents. $0.0008 USDC on Base via x402. No signup, no API key.
$0.001/call USDC
Live Base and Ethereum gas prices: pay-per-call API for AI agents. $0.001 USDC on Base via x402. No signup, no API key.
$0.05/call USDC
Vietnam farm-gate & wholesale crop prices, updated daily: pay-per-call API for AI agents. $0.05 USDC on Base via x402. No signup, no API key.
$1.00/call USDC
Rent a spot GPU per job — pay USDC, get SSH: pay-per-call API for AI agents. $1.00 USDC on Base via x402. No signup, no API key.
$0.10/call USDC
Cheapest verified rentable GPU spot prices (RTX 3090/4090/3080, A100, H100) from Vast.ai: pay-per-call API for AI agents. $0.10 USDC on Base via x402.
see page USDC
Browse 44 pay-per-call APIs for AI agents: web search, token prices, DeFi yields, SEC filings, GPU spot prices, AML screening and more. Pay USDC on Ba
$0.01/call USDC
Multilingual knowledge search over 2,400 curated chunks: pay-per-call API for AI agents. $0.01 USDC on Base via x402. No signup, no API key.
$0.01/call USDC
Multilingual knowledge search over 2,400 curated chunks: pay-per-call API for AI agents. $0.01 USDC on Base via x402. No signup, no API key.
$0.002/call USDC
Key macroeconomic indicators: pay-per-call API for AI agents. $0.002 USDC on Base via x402. No signup, no API key.
$0.002/call USDC
Convert any URL to clean, LLM-ready markdown: pay-per-call API for AI agents. $0.002 USDC on Base via x402. No signup, no API key.
$0.01/call USDC
Live crypto + stock market overview in one call: pay-per-call API for AI agents. $0.01 USDC on Base via x402. No signup, no API key.
$0.0008/call USDC
Latest crypto and blockchain news headlines: pay-per-call API for AI agents. $0.0008 USDC on Base via x402. No signup, no API key.
$0.002/call USDC
Extract text from any PDF: pay-per-call API for AI agents. $0.002 USDC on Base via x402. No signup, no API key.
$0.001/call USDC
Perpetual futures funding rates across exchanges: pay-per-call API for AI agents. $0.001 USDC on Base via x402. No signup, no API key.
$0.006/call USDC
Polymarket prediction market odds and volume: pay-per-call API for AI agents. $0.006 USDC on Base via x402. No signup, no API key.
see page USDC
Full price list for 37 x402 pay-per-call APIs: $0.0008 to $1.50 per query in USDC on Base. No signup, no API key. Free daily trial on every endpoint.
$0.001/call USDC
Random facts, coin flips, and dice rolls: pay-per-call API for AI agents. $0.001 USDC on Base via x402. No signup, no API key.
$0.25/call USDC
AI investment memo: bull/bear case in one call: pay-per-call API for AI agents. $0.25 USDC on Base via x402. No signup, no API key.
$0.005/call USDC
Token safety check: detect rug pulls before you buy: pay-per-call API for AI agents. $0.005 USDC on Base via x402. No signup, no API key.
$0.08/call USDC
AI score 0-100 for any stock or crypto: pay-per-call API for AI agents. $0.08 USDC on Base via x402. No signup, no API key.
$0.002/call USDC
Latest SEC 8-K filings by ticker: pay-per-call API for AI agents. $0.002 USDC on Base via x402. No signup, no API key.
$0.03/call USDC
News sentiment scoring for any symbol or topic: pay-per-call API for AI agents. $0.03 USDC on Base via x402. No signup, no API key.
$0.003/call USDC
Real-time US stock quotes: pay-per-call API for AI agents. $0.003 USDC on Base via x402. No signup, no API key.
$0.0008/call USDC
Real-time crypto token prices: pay-per-call API for AI agents. $0.0008 USDC on Base via x402. No signup, no API key.
$0.008/call USDC
Screen new DEX token pairs by liquidity and volume: pay-per-call API for AI agents. $0.008 USDC on Base via x402. No signup, no API key.
$0.10/call USDC
Google Trends intelligence + AI interpretation: pay-per-call API for AI agents. $0.10 USDC on Base via x402. No signup, no API key.
$0.001/call USDC
Current weather by latitude/longitude: pay-per-call API for AI agents. $0.001 USDC on Base via x402. No signup, no API key.
$0.010/call USDC
Web search via Google, formatted for AI agents: pay-per-call API for AI agents. $0.010 USDC on Base via x402. No signup, no API key.