x402 Pay-Per-Call APIs for AI Agents
Pay-per-call APIs that use the x402 protocol: the server answers HTTP 402 with payment details, and an agent pays per request, usually in USDC, without an account or API key. Entries come from a public x402 discovery index, and each provider sets its own price.
kleros-ipfs-gateway.fly.dev
Pin a file to IPFS
Blackwood State Speech to Text
Use when you need speech to text transcription or translation of an audio file at a public URL. Do not use for audio over 10 MB or speaker labels.…
Annalist
For bots that poll: crowd-state events (a perp entering or leaving a state) since a timestamp, newest first, up to 7 days back. Each event is signed…
HyperNatt Terminal
NattSwap cross-chain swap quote (Li.Fi)
satellite-imagery
Satellite images of any place on Earth for a given day since 2000: true color (MODIS Terra/Aqua, VIIRS), false color for burn scars and floods, and…
JAW.id ENS Reverse Resolver
Resolves an address into its ENS reverse record on a given chain, with batch support up to 50 addresses and per-address chain scoping via interop…
Retriever AI
Opens each URL in a cloud browser and returns one tab per URL, in input order, with the title, content type, extracted text, the accessibility tree…
Resolve402
Company directors in France and the United Kingdom (CEO, président, gérant, managing director) with their probable business email, in one call. From…
hyperextend
The most-recent N OHLCV candles (≤5000). Same per-row pricing as the windowed read ($0.00001 base for main/spot, $0.000025 premium for HIP-3/HIP-4);…
clink-lithium-vault.fly.dev
X/Twitter search for AI agents - live tweets via advanced search: from:user, exact phrases, #hashtags, min_faves, lang, since/until dates. Returns…
mcp.blocksize.info
Real-time shared bid/ask snapshot data, including crypto pairs and supported equity tickers, from Blocksize Capital.
stealthguard-402.onrender.com
Deterministic TRUST or BLOCK gate combining on-chain Base RPC liquidity and honeypot checks with CanaryGuard injection scrubbing.
api.cryptoetfsentinel.com
Crypto ETF Sentinel — Latest POS AM-extracted operational profile for one US spot crypto ETF issuer: custodian, sponsor fee, AP counts, in-kind…
Mekler AI
Annual US-GAAP facts by CIK, SEC sources, same-filing growth checks and observed revisions. Fast quote or coverage preview. Free SEC data; paid…
api.munition.io
Munition Firecrawl Scrape: x402-paid web page scraping for AI agents. Pay 0.015 USDC per URL to get the page rendered with JavaScript and converted…
api.orcatrace.dev
Paid ($0.01 USDC via x402). Most recent Polymarket feed item — mover, whale entry (with calibration), or predetermined signal. Same shape as…
TraceFast
TraceFast live Ethereum data: the most recent block, with its header and the totals of what it contains — transaction counts by outcome, gas, fees,…
Toolrail
Current VAT rates for supported European countries (EU-27 + UK, CH, NO...). Standard, reduced and super-reduced rates, provided through the…
Toolsmith
Keyless web search for agents: pass a query, get a concise web-grounded answer plus the top source results (title, URL, snippet). Live web access,…
x402 tools
Generate QR codes for text, URLs, or Web3 payment requests (EIP-681 / Solana Pay). Supports PNG, SVG, JSON output with dataUri, custom colors, and…
Allium
API request: /api/v1/explorer/queries/run-async
Kakerapetit
EDINET filing calendar: annual securities reports (yukashoken hokokusho) filed by Japanese listed companies in a date range. Returns company code,…
DeepSeek V4 Flash Chat API
DeepSeek V4 Flash Chat API (deepseek/deepseek-chat): LLM inference via OpenAI-compatible chat completions, pay per call in USDC on Base with x402.…
web-page-brief-evidence
Turn a web page URL into a structured, evidence-backed brief: clean content summary, key points, named entities, sentiment, and claims each quoted…
Business Frameworks
Business Frameworks · business-frameworks/value/why@1.2 — why value is the objective a business is run against, and what moves it. Call before using…
StableBrowser
Create a new browser session ($0.10). Optionally pass sessionId to resume an existing Browserbase session. Returns sessionId (Browserbase session…
api.aventtech.com
QR code generation returning clean scalable SVG: any text/URL up to 1800 chars, selectable error-correction level (L/M/Q/H).
api.run402.com
Set prototype tier ($0.10 USDC) — auto-detects start/renew/upgrade
SEC Filings: 10-K, 10-Q, 8-K
SEC filings lookup: give a US stock ticker or CIK, get the company's recent SEC EDGAR filings (10-K, 10-Q, 8-K and more) with links, plus its profile.
stockwaves.net
China pulse, cheap enough to POLL: what China is talking about RIGHT NOW and what is NEW since your last call - built for agents that monitor…
api.moltalyzer.xyz
Historical hourly AI intelligence digests (1-24 hours lookback). Track how AI agent sentiment, topics, and narratives evolve over time. Each digest…
GEDX402 Chat
Multi-model chat completions. POST messages[] and set model to any LLM id from GET /v1/models; dynamic USDC pricing scales with model and token…
ioswarm.io
Live quotes for up to 8 symbols — stocks, ETFs, crypto pairs (BTC-USD), FX — price, session change and currency, in the paid response. $0.01 per…
scout.hugen.tokyo
Search GitHub repositories — discover open source projects, developer tools, and trending repos. AI agent API for competitive intelligence. Accepts…
x402-trends-server.onrender.com
Scrape a public webpage and extract clean readable text. Use this web scraping endpoint when an AI agent needs page content for summarization,…
x402 Carbon Retirement API
Entry point to the x402 Carbon Retirement API on Base. Returns every endpoint you need plus a live snapshot of the top 3 carbon classes and…
x402helper.xyz
Find US court cases, opinions and dockets naming a business, with case name, court, date, citation, docket number and nature of suit.
api.demandex.dev
Paid ($0.01 USDC via x402). Returns the top 20 active opportunity cards by score as TEASERS — { id, slug, title, category, score, signalCount,…
workspace-x402-paywall.onrender.com
Returns a JSON object with the caller IP address as a string
Particle Pro
Search podcast episode content. To find podcasts (shows) by name or topic, use /v1/podcasts/search?q=….
api.signalis.dev
Paid ($0.01 USDC via x402). Active AI-business narratives with lifecycle stage, driving sources, and momentum. Proxied from the Pulse service.…
new-token-launches-bsc
BNB Smart Chain: Newest DEX pools / token launches on a chain, minutes after creation: token, price, liquidity, volume, buys/sells and creation…
web-search
Free-text web search for AI agents: ranked title/url/snippet results fused across multiple engines (Brave, Google, DuckDuckGo, Mojeek, Startpage,…
Volatility Regime
Options-style volatility regime: ATR percentile and market-regime detection for a futures instrument.
CryptoMacro Intelligence Agent
Spot price, market cap, 24h volume and 24h change for any coins by id (bitcoin, ethereum, solana and thousands more), in any quote currency. The…
GEDX402 LLM
Frontier chat on QWEN3 30B A3b FP8 (@cf/qwen/qwen3-30b-a3b-fp8). POST messages[] for reasoning-heavy agent workloads; dynamic token pricing. Hero:…
SkyCast
Current weather for a city or lat/lon: temperature, humidity, wind, conditions. After your call, please rate this service for other agents: GET…
www.pennypress.org
A fragment about the gamble.
Multi-Source News
Newest headlines from a deduped, tiered 972-feed direct portfolio (primary sources + wires/majors + trade press + Hacker News + gated GDELT), newest…
XH Agents AI Trading Assistant
One 0-100 safety score for a Base token before an agent buys: liquidity, top-10 holder concentration, owner powers in the bytecode, upgradeability…
Roll
Verifiable RNG — cryptographically-random integer(s) signed by the treasury key. Drop-in VRF for game studios. $0.001 USDC.
Urban Game Theory
Return the latest or a subject-selected recipe-bound, source-hashed proposal lifecycle fact.
Kertivo Shield (full)
Full-history address-poisoning check before you send USDC on Base. Same risk/lookalike/seenBefore logic as /address/check, but funding history comes…
Locus x402 Services
Locus public pay-per-use API
SchemaSure
Extract strict, JSON-Schema-valid typed JSON from unstructured text or HTML. Failed extraction calls are not settled. Primary x402 V2 API for…
api.aurenic.org
Spot price lookup (USD) for a crypto symbol
ffpipe
Extract still frames from any video as JPEG, WebP or PNG: sample many for a vision model, or grab one frame at a given timestamp (a…
Crypto Staking Rewards
Crypto staking rewards: live staking APY and TVL for liquid-staking and restaking protocols (Lido, Rocket Pool, ether.fi, Jito, Binance, …), ranked…
Meme Generator
Generate a captioned meme image. Pay per request in USDC on Base mainnet.
x402.billionaireorder.com
M2M memory recall: semantic search over graph_memory + farcaster_graph. Input query + fid. Output facts. Pay-per-call $0.01 USDC Base
api.isocast.dev
Latest observed weather signal for one city — a single-signal SPOT snapshot (like a market-data quote). Flat $0.01, payable by a STOCK x402 client…
Atlas Market Data
Market data OHLC candlestick bars for stocks, crypto, forex and options — historical aggregates over any window by ticker.
Email Validate
Validate an email address using syntax, MX, disposable-domain, role-account, and domain-risk checks. Returns structured validation data for agent…
ISHOB
Structured specification table (values, ranges, tolerances, units) extracted from licensed documents
api.vindexapi.dev
Normalized NHTSA vPIC VIN decode (?vin=) — make/model/year/engine/body/… with fetch provenance, plus ORIGINAL factory new-vehicle warranty terms…
fanfare.run
Current NBA standings by conference — wins, losses, win percentage, and conference rank for all 30 teams.
Rooms by Aurmada
Use it before you send to an address, or to screen sign-ups and leads for typos, disposable domains and role addresses. Checks syntax, MX records…
Tenjin
Tenjin's tool router. Send a turn's bounded conversation packet, or a one-line query, and get which pay-per-call x402 service fits the step, if any,…
Hyperliquid Smart Money Data API
Hyperliquid perps (perpetual futures). What history exists before you pay for it: how many markets we track, which asset classes, and the range…
DNS A Record Lookup
DNS A record lookup — resolve any hostname or domain to its IPv4 addresses, returned as a clean JSON list. For host resolution, connectivity and…
Cookin
The 20 most recent buys by the top Cookin trading agents, newest first, each with quality signals plus when it was bought and by which agent.
api.getplexa.com
Plexa /v1/pretrade/check — pre-trade token safety check on Base: can you still sell this token? avoid fires only on a trap proven on-chain now: no…
RobinX
Live scored launch feed (realtime) — or add ?tier=free for the 10-min-delayed free feed, or ?tier=alpha ($0.02) for caller_signal enrichment
api.seerium.xyz
Macro market signals API for agents. Tracks inflation, rates, liquidity, economic releases, crypto, and prediction markets.
Agent Kalender Hub
Deutschland auf Bundeslandebene inklusive der Gemeinde-Sonderfälle, Österreich auf Bundeslandebene, die Schweiz auf Kantonsebene. Bewegliche Feste…
serp402
Google search for agents, paid per call: web, news, images, videos, places, shopping and Scholar, all returned in one shape with canonicalised URLs,…
Toll402
Offline validator for a Romanian CUI (company tax ID). Strips an optional 'RO' prefix, applies weights 7-5-3-2-1-7-3-2 to the digits preceding the…
toolvend.dev
VAT calculator for EU-27 + UK: net→gross or gross→net at standard or reduced rate. Includes rates table snapshot date.
AMNT
Bitcoin price - Get the current Bitcoin spot price in any fiat currency using CoinGecko’s free public API; returns the raw JSON price object.
WebLens
Fetch and convert any webpage to clean markdown. Fast, no JavaScript rendering. Perfect for static content, articles, and documentation.
FortiSwap
List every token FortiSwap routes on the X1 blockchain (XDEX + Degen launchpad): mint, symbol, name, decimals, logo, USD price, 24h volume, TVL,…
x402-seller-0ay3.onrender.com
Top DeFi protocols ranked by TVL (total value locked), highest first, source DefiLlama. Optional parameter: ?limit=<n> (1 to 100, default 20).
api.aurelianflo.com
Exact-match OFAC wallet screening and crypto wallet sanctions check for sanctioned digital currency addresses. Screens one wallet address against…
CRA AGENT data
A pair on Arc as executed against USDC: volume-weighted rate, range, the rate by trade size, and where the volume traded. ?symbol=EURC (default),…
BAGS Agent API
BAGS Agent API index — machine-readable directory of the agentic payment API, MCP server, and x402 payment surface.
agentworld.me
AgentWorld Agent Leaderboard - top AI agents ranked by USDC wealth or reputation score. Includes job role, city, mood, personality archetype.…
api.tcgapi.dev
TCGPlayer current prices for every card in a set — useful for set value tracking and sealed Pokemon / Magic / Yu-Gi-Oh product pricing.
robotshop.up.railway.app
Fast AST microservice that strips markdown code fences, fixes trailing commas, repairs unquoted JSON keys, and enforces strict schema validation for…
www.capminal.ai
AI-powered Token Deep Research API
Useless Fact
Pay a tiny amount of USDC and receive one delightfully useless fact.
Base64 / Hex / URL Codec
Country, city, region, ISP/org, and lat/lon for an IPv4/IPv6 address (ipwho.is, keyless).
api.biotechcatalystsentinel.com
PDUFA dates a company put in an SEC filing, not a calendar of every US-listed biotech. Each date is grounded in a verbatim filing quote, cited to…
Locus x402 Services
Locus public pay-per-use API
Geocoder
Forward and reverse geocoding on OpenStreetMap data: turn place names, addresses, and landmarks into coordinates with structured address components…
StableStudio
Get a client token for direct upload to Vercel Blob
Agent Utilities
Paste-ready bid draft (0.01 USDC cheapest). Free radar first: GET /v0/sample-radar then POST {brief}.
hcrb.in
Base block header: number, timestamp, transaction count and base fee for the latest or a given block. Result carries a signed receipt.
x402.coinopai.com
Returns the 4 top-level product categories (market intelligence, workflows, media generation, infrastructure) with endpoint lists and service counts…
Brazil Data API
Official USD/BRL and EUR/BRL exchange rates (PTAX, Central Bank of Brazil).
Crypto Token Price (USD)
Crypto token price in USD for AI agents: give a token contract address or mint (or "SOL") on Base, Ethereum or Solana, get its live USD price read…