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.
well-015-municipal-notices.mmelnyk2000.workers.dev
Recent public municipal notices as clean items with source links ($0.005 USDC). area: buffalo (Buffalo Planning Board/ZBA agendas + Erie County…
whale.hugen.tokyo
Look up any Ethereum address — returns entity labels, name tags, and categories from 412K+ labeled addresses. AI agent API for on-chain identity…
WhaleAlert
Large on-chain transaction monitor — whale movements on Base, Ethereum, and Robinhood Chain with AI pattern analysis
Warm-Up Generator
Warm-up generator, $0.01 USDC on Base: a targeted warm-up for a session type (strength, metcon, engine, speed run, zone 2) with optional prehab for…
Agent Revenue Network
AI-agent execution verification and automated task acceptance: check whether an automated task passed caller-supplied functional, security, privacy,…
www.echomarkets.xyz
EchoMarkets Dawn strategy template with 24h signal access
Tereno Base Chain Snapshot
What is the current state of Base? Latest block number, timestamp, base fee and suggested gas fees in a single cheap call with no parameters — the…
x402-agents-production.up.railway.app
Return live cross-exchange perpetual funding rates and the largest annualized funding divergences.
x402-fields
Extract structured fields (email, phone, dates, amounts, invoice numbers, …) from any text via deterministic regex — no LLM, no API key. $0.02 USDC…
x402-solvers
Detect whether an arbitrage opportunity exists in a set of token exchange rates (multi-pool negative-cycle scan). Cheap boolean + magnitude signal…
x402-stall-l3bb.onrender.com
Hello from Taiwan — a signed timestamp from my first x402 stall
Base Wallet Profile
Analyze a Base wallet address for on-chain wallet due diligence, transaction-history research, and risk triage. Returns native balance, transaction…
x402.fullstack.cash
Access to protected psf-bch-api resources (0.001 USDC)
x402.momusai.io
Momus MLB model: win probabilities for one game from a pitcher-aware Elo (starter FIP/ERA, bullpen, home field) fitted on 7,000+ games, the…
x402.onhub.ai
Text completion using the model selected in the request body.
pkgproof
Call before an agent runs npm install. Checks one npm package against the registry, OSV advisories, install scripts, typosquat and combosquat names…
x402.whisperbox.my.id
Currency rate conversion
x402 Identity Hub
Check whether an ENS identity name for an AI agent, API or MCP server is available on x402 Identity Hub (*.402bot.eth, *.402api.eth, *.402mcp.eth).…
138-68-190-61.nip.io
Hybrid Agent Endpoint
402scrape
Fetch any public webpage and return clean, agent-ready content for RAG, LLM context, research, and summarization. Strips navigation, ads, and…
60SecMonitor Status API
60SecMonitor Status API: Current outage status for a vendor (60SecMonitor). Current status, active-incident summary, last-checked time and source…
adviser-verify.iykykblog.workers.dev
Verify an SEC investment adviser by firm name or CRD number: registration status (SEC-registered / exempt reporting adviser), regulatory AUM and AUM…
agent-aircraft-verify.iykykblog.workers.dev
Verify an FAA aircraft tail (N-number) registration: status, expiration, make/model, serial, registration fraud & expiry flags. Public-domain FAA…
Agent Artifact Publisher
Publish agent-generated files, JSON reports, markdown, or text and return a stable public URL.
Agent Data Tools
Current Bitcoin network fee rates in sat/vB for next-block, half-hour, one-hour and economy confirmation, the estimated cost in sats of a typical…
agent-device-verify.iykykblog.workers.dev
Composite medical-device risk card from a UDI device identifier (DI), brand, or labeler company. Returns the GUDID labeler record (brand, company,…
agent-drug-verify.iykykblog.workers.dev
Look up FDA drug product information by NDC or name: labeler, dosage form, route, marketing status, approval date. Public-domain FDA NDC Directory…
agent-entity-verify.iykykblog.workers.dev
Verify a US business entity: status, formation date, registered agent, from official Secretary of State bulk data (plus GLEIF fallback for large…
agent-margin-router-production.up.railway.app
Agent Margin Router – Gas Fees: Live EIP-1559 gas fees (slow/standard/fast tiers) plus USD cost per transaction type (transfer, ERC-20 transfer,…
Agent Ready
Pay-per-scan AI agent-readability scan. POST { "url": "https://…" } with an X-PAYMENT header to run a scan with no account or subscription. Two…
agent-recall-screen.iykykblog.workers.dev
Screen a product, firm, or brand against FDA drug, device, and food recall (enforcement) history. Returns matching recall events with…
agent-sanctions-screen.iykykblog.workers.dev
Screen a person or company name against OFAC SDN, EU consolidated, and UK sanctions lists. Returns matches with details and an audit receipt.
agent-smb-loan-verify.iykykblog.workers.dev
Verify a small business's SBA loan history: every SBA 7(a) and 504 loan since 1991 — amounts, approval dates, program, and outcome (paid in full,…
agent-tariff-lookup.iykykblog.workers.dev
Look up US import duty rates by HTS code or product description. Returns the base General (MFN) and Column 2 rates of duty from the official USITC…
Agent Web Tools
Check if a URL is up: status, latency, redirects, title.
Atinamos JSON Validate / Repair
Deterministic JSON validation and conservative repair for AI-agent payloads. Repairs unquoted object keys, single-quoted strings, trailing commas,…
agent.gexlog.com
Lightweight gamma regime classification timeline. Returns regime, GEX flip, and key levels per date (max 90 days).
AgentAudit
x402 services ranked by 30-day on-chain settlement volume, optionally by category.
agentcash-fortune-demo3.vercel.app
Random fortune — fixed price; x402 exact or MPP one-shot
agentcrush.xyz
Verification and tier status for an AI agent on AgentCrush. Returns tier, verified flag, claim status, and last tier update timestamp.
agentic-diagrams-production.up.railway.app
Generate a self-contained animated architecture diagram as HTML, SVG, MP4, WebM, GIF or PNG
agentkit-x402-buy.netlify.app
ETH/USD spot via AgentKit x402 — $0.001 USDC
AgentResolver
No-body $0.001 x402 settlement test for funded agents. Verifies the buyer wallet, facilitator, USDC payment path, and paid delivery end-to-end by…
Request a Human
Ask a real person for a short written answer where human judgment matters: an opinion, a moral or social call, taste, or native-speaker intuition.…
agmail
Get an email address for your agent for one hour: name@agmail.shveik.dev, a name of your choice or a random one. Pay in stablecoins with x402 or…
agoraverify.com
Official French company data (SIRENE/RNE), cleaned: identity, geolocated HQ, NACE code, headcount, latest revenue and net income.
agorean-legwork.fly.dev
Register an Angelon username: $0.10 once. You get the name, your first API key (shown once) and 1000 free credits a month. Send {username,…
agoreum.xyz
Checks on chain that you paid an agent in USDC, then builds the ERC-8004 feedback file with that payment as proof, ready for your wallet to send.
Locus x402 Services
Locus public pay-per-use API
AIFoundry Weather
Current weather for any place on earth. Give a city name or a latitude/longitude pair; get temperature, conditions, wind and humidity.
api.bakhour.ca
Resolve ONE DNS record type for a domain -- the cheapest, narrowest domain-check endpoint. For all record types at once, use /domain/intelligence.…
Agent Board
Full listing with contact
Token Safety Verdict
Token safety check on Base before buying: honeypot, rug pull and scam detection. Verdict SAFE/CAUTION/SCAM with fixed reason codes and action…
api.gmfarcaster.com
Ask a natural-language question and get a cited answer from the GM Farcaster library — hundreds of episodes of Farcaster news, interviews, and…
GROUNDTRUTH
GROUNDTRUTH creator counts: launches, rugged, died, active, survived, graduated, and the observed-only baseline the known_bad line is drawn from.…
HelpMyAgent
Searches French companies by name, SIREN, SIRET or optional location criteria and returns structured matching company records.
PulseChain Head
Latest PulseChain block number and timestamp.
api.k8s-dev.blockscout.com
Access to api/v2/transactions. List blockchain transactions with filtering options for status, type, and method
Kviria
Resolve a user's natural-language place reference - "the cafe near the bookstore", "my hotel", "here" - into exactly one verified coordinate with an…
api.micacheck.workers.dev
Is this crypto entity MiCA-authorised in the EU/EEA, in which register, with what status? Query params: name (string) OR lei (20-character LEI).…
api.neurodynamic.tech
Introductory pricing. Catalogue narration: 0.005 USDC on Base, up to 1,000 characters, MP3. Seven English voices. No account, reference upload or…
api.pdfzen.site
Render a PDF. Pass `template` (one of 45 starter slugs: invoice, receipt, contract, certificate, nda, letter, report, quote, purchase-order,…
sendcheck
SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST…
PulseWatch Status API
PulseWatch Status API: Current outage status for a vendor (PulseWatch). Current status, active-incident summary, last-checked time and source URL…
RecallRadar
Search consumer-product safety notices by authority, jurisdiction, recall status, category, risk, hazard, manufacturer, date, or free text.
api.stackgoai.com
Extract structured public business contact information from any public business website. Returns company name, emails, phone numbers, social…
Teardrop
Teardrop crypto research agent over A2A: ask in plain language about token prices, DeFi yields and lending, wallet portfolios, approvals and…
api.tradebot.devs.surf
Crypto Market Data Integrity Attestation for agents and trading systems. Validate caller-supplied crypto market observations for causal timing,…
api.trustsource.cc
Check whether a domain's TLS/SSL certificate is valid, trusted, and not expiring before connecting to it. Performs a live handshake and returns a…
x402 Hosting
Create an upload session to deploy a new version of an existing project. Call this when publishing an update; it returns a presigned artifact upload…
x402 Identity Hub
Check whether an ENS identity name for an AI agent, API or MCP server is available on x402 Identity Hub (*.402bot.eth, *.402api.eth, *.402mcp.eth).…
apify-api-git-br-better-actor-pay-merit-systems.vercel.app
Start the "Instagram Scraper" Apify actor (apify/instagram-scraper). Scrape and download Instagram posts, profiles, places, hashtags, photos, and…
app-446.hdgregory.com
Scrapes a URL and returns structured JSON: title, meta tags, headings, paragraphs, links, tables, extracted emails and phone numbers, and word…
app.aabc.app
AABC Base Agent Report
atomic-verify-claim-poc.topadvancement-atomic.workers.dev
Resolve an HTTP or HTTPS URL through redirects and return the complete redirect chain, HTTP status for each hop, final URL, and redirect safety…
Spend Check
Spend Check: should you pay this counterparty? Watchtower track record, CDP merchant catalog, and address hygiene combined into a…
au-charity-verify.iykykblog.workers.dev
Verify an Australian charity against the ACNC (Australian Charities and Not-for-profits Commission) register. Look up by ABN or charity name;…
au-company-verify.iykykblog.workers.dev
Verify an Australian company against the official ASIC register. Look up by ACN, ABN, or company name; returns a registration status verdict…
Apify Actor Preflight
Vet an Apify actor before you spend on it. Send one actor ID (e.g. apify/instagram-scraper) and get scored JSON in seconds, with evidence and a…
AUTO411 VIN & Vehicle Fitment
AUTO411 is a VIN lookup and vehicle data API for AI agents. Resolve a full VIN or year, make and model to a validated vehicle identity and…
book-bot.app
Search audiobookbay.lu for audiobooks. Returns up to ~12 result entries with slugs that can be passed to /api/audiobooks/details for magnet links.
BUY SIGNAL Portugal
Given a Portuguese company NIF/NIPC, return official Portugal 2030 EU-funded project facts and evidence-based inferred investment and purchasing…
calendar-api-production-33a1.up.railway.app
Create RFC 5545 ICS calendars for appointments and itineraries, with all-day events, locations, descriptions and bounded recurrence. Timed events…
Canadian Rates and Yields
Canadian interest rates and government bond yields — latest business-day Bank of Canada overnight policy rate and 2-, 3-, 5-, 7-, 10-year and…
CascadeWatch
DeFi liquidation cascade risk — Morpho Blue health factors and cascade exposure
rugcheck
Token safety scanner for Base: 0-100 safety score, risk band, and red flags (liquidity, honeypot signals, upgradeable proxy, pair age, 24h flow) for…
ChainScout
On-chain intelligence — whale transfers trending tokens DeFi TVL on Base and Ethereum
fee_estimate
Current network fee conditions -- gas price (ETH/Base/Arbitrum/Optimism/Polygon), sat/vB fee tiers (Bitcoin), or recent prioritization fees (Solana)…
Chemical equations
Given a reaction and the supplied amount of every reactant, identify the limiting reagent and compute leftover reactant and theoretical product…
CodePulse
Package security scanner — CVEs, license check, typosquat detection.
contract-api-production-c176.up.railway.app
Validate up to ten JSON documents against JSON Schema draft-07 or 2020-12. Returns per-document validity and actionable errors with instance paths.…
COT
CFTC Commitments of Traders positioning for a market (?market=<name>)
cron.memoryapi.org
Retrieve change alerts for monitored URLs. Returns list of detected changes with timestamps.
Verify deliverable, code only
Verify output another AI agent hands back, by code alone, for $0.005: no model call, answers in about a second. Recomputes the deliverable's written…
CyclePulse
US inventory & production cycle signal (bullwhip gauge)
dappgrade
dappgrade score — front-end integrity verdict for an onchain app, looked up by contract address. Inspects the app's public web front-end, not…
DataPulse
NOAA HRRR 3km weather forecast at any CONUS coordinate. Returns temperature, humidity, wind, precipitation, and cloud cover for up to 18 forecast…
datoka-api.bhazarstudio.workers.dev
Datoka API: a portable signed commitment to a client-declared API exchange for response handoffs, archived decision inputs and change…
deadchannel
Use before paying an x402 endpoint you have not used before, when you cannot tell a working seller from a trap, a testnet address dressed as…
Locus x402 Services
Locus public pay-per-use API