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.
Broken Key Remapper
Purchase and download the Broken Key Remapper software (one-time license).
Bytemine
Read any company page in real time and return clean structured content, links, metadata, and the detected tech stack. Data is fetched live from the…
ca-cm-kg.ai
One paid call on ca-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of…
canada-entity-verify.iykykblog.workers.dev
Verify a Canadian federal corporation by name: corporation number, status (Active/Dissolved/etc.), incorporation (anniversary) date, governing…
capitalmarketsknowledgegraph.ai
One paid call on capitalmarketsknowledgegraph.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a…
capitalmarketsknowledgegraph.org
One paid call on capitalmarketsknowledgegraph.org for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a…
ch-cm-kg.ai
One paid call on ch-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of…
chess-eval.x402supply.com
Evaluate a chess position with Stockfish: best move, centipawn/mate score, principal variation, and optional multipv. No mocks — a real…
citation-overlap-checker.mekler.ai
Inspect citation overlap before counting corroboration. Supply 2-10 URLs, optional article HTML and citation chains. Returns duplicate URLs, shared…
Clarity Property Investments
Clarity Property Investments: one UK postcode district's buy-to-let figures (entry price, authority yield by property type, growth, crime, demand,…
cm-kg.org
One paid call on cm-kg.org for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of…
cm-record.ai
One paid call on cm-record.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of…
cm-record.io
One paid call on cm-record.io for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of…
college-verify.iykykblog.workers.dev
Verify any US college by name or IPEDS UNITID. Returns tuition (in-state/out-of-state), selectivity (applicants, admit rate, yield), enrollment, and…
colorado-entity-verify.iykykblog.workers.dev
Verify a Colorado business entity's status: formation standing (Good Standing / Delinquent / Dissolved), entity type, formation date, principal…
CostPulse
Cross-region AWS price comparison. Find the cheapest region for any service in one API call.
Crawl4Agent
Turn a URL into LLM-ready Markdown with crawl4ai's /md contract: f raw|fit (raw or pruned fit_markdown), q optional user query, c cache flag.…
dartapi.ljaysk.com
Korean corporate disclosure (DART) event stream, cursor-based delta. All filings, classified with importance score.
Ax3lflores
Data Cleaner - Clean, validate, standardize and deduplicate tabular datasets, preserve originals, and produce Excel, PDF, JSON or TXT export reports…
data-gateway.jonathan-royere.workers.dev
Lookup WHOIS records and domain availability in JSON format. Provide the domain name via ?domain=example.com to query registrar, status, and…
Actor, API & Scraper Monitor
Catch drift when everything still looks green. Check available Apify Actor run history and sampled output for schema drift and unexpected empty…
de-cm-kg.ai
One paid call on de-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of…
decipherranker.com
Get a detailed merchant deep-dive by wallet address. Returns volume stats, buyer diversity, trend signals, and recommendations.
DeFiRisk
Cross-protocol risk-adjusted DeFi yield screener: ranked pools with honest base-vs-reward APY split, trap flags, and 0-10 risk overlay
DEO Math
Evaluate whether a mathematical research branch should continue, revise, abstain, or escalate.
Locus x402 Services
Locus public pay-per-use API
JSON Repair
Conservatively repair common JSON syntax errors (unquoted keys, single-quoted strings, trailing commas) and parse the result; input is never…
DNS Doctor
One DNS Doctor bulk scan of 2-50 domains in a single call, priced per domain.
Locus x402 Services
Locus public pay-per-use API
Locus x402 Services
Locus public pay-per-use API
enrich-api.interzoid.com
Interzoid batch data enrichment. No file needed, JSON in and JSON out: POST up to 100 records as a JSON array (objects such as…
eu-award-verify.iykykblog.workers.dev
EU public-procurement award track record for a supplier: contract-award counts, total awarded value in EUR (as published), contracting authorities,…
EU Trademark Search (EUIPO)
EU trademark search (EUIPO) — find registered and pending EU trademarks by name, optionally filtered by Nice class; returns trademark names,…
facility-verify.iykykblog.workers.dev
Verify a US healthcare facility by CMS Certification Number (CCN). Returns Medicare certification status, provider type, bed count, ownership type,…
Skuuy File Drop
Use this when you need to share a file with another agent or a human: upload base64 content or a URL and get a short-lived, zero-log download link…
fr-cm-kg.ai
One paid call on fr-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of…
free-api-resell.relayhop.workers.dev
Polymarket prediction-market listings. Query: ?limit=1-100. Source: Polymarket Gamma API (free).
FundFlow
Institutional (13F) ownership & flow for a stock (?ticker=<stock ticker>)
gankdat
UK procurement notices. Public procurement notices from the official Find a Tender OCDS feed, flattened to one queryable schema. Blind Mode: no…
gecko-toll-production.up.railway.app
Coin price in USD
GeoPulse
Real-time geopolitical risk signal — base score + live news sentiment for any country or region
Geocode an address
Convert a free-form address or place name into ranked coordinates with a structured, normalized address. Optionally bias by country and language.
Korea Business Status (NTS)
사업자등록번호를 넣으면 국세청 기준 사업자 상태(계속·휴업·폐업), 과세유형, 폐업일을 돌려줍니다. 한 번에 최대 100건, 인증키 불필요. Korea business registration status check: given Korean business…
HMAC data
Compute a keyed HMAC of some data with a secret key — the standard way to sign and verify webhooks (Stripe, GitHub, etc.) and API requests. Data and…
holdings-13f-verify.iykykblog.workers.dev
SEC Form 13F aggregated holdings verdict: by manager (name or CIK) get the latest-quarter portfolio total, position count, top 10 holdings and…
hospital-screen.iykykblog.workers.dev
Hospital quality verdict by facility name or CMS Certification Number (CCN). Returns the CMS overall star rating plus per-measure-group verdicts…
Validate IBAN
Validate an IBAN (mod-97 checksum, length, country format) and decompose it into country, bank, branch and account parts.
Validate against JSON Schema
Validate a JSON value against a JSON Schema (draft-07, with the standard string formats enabled). An invalid schema is rejected as a clean 400…
x-preflight
X Preflight: read a draft post against X's open-sourced ranking code. Returns what is already settled before you post, whether it enters the pool…
kristo-intelligence-api.onrender.com
Live DeFi trading signal: action, confidence and one-line reasoning for ETH/ONDO/KAITO/DEGEN — refreshed under 5 minutes from live market data.
LeaseEdge
BLM lease auctions, expiring leases, active lease portfolio analysis — oil/gas, geothermal, grazing rights. $0.15/report via x402 on Base.
LiquidityPulse
US market-liquidity & financial-conditions macro signal (no params)
Blue Cap hash.compute
Compute a SHA-256 digest for customer-supplied UTF-8 or base64-decoded bytes through a stable machine endpoint. Returns the reproducible digest…
Make Me Look GIFs
Animate a photo of a person, or a paid generation, into a short looping GIF from a motion prompt, no account needed
Viridis Agent Fleet
Energy and climate compliance regulation scan across a curated 14-regulation database, with jurisdiction, urgency, and effective-date signals,…
med.halowerk.com
Resolves two products to their RxNorm concepts and compares what the register declares about each: the active ingredient set, the strength per…
memory.fluidrack.com
Create namespace
MENAPulse
MENA regional macro + geopolitical stress pulse (no params)
Locus x402 Services
Locus public pay-per-use API
mobilitychain.kr
Korean mobility and EV supply-chain intelligence, sold per query. Structured feed tracking Korea's automotive-electronics and robotics supply chain…
mosaisley.com
A round for the house: one drink each for the next 5 patrons who stop by, each told who it's from.
MYC Federal Contract Changes
Detect material state changes with prior/current comparison, evidence, and provenance, applied to SAM.gov federal contract opportunities. Identify…
n8n.eotrends.com
Summarize and classify a text (up to 4000 characters). POST a JSON body {"text": "..."}. The summary is written in the language of the input text.…
Agent News Hub
Groups managed news feeds into events when an agent needs a compact news briefing. Supply topic, language, time window and result limit using the…
onchain-toolkit.bowling-anthony.workers.dev
Live gas price on Ethereum, Base, Arbitrum, Optimism or Polygon, in gwei plus the cost of a plain transfer. Compare several chains in one call.
osha-safety-screen.iykykblog.workers.dev
Employer workplace-safety verdict from OSHA enforcement data: inspections, violations (serious/willful/repeat), penalties, and…
paid-mcp-opportunity-lab--taylorboucher1.replit.app
Read official Base Uniswap V3 NFT and pool state at one canonical block hash. Reconcile exact token inventory and fee-growth checkpoints against…
PaidPilot Invoice API
PaidPilot Invoice API: Render one invoice PDF from JSON. Line items, tax, discount and totals computed server-side (integer minor units); 12…
PDF Text Extraction
Extract plain text and metadata (title, author, producer, page count) from a PDF supplied by URL or base64 — heavy pdf.js parsing an agent can't…
perm-sponsor-screen.iykykblog.workers.dev
Look up an employer's PERM (permanent labor certification / green-card sponsorship) filing history from public DOL OFLC disclosure data, fiscal…
pfad.halowerk.com
Prüft am Objekt alternate den Befund Länge des Ankertexts.
PharmaCatalyst
Upcoming biotech clinical-trial catalysts (?ticker=<biotech ticker> or ?company=)
Parse phone number
Parse, validate and format a phone number — E.164/national/international/RFC 3966, region and line type (syntactic validation, no carrier lookup).
physician-payment-screen.iykykblog.workers.dev
Screen a US physician by NPI against CMS Open Payments (Sunshine Act) general-payment records. Returns total reported payments, payment count, top…
TCP Port Scanner
Give this API a hostname or IP address and it tries connecting to each port in your requested range. For every port that answers it reports whether…
postweg.halowerk.com
Prüft am Objekt caa-eintrag den Befund Zahl der CAA-Einträge.
Inspect x402 endpoint
Fetch any URL and, without paying, decode its x402 402 Payment Required challenge: price (atomic and formatted for known stablecoins), asset,…
promptqualityscore.com
Quick pre-flight quality score: composite (0-100) + grade (A-F) + three framework sub-scores (PEEM, RAGAS, G-Eval) + verdict. Run upstream of any…
protocol-tvl-brief.x402supply.com
Compact DeFi protocol brief by slug or name: current TVL, 1d/7d/30d TVL change, TVL by chain, category, chains, audit links, fees and revenue for…
provider-verify.iykykblog.workers.dev
Verify a US healthcare provider by NPI or name against the CMS NPPES registry: entity type (individual/organization), primary taxonomy specialty,…
Bulk QR Code Generator
Send a list of texts — website addresses, phone numbers, plain words, WiFi details, anything — and get back a ready-to-use QR code image for each…
Random Choice
Cryptographically secure random picker for 2-100 JSON choices. Use for low-stakes one-off random or weighted selection, unbiased tie-breaking, and…
Domain registration
Look up a domain's RDAP registration data — registrar, status, creation/expiry/update dates, nameservers and DNSSEC. Unregistered domains return…
Skuuy Read
Skuuy Read — URL to clean Markdown (100 reads/day free)
Reformed Connect
Fetch worship service times for one Reformed church by stable UUID. Only the schedule fields already shown on the public share page, plus name,…
DeAI Artifact Gateway
DeAI artifact gateway: reuse (package_check). Deterministic JSON with byte-exact quotes for $0.0100; no crawl, no bot walls.
revert.wtf
Paid hosted deterministic explanation for EVM/RPC/wallet/UserOperation/x402 errors. Send raw pasted error JSON, text, or revert bytes.
RiskPulse
Business risk, market-entry risk, country expansion risk for any country worldwide. Returns regulatory quality, corruption, rule of law, IP…
SanctionsScreen
OFAC SDN sanctions screen for a name / entity / wallet (?name=)
Sanctions List Screening
AML/KYC sanctions and PEP screening for a person or company: OFAC, EU, UN, UK OFSI, SECO, BIS, World Bank + 125 national lists. Named-source match…
Wicked Sanity
Verify a claim against supplied context or live web evidence.
schild.halowerk.com
Prüft am Objekt cookie den Befund Wert der CSP-Kopfzeile.
combify-data-api
Multi-source social+dev data query (dynamic per-request USDC price)
Payment-Injection Screen
Payment-Injection Screen by Agentropolis: send text your agent is about to act on (tool result, web page, email, file). Flags payment-looking…
SendQuoteNow
Generates branded, customer-ready quotes and estimates as hosted PDFs in about one second — line items, tax, discounts, a hosted approval page, a QR…
sentinel-agent.dev
SENTINEL pre-execution safety verdict
SEO Data Extractor
Give this API a web address and it will visit that page, then hand back everything an SEO professional needs to know: the page title, meta…
ShieldForm
Invisible bot protection. Score form submissions 0-100 based on behavioral signals. No CAPTCHAs.
Shopify AI Rank Checker
Checks how well a Shopify store's products show up when AI shopping assistants such as ChatGPT, Gemini, Perplexity, Grok, and Copilot search for…
Agent Screenshot Hub
Viewport or full page, optional element selector, dark mode and cookie banner removal. Returns base64 image plus a short lived fetch URL, byte size,…