x402 API docs

37 pay-per-call endpoints on Base. No signup, no API key — call, get 402, pay USDC, retry with X-PAYMENT. Every endpoint has a free daily trial per IP.

⬇ Postman collection (v2.1) prices $0.0008 – $1.00 USDC/call

All endpoints

ID	What it does	Price	Free trial	Host
`tokenprice`	Real-time crypto token prices	$0.0008	10/day	contabo	try
`defi`	DeFi token intelligence: TVL, yields, and protocol data	$0.0008	10/day	ih	try
`news`	Latest crypto and blockchain news headlines	$0.0008	10/day	ih	try
`fxrates`	Foreign exchange rates for 160+ currencies	$0.0008	10/day	ih	try
`weather`	Current weather by latitude/longitude	$0.001	10/day	contabo	try
`perpfunding`	Perpetual futures funding rates across exchanges	$0.001	10/day	contabo	try
`gastracker`	Live Base and Ethereum gas prices	$0.001	10/day	ih	try
`random`	Random facts, coin flips, and dice rolls	$0.001	10/day	contabo	try
`defiyield`	Live DeFi yield rates across protocols	$0.001	10/day	ih	try
`markdown`	Convert any URL to clean, LLM-ready markdown	$0.002	10/day	contabo	try
`chain`	Read ERC20 balances and EVM chain data	$0.002	10/day	contabo	try
`sec8k`	Latest SEC 8-K filings by ticker	$0.002	10/day	contabo	try
`pdf`	Extract text from any PDF	$0.002	10/day	ih	try
`chainread`	Check balances, transactions, and gas on Base + Ethereum	$0.002	10/day	contabo	try
`macro`	Key macroeconomic indicators	$0.002	10/day	ih	try
`stocks`	Real-time US stock quotes	$0.003	5/day	contabo	try
`academic`	Search academic papers with abstracts and citations	$0.004	5/day	ih	try
`rugcheck`	Token safety check: detect rug pulls before you buy	$0.005	5/day	contabo	try
`dnswhois`	DNS and WHOIS lookup for any domain	$0.005	5/day	contabo	try
`polymarket`	Polymarket prediction market odds and volume	$0.006	5/day	ih	try
`tokenscreener`	Screen new DEX token pairs by liquidity and volume	$0.008	5/day	contabo	try
`agentrecommend`	Recommend the right API for your agent's task	$0.008	5/day	ih	try
`websearch`	Web search via Google, formatted for AI agents	$0.010	5/day	contabo	try
`marketdata`	Live crypto + stock market overview in one call	$0.01	5/day	contabo	try
`ksearch`	Multilingual knowledge search over 2,400 curated chunks	$0.01	5/day	contabo	try
`aisearch`	Web search with AI-generated summaries	$0.015	2/day	contabo	try
`aiverdict`	AI verdict: structured analysis on any topic	$0.015	2/day	contabo	try
`sentiment`	News sentiment scoring for any symbol or topic	$0.03	2/day	contabo	try
`sbscore`	AI score 0-100 for any stock or crypto	$0.05	2/day	contabo	try
`13fintel`	13F hedge-fund holdings with AI summary	$0.10	2/day	contabo	try
`researchmemo`	AI investment memo: bull/bear case in one call	$0.10	2/day	contabo	try
`trendsintel`	Google Trends intelligence + AI interpretation	$0.10	2/day	contabo	try
`docextract`	Document AI: PDF/image to structured JSON	$0.30	1/day	contabo	try
`earningspack`	Earnings prep pack: date, consensus, AI preview	$0.35	1/day	contabo	try
`amlscreen`	Check before you pay	$0.75	1/day	contabo	try
`contractaudit`	AI smart contract audit: vulnerability scan	$1.00	1/day	contabo	try
`gpubroker`	Rent a spot GPU per job — pay USDC, get SSH	$1.00	1/day	contabo	try

Quick start

Pick an endpoint above and open its doc page.
Copy the curl example — no key needed.
Your first calls each day are free (quota shown per endpoint). When the trial runs out, pay $price USDC on Base and retry with the X-PAYMENT header.

Import the Postman collection to try every endpoint with one click. Base URLs are pre-set as variables base_url_contabo and base_url_ih.