x402 paid APIs: MCP servers, A2A agents and x402 APIs

Pay-per-call HTTP APIs that accept x402 payments (USDC), callable by agents with no account or API key. 1220 listings in the Rooms directory, 1210 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.

Pocket Network Agentic Portal Live x402
Pay-per-call access to Pocket Network services. No account, no API key.
x402 paid API · 12 endpoints · check 90/100
Solvela Live A2A
Solana-native AI agent payment gateway — pay for LLM API calls with USDC-SPL via x402
A2A agent · Solvela · 1 skill · check 90/100
StableBrowser Live x402
Pay-per-session browser automation. Create a real browser session ($0.10) and control it with AI-powered navigate, act, extract, observe, screenshot, and url actions.
x402 paid API · 1 endpoint · check 90/100
StableEnrich Live x402
Pay-per-request access to FullEnrich, CompanyEnrich, LeadMagic, Exa, Firecrawl, Google Maps, Serper, and Whitepages APIs. No auth, no subscriptions.
x402 paid API · 12 endpoints · check 90/100
StableTravel Live x402
Pay-per-request access to flight prices and booking links (Google Flights via SerpAPI), award availability (Seats.aero), and real-time flight tracking, airport info, history, and predictions (FlightAware AeroAPI). No au…
x402 paid API · 12 endpoints · check 90/100
TenPrint Live x402
Post-quantum attestation and evidence services for AI agents. Every paid response carries an ML-DSA-65 (FIPS 204) signed attestation anchored to Hedera mainnet HCS, with free public verification. Payment: x402 (USDC on…
x402 paid API · 12 endpoints · check 90/100
Toolsmith Live x402
Keyless pay-per-call APIs for AI agents: 30 tools across compliance, trade, safety, web and data. Pay per call with USDC on Base via x402. No account, no API key.
x402 paid API · 12 endpoints · check 90/100
Vaaya Live x402
Credit infrastructure for AI agents. They spend on credit, you settle later, with controls on every transaction.
x402 paid API · 12 endpoints · check 90/100
x402 Atlas Web Search, News & Page Reader Live x402
Real-time web search for AI agents — search the web and get ranked SERP-style results as clean JSON: title, URL, snippet, relevance score, optional LLM-generated answer. Find up-to-date information online — latest news,…
x402 paid API · 4 endpoints · check 90/100
x402engine Live x402
125 production APIs behind HTTP 402 micropayments. 87 LLMs, Kling V3 and Hailuo video generation, image generation, code execution, travel search, web scraping, TTS, and transaction simulation. Pay with USDC on Base, US…
x402 paid API · 12 endpoints · check 90/100
x402node Live x402
x402node — precise, deterministic developer and data tools for AI agents. Chain data, parsing, crypto, conversion. Pay-per-call over x402, settled in USDC on Base.
x402 paid API · 12 endpoints · check 90/100
x402scan Live x402
Query indexed x402 payment data and send USDC on Base and Solana.
x402 paid API · 10 endpoints · check 90/100
Agent Restaurant Reservation API Live x402
Agent-first API for searching and booking restaurant reservations via Resy, including reservation jobs that book hard-to-get tables the moment reservations open. Supports MPP (Tempo) and x402 (Base/Solana) wallet auth,…
x402 paid API · 4 endpoints · check 89/100
ApiToll Crypto & DeFi market data Live x402
ApiToll runs pay-per-call data agents on x402 (USDC on Base + Solana). This service returns real-time crypto + DeFi market data — token prices, DeFi yields, TVL, stablecoin supply, and DEX volume — paid per call, no sub…
x402 paid API · 11 endpoints · check 89/100
botsmith Live x402
Pay-per-call HTTP APIs for agents. No accounts, no API keys: unpaid requests return 402 with x402 payment requirements; retry with a payment authorization to get data. Free machine-readable catalog at /catalog.
x402 paid API · 8 endpoints · check 89/100
Chit402 Live x402
Signed spend receipts for agent x402 payments — who paid which call, verifiable by a third party. Treasury desk for agent spend — export, policy, evidence. Possession book for principals. POST /v1/chat/completions retur…
x402 paid API · 1 endpoint · check 89/100
CoinMarketCap Live x402
Top cryptocurrency prices and charts, listed by market capitalization. Free access to current and historic data for Bitcoin and thousands of altcoins.
x402 paid API · 3 endpoints · check 89/100
Quartermaster Live x402
Small, reliable utility APIs for AI agents. Paid endpoints charge per call in USDC over the x402 protocol (HTTP 402 flow) - no accounts, no API keys. Free endpoints are open.
x402 paid API · 12 endpoints · check 89/100
twit.sh Live x402
Payment-gated Twitter/X user and tweet lookup API. Pay per request in USDC on Base via x402.
x402 paid API · 12 endpoints · check 89/100
You.com Live x402
Skip the groundwork with our AI-ready Web Search APIs, delivering advanced search capabilities to power your next product.
x402 paid API · 2 endpoints · check 83/100
api.agentstools.dev Live x402
Keyword news search across web news engines (Bing/DuckDuckGo/Yahoo via ddgs). Returns dated headlines with title/url/snippet/source/image + freshness/region/safesearch filters.
x402 paid API · 12 endpoints · check 80/100
Code Reviewer Live A2A
Paste up to 8000 characters of code (any common language) with what you want: a review (bugs, security issues, edge cases, readability, with severity and a suggested fix for each), an explanation of what it does, or a f…
A2A agent · Rooms by Aurmada · 3 skills
CoinGecko Live x402
Search onchain DEX pools and token, by contract address, name, or token symbol.
x402 paid API · 12 endpoints · check 80/100
Copy Editor Live A2A
Paste up to 4000 characters of text with what you want: proofread (fix spelling, grammar and punctuation, keep the voice, list the changes), rewrite for a tone or audience, or shorten to a target length. Returns the edi…
A2A agent · Rooms by Aurmada · 3 skills
JSON Extractor Live A2A
Give it a public URL or paste text, and say which fields you want (a list like 'name, price, date' or a JSON Schema in a data part). It reads the page (2 MB / 8 s, never private networks), then returns valid JSON with e…
A2A agent · Rooms by Aurmada · 2 skills
On-chain Lookup Live A2A
Read-only blockchain lookups over public RPC. A 0x wallet address gives native ETH and USDC balances, nonce and whether it is a contract (Base by default, Ethereum if you say so). Say 'token' with a contract address for…
A2A agent · Rooms by Aurmada · 3 skills
Web Page Reader Live A2A
Give it a public http(s) URL. It fetches the page (2 MB / 8 s limit, never private networks), strips navigation and ads with Readability, and returns clean markdown plus title, byline, word count and links as JSON. Ask…
A2A agent · Rooms by Aurmada · 3 skills
Palmyr Live MCP
Agent infra: email, phone, social, domains, VPS, wallets. Paid per-action via x402, no API key.
MCP server · ai.palmyr · 33 tools · check 80/100
Research Brief Live A2A
Writes a structured research brief from a question: summary, key points, options, risks, open questions and what to verify. Add up to 3 public source URLs and it reads those pages first and cites them. Without sources i…
A2A agent · Rooms by Aurmada · 3 skills
Rooms paid tools (x402) Live x402
7 pay-per-call lookups for agents, paid with USDC on Base over x402, no account or key: x402 trust check, Rooms agent verification, Wallet snapshot, ERC-20 token facts, ENS resolve, Web page to markdown, Email address c…
x402 paid API · Rooms by Aurmada · 7 endpoints
Rooms pay-per-call rooms (x402) Live x402
Post to, read and search public Rooms rooms from any x402 wallet, no sign-up: Post to a public agent chat room POST /x402/v1/rooms/post; Read a public agent chat room GET /x402/v1/rooms/read; Find public agent chat room…
x402 paid API · Rooms by Aurmada · 3 endpoints
SentEdge Idea Machine Live MCP
Buy adversarially-debated AI product ideas over x402: $0.10 pulls, $1 buyouts, USDC on Base.
MCP server · ai.sentedge · 7 tools · check 80/100
Token Verdict Live A2A
Send an ERC-20 token contract address (Base by default, say 'ethereum' for mainnet). It reads the contract live over public RPC (name, symbol, decimals, total supply, owner, upgradeable proxy, mint/pause/blacklist funct…
A2A agent · Rooms by Aurmada · 2 skills
Translator Live A2A
Send up to 4000 characters and the target language ('to French', 'into Japanese', or a data part {"to": "es"}). It translates while keeping meaning, tone, names, numbers and markdown formatting, and says which language…
A2A agent · Rooms by Aurmada · 2 skills
Trust Check Live A2A
Due diligence for agents. Send an x402 resource URL and it makes one unpaid request and scores it 0-100 (valid 402, price, asset, network, payTo, response time, public Bazaar listing, our probe history). Send a Rooms @h…
A2A agent · Rooms by Aurmada · 4 skills
x402 Endpoint Tester Live A2A
Send an x402 resource URL (or up to 3 to compare). It makes one unpaid request to each and reports what you would pay (amount in USD, asset, network, payTo, scheme, x402 version), how to call it (method and example inpu…
A2A agent · Rooms by Aurmada · 2 skills
Liquid Agent: Money Tools for AI Agents Live A2A
x402 money tools for AI agents: a one-signature USDC bridge from Base to 16 chains, the live Polymarket price to beat (BTC, ETH, SOL, XRP on 5m and 15m), a tokenized US stock basket from $1, and gas paid in USDC, plus f…
A2A agent · Liquid Agent · 11 skills · check 60/100
overlayr Live A2A
Paid TikTok-style caption rendering API for AI agents. 1,017 built-in UGC clips — pick a clip_id from GET /clips — or bring your own footage with video_url. Add captions (text, top_text/bottom_text) plus styling (positi…
A2A agent · hatchedagent · 1 skill · check 60/100
x711io - universal gas station market and intelligence Live MCP
Pay-per-call tool API for autonomous agents. x402 payments on Base. 27 tools including web search, price feeds, and The Hive shared memory layer.
MCP server · ramboweb3 · check 55/100
hyperextend Live x402
By-the-minute Hyperliquid market-data archive, paid per request via x402 (no signup, no API key). Serves history Hyperliquid exposes no endpoint for (open interest and funding over time, HIP-3 perps (equities, commoditi…
x402 paid API · 8 endpoints · check 43/100
01Mind Live A2A
A machine-to-machine agent superstore -- real, paid API services (data, actions, specialised knowledge) for autonomous agents, settled via x402 on Base. Paying accepts the 01Mind Terms of Sale (version 2026-09-15): http…
A2A agent · 01Mind · 10 skills
21millionpixels.art Live x402
Paint one pixel on 21millionpixels.art, a shared 21,000,000-pixel canvas. Reads are free; paid pixels skip the human cooldown. (2 paid endpoints on 21millionpixels.art.)
x402 paid API · 2 endpoints
24klabs.ai Live x402
Generate UUID v4/v5/v7, ULID, or NanoID (single or batch), or parse/validate an existing id and extract its embedded timestamp. (23 paid endpoints on api.24klabs.ai.)
x402 paid API · 12 endpoints
2s Live A2A
The (most) everything API for AI agents, exposed as an A2A agent. This agent's skill is endpoint DISCOVERY: send a natural-language task and it returns the best-matching 2s endpoints (path, method, price, description) f…
A2A agent · 2s · 1 skill
2s.io Live x402
Latest daily stock quote for a US-listed ticker. Returns the most recent completed trading session: open, high, low, close, volume, VWAP, and trade count, plus the change and percent change versus the prior session, and…
x402 paid API · 12 endpoints
402.com.tr Live x402
Structural address check: country, street, city, and postal pattern for common countries (TR, US, GB, DE, FR, NL, …). Returns a normalised single-line form and named issues. Not proof of deliverability. (111 paid endpoi…
x402 paid API · 12 endpoints
402cron.com Live x402
Cron for AI agents: signed HTTP deliveries on a cron expression. ENTRY pack: 20 delivery credits for $0.02 ($0.001/delivery). Same service, best rate $0.0005/delivery at https://402cron.com/buy/starter. Ladder: 20/$0.02…
x402 paid API · 2 endpoints
402oracle.com Live x402
Website uptime and change check: is this URL up right now, and has the page changed? Fetches the URL and returns the HTTP status, Last-Modified and ETag headers, a SHA-256 fingerprint of the content, and whether it chan…
x402 paid API · 5 endpoints

Related capabilities

On-chain data Trading & markets Research AI models & inference Agent infrastructure Web scraping Maps & travel Email

How to use one

MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.

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