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.
web-scraper-api-production-bf20.up.railway.app
Extract page metadata: title, description, keywords, author, published/modified dates, canonical, language, favicon, and OpenGraph/Twitter card tags.
Wikipedia Article Summary
Wikipedia article summary — plain-text and HTML extract, short description, thumbnail and Wikidata id for any title, in a clean normalized envelope…
www.watchevelive.com
Eve’s RWA print: which official number is the actual (T-bill, gold, NAV). Call for official prints, not casino coins.
Official Macro & FX Data
Use when an agent must verify a company (KYC/KYB, supplier or invoice check): official legal name, address, legal form, active/dissolved, LEI,…
x402-gateway
Paid ping — test the x402 payment flow end-to-end. Returns pong. Costs $0.001, exists so agents can verify their x402 wallet setup against this…
x402-tools.vercel.app
Search for upcoming concerts. Supports city, date range, genre, and artist filtering.
x402.blackswan.wtf
Precursor Detection - Catches risk signals before events materialize
x402.magneta.finance
Deterministic smart-contract risk report for any deployed contract on 20 EVM chains: 0-100 score, proxy/upgradeability, owner and pause state,…
x402.monpham.work
Search products across China B2B wholesale marketplaces (Yiwugo, Made-in-China, DHgate) via a stealth browser farm. Returns structured products:…
WebIntel Metadata Extractor
Extract structured metadata from any URL: page title, meta description, Open Graph and Twitter Card tags, canonical URL, favicons, language,…
x402swag.com
x402swag.com — merch store for AI agents and builders. T-shirts, stickers, mugs and custom print-on-demand designs. Full catalog with prices,…
x402toll.com
Tip amount, total, and per-person split for a restaurant bill.
ZeroWorker Security API
Prioritize up to 50 CVEs in one request using FIRST EPSS, CISA KEV, and known ransomware signals. Returns deterministic risk scores, urgency tiers,…
agent-carrier-verify.iykykblog.workers.dev
Verify a US freight carrier by DOT or MC number. Returns carrier identity, operating authority status, safety rating, and 24-month crash summary…
Agent Data API
Search open U.S. federal contract opportunities (solicitations, presolicitations, sources sought) from a copy synced from SAM.gov several times a…
Agent Data Platform
NSW Development Applications: Search NSW development applications by council, suburb, postcode or lodgement date, newest lodgement first.
agent-memory-api-production-f2c4.up.railway.app
List all stored memories in a namespace, most recently updated first. Returns a JSON array of memory records.
agentic-trades.ai
One Capital Markets Record for $0.01 USDC — a listed issuer's identity, registry identifiers, aliases, listing, disclosure events, auditor and…
agentkit0.com
x402 ecosystem pulse. Returns 24h Base-mainnet stats: total USDC volume across all bazaar-registered sellers, active seller count, unique buyer…
agents.aiscale.pro
AiScale Sentiment: Real-time sentiment analysis for a stock ticker. Returns score (-1 to 1), mention volume, source breakdown, and trend direction.
AQL PropertyCheck
AQL PropertyCheck full report for one City of Gold Coast or Brisbane City address: the property and what surrounds it, with source and status where…
agents.thirdmade.net
Scrape any public web page and get clean structured JSON (title, text, meta). Pay per call with USDC on Base.
alfa.alfa-agente.com
Performs comprehensive URL health checks, measuring response time, status code, security headers, and TLS/SSL certificate validity. Route: GET…
AnalystEdge
Analyst consensus, price target + upside, and recent upgrades/downgrades for a ticker (?symbol=)
IXS
IXS Real world asset vaults — 6% yields, BlackRock exposure, tokenized on-chain
api.alexstokes.com
UK tenders and public procurement search for apps, automations and AI agents. Search UK government contract notices from Find a Tender by keyword,…
api.exende.dev
Create a temporary public webhook endpoint for AI agents and automated workflows that need to receive asynchronous callbacks from external services.…
Foretagskoll
Company lookup in SE (Sweden), NO (Norway), FI (Finland), GB (United Kingdom) by registry number: official name, legal form, active/dissolved…
GadgetHumans API
Generate fresh random UUID v4 identifiers, one or many in a single call. Cryptographically random, instant. Use for unique ids, request keys or…
api.gigsoul.com
Fast, cheap spam-risk gate for one email: pass/warn/fail, a 0-100 score, and up to 3 flagged phrases. Use for a go/no-go before sending or for bulk…
api.metalend.tech
Returns MetaLend API services directory with a one-line summary of each RebalancerResource endpoint plus links to API docs.
FastPath Bitcoin API
Pay once to receive a short-lived WebSocket ticket for the live Bitcoin mempool stream.
api.obeliskapp.io
Search Obelisk's curated spy ad catalog when you need competitor creative examples by keyword, brand, or platform. Returns JSON ad cards. Use…
api.paywallwatch.com
Use when an agent has an email address from a form, a scrape or a CRM and must decide whether it is worth sending to. Screens the address: syntax,…
api.rafidsystem.com
Calculate gross/net rental yield, income, operating costs and simple payback in OMR. Calculations only. Paid per call via x402; no API key required.
api.slamai.dev
Returns trending tokens across the entire blockchain for a specified activity window and optional category. The size of the increase in active…
YouTube Summary & Transcript
Full transcript of a YouTube video from its URL — captions/subtitles as clean plain text in your language. YouTube transcript, video to text,…
QUIZ ABOUT ANYTHING
Got an idea? Describe it and Nano Banana brings it to life as a stunning AI-generated image. From realistic portraits to abstract art, any style,…
SafeRoute
Check whether an approved Base token swap is eligible before supplying a wallet. Returns verified token contracts, indicative output, liquidity…
aspern.org
The daily history of one agent record: dealings, independent payers, concentration and delivery over time.
Astronomical Julian Date
Compute the astronomical Julian Date (JD, fractional, epoch noon 1 Jan 4713 BC) and Modified Julian Date (MJD = JD − 2400000.5) of a UTC instant.…
BC Childcare Register
BC Childcare Register: buy one current structured obligation record with original-source citations. Find a relevant ID first with free search at…
billitright.co
Password - CASA Cybersecurity Assessment - Consolidates evidence on secure communications, including certificate validity, hostname matching,…
Brazil Rates and Inflation
Latest Brazil Selic policy target interest rate from Banco Central do Brasil SGS 432, in percent per annum, for monetary policy and borrowing-cost…
GEDX402 Firecrawl
Firecrawl v2 API proxy — map. JSON body matches https://docs.firecrawl.dev/api-reference/v2-introduction. Poll GET routes are free; POST/PUT/DELETE…
dao.halowerk.com
Delegated Voting Concentration analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or…
Open Source Vulnerability Check
CycloneDX SBOM vulnerability check — analyze bounded JSON 1.5 software bill of materials components against OSV and prioritize exact CVE matches…
dns-intel-api-production.up.railway.app
Reverse-DNS lookup for an IP: PTR record plus a best-effort list of other domains hosted on the same IP.
DNS & WHOIS Lookup
Send up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) plus the full WHOIS…
EarningsCalendar
Earnings calendar — upcoming report dates, EPS and revenue estimates for up to 30 tickers
edge.innovalyxx.com
Returns a 0–100 generative-engine visibility score and estimated LLM mention rate for a URL. Cost $0.01 per call. Not HTTP uptime, TLS, or a credit.
StableEnrich
Exa Search - Neural search across the web
esyURL styled QR codes
A styled QR code (module shapes, corner markers, a logo or a halftone photo) for any text, no account needed
evensteven.bet
A bettor's Even Steven positions on one market: stakes that pay even money at liquidity, the early line each bet locked, and claim status, with the…
faultcode-diagnostic-mcp.bowling-anthony.workers.dev
What a vehicle fault code means, with source-attributed generic and make-specific definitions and any disagreement between sources stated.
WickedAPI Filings Oracle
Form 4 insider transactions parsed to one row per trade: insider, role and title, security, code (P purchase, S sale, A grant ...), shares, price,…
finance.toon.haus
Stock quote with company profile
flipr-x402.fly.dev
Withdraw agent ETH balance to USDC (mutates: gas + swap)
fomo.x4o2.com
Current FOMO market panel for one token (price, market cap, 24h volume, liquidity, holder count), its trading statistics (buy/sell counts and…
forensik.halowerk.com
Address Poisoning Detector analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace…
Convert structured data
Transcode a document between json, json5, jsonc, yaml, xml, csv, tsv, toml, ndjson, ini, env, properties, plist and querystring. Any source converts…
Fresh402 Web Intelligence
Check a persistent watch or URL for changes, with noise filtering, conditional HTTP and a compact deterministic diff. $0.005 USDC.
GiftPulse
Search Reloadly's gift card catalog (300+ brands, 14,000+ products/denominations across countries). Returns each product's id, brand, country,…
Corporate parents by LEI
Resolve a legal entity's direct and ultimate accounting-consolidating parents from GLEIF's global CC0 LEI registry. Returns parent names and LEIs,…
GovEdge
Upcoming federal contract solicitations from SAM.gov. Filter by keyword, NAICS, or set-aside type. $0.20/query via x402 on Base.
Hacker News Data
This tool reads live information from Hacker News, a popular website where people share and discuss technology news. You can either ask for a…
HTML entity encode
Encode text to HTML entities so it can be safely embedded in markup. By default uses hex numeric references; set useNamedReferences for named…
Image Optimizer & WebP Converter
Convert and compress images to WebP, AVIF, JPEG or PNG. Optimize and shrink photos for web and CDN delivery from any image URL.
InsiderFlow
Insider trades — SEC Form 4 buys and sells by officers and directors for any ticker
IPPulse
IP reputation, geolocation, ASN lookup — proxy/VPN/Tor detection, abuse scoring, and open port analysis for any IP address.
ISO 4217 currency lookup
Look up an active ISO 4217 currency by its alphabetic code or numeric code. Provide exactly one field. Returns the code, numeric code, name and…
Jev Structured Evaluation
Structured evaluation with TypeSafe's Jev (System One) model. Send any state plus typed questions — noul (true/false), choice (pick one), or score…
HALOWERK kettenwerk
Checks one address on Ethereum, Base, Arbitrum, Optimism, Polygon or BNB Smart Chain against the open verification registry and against the chain…
LaborPulse
US labor-market signal (jobs, unemployment, wages, JOLTS)
leftclaw.services
Smart Contract Audit — Security review of a single contract
Link Lens URL Inspector
Extract metadata and readable text from a public URL.
llm-toll-production.up.railway.app
AI chat completion. Body: {"messages":[{"role":"user","content":"Hello"}]}. Returns AI reply.
Agent Email Check
DNS and list based verification. Never claims that a mailbox exists without evidence: without an SMTP probe the verdict for a routable address is…
makememoneynomistakes
Independent scoreboard of ERC-8004 agents on Base: a page of up to 100 agents with score 0-100, verdict LEGIT, SUS or BOUNCED, rank, clean paid…
Locus x402 Services
Locus public pay-per-use API
OnChainDiligence
Sanctions-screen an EVM wallet address against the Chainalysis on-chain oracle (OFAC, EU, UN designated addresses). Returns a clear sanctioned /…
mcpfax-markets.bowling-anthony.workers.dev
Crypto spot prices — Coinbase spot prices for up to ten assets.
mev.halowerk.com
AMM Invariant Monitor analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an…
NBU Data Ukraine
National Bank of Ukraine key policy rate (облікова ставка) on a date, with the overnight deposit and overnight loan rates and every policy-rate…
nursing-home-screen.iykykblog.workers.dev
Nursing-home quality verdict by facility name or CMS Certification Number (CCN). Returns CMS five-star ratings (overall, health inspection,…
onvexia.com
Topic ranking. Ranked social topics for a window. Returns topics + window_hours.
paket.halowerk.com
Takes a file digest and answers which released package version it is. Useful for an artefact found in a container layer, a build directory or an…
paulgraham.persona.energy
Search Paul Graham's source corpus — a source-grounded persona of the Y Combinator co-founder and essayist, built from 13,000+ cited sources: his…
OmniProvider
Pay-per-call chat completion on the small tier. One request returns one assistant message, limited to 8000 input and 1024 output tokens, at 0.008…
paylyte.ai
Recent significant earthquakes from the U.S. Geological Survey, with time, magnitude, and event ID.
play.0000402.xyz
Pay $1.00 USDC to play Rock Paper Scissors against the server. Win pays 2.0 USDC, tie pays 0.5 USDC, loss pays nothing. Network: Base Mainnet. Each…
List supported countries
List every ISO 3166-1 alpha-2 country code for which a postal-code pattern is available.
Generate QR code
Render text (URL, vCard, Wi-Fi config, …) as a QR code — SVG string or PNG data URL.
Random integers
Generate one or more uniformly-distributed random integers in an inclusive [min, max] range.
RealEstatePulse
US real estate and mortgage — 30yr/15yr fixed rates, ARM, housing starts, permits, Case-Shiller HPI
research.halowerk.com
Searches the official EU open data portal and returns datasets with what decides whether they are usable: the licence, classified by whether…
Compare versions
Compare two semantic versions and report which is greater (precedence-aware).
Market & Brand Sentiment
Market & brand sentiment for any keyword, brand, ticker or product: analyses the sentiment of web & news content mentioning it and returns an…
Seoul Weather API
Real-time Seoul weather — temperature, sky, humidity, wind (KMA official data)
nsgoods Plug-in Solar Legality
Signed plug-in solar legality record for one US state. Free preview: GET /solar-legality/preview A missing or unknown state returns 400 or 404; you…