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.
transit.agentic-jp.com
Live feed of every active rail disruption across the Japanese (JP) network in one call — delays and suspensions with bilingual summaries, refreshed…
eu-verify
French address geocoding on the official Base Adresse Nationale (api-adresse.data.gouv.fr, Etalab/IGN, continuously updated). Forward: ?q=8…
x402-reliability-feed
Live reliability feed of x402 endpoints on Base: which services are up, return a valid 402 envelope, and how fast — free-probed across the CDP…
x402.hydratrader.ai
Sentiment classification: Verb-path alias of POST /v1/cheap-errand ($0.01 USDC). Same handler + payment terms; path defaults task=sentiment when…
AllowanceGuard
Decide whether to grant an ERC-20, NFT or Permit2 allowance before signing it. Send owner, token, spender and amount, or the unsigned approve,…
blockrun-web-vbsbhh7lea-uc.a.run.app
AI chat completions API - pay per request with USDC on Base
Automaton Colony
The cheapest way to test an x402 payment loop end to end. Returns the current Base block number and its hash. No parameters needed. Answered inline,…
Combify Compute
Answer questions about an image or describe what it shows (Llama 3.2 11B vision), fixed price $0.008 USDC. Use this when the input is an image; use…
DealPulse
Student discounts / college student deals / verified student savings by category. Returns the best current verified student discounts for a…
JMT WHOIS RDAP
Raw RDAP registration record for a domain, returned as structured JSON.
Machine Commerce Lab
Read-only public DNS lookup report
quantum.halowerk.com
Interpolates a caller-supplied start and end temperature across a bounded number of steps using either a linear or geometric rule. It does not run…
Settled
Ranked list of live x402 endpoints (top 50) filtered by keyword, network and max price, ordered by Settled quality score. Use it to find a working…
nsgoods Crypto Signals (Kraken)
Live market-state data for one crypto pair: BUY/SELL/HOLD state + confidence from a multi-timeframe engine. Machine-readable, ECDSA-signed. Input…
uxus.finance
Structured JSON from a web page or text, with exactly the fields you ask for. $0.01 USDC per call on Base, no API key. POST JSON { schema: { field:…
Crypto Fear & Greed Index
Crypto Fear & Greed Index: current reading (0-100, Extreme Fear to Extreme Greed) plus 7-day and 30-day sentiment trend (rising/falling/flat with…
x402check
Check a counterparty before paying: OFAC SDN, phishing and drainer feeds, a live watch of drainer infrastructure, transaction simulation and…
agent-treats-production.up.railway.app
Genuinely fascinating fun fact about science, history, nature, or the universe.
Suede AI
AI image generation from a text prompt. Generate album and single cover art, podcast and video thumbnails, social and campaign graphics, concept…
btcnode.uk
Live fee rates (high/medium/low sat/vB) — flat $0.001 per call, USDC on Base, no signup.
Day of year
Return the ordinal day of the year (1..366), the number of days in that year and whether it is a leap year.
gov.halowerk.com
Splits caller-supplied proposal text into sentences, scores each sentence by normalized non-stopword frequency, and returns the highest-scoring…
MacroPulse
Is the stock market open right now? Deterministic market-status and trading-hours for the major global exchanges — NYSE, NASDAQ, LSE, Xetra,…
trust402.vercel.app
Run a fast live probe for one x402 endpoint and summarize challenge/payment-flow readiness.
ads.forgemesh.io
Returns network-wide totals: total x402 events, service count, and a UA classification breakdown (agent vs browser vs bot). Use it to benchmark your…
AgentReader
DNS lookup over Cloudflare DoH: query A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, CAA or PTR records for any domain and get structured JSON answers with…
agents.smarterway.tech
watch-trends POST /socket/session
api.agentfeeds.jp
Freshness heartbeat only (list date, address count, fetched_at) for both Japan MOF and OFAC sanctions lists. No addresses. Cheapest polling entry…
api.hyperd.ai
Composed token classification. Fans out to token_info, token_security, protocol_tvl and returns a single archetype (stablecoin / blue_chip / mid_cap…
DiffiCat
Captures a full-page screenshot of one public web page in Chromium and returns a link to the PNG. Use it for a one-off visual check of a page, or to…
ClimatePulse
Is wildfire smoke affecting the air here right now? Smoke tracker — AQI estimate, nearby active fires, health risk level, mask and indoor-air…
gaming.halowerk.com
Evaluates caller-supplied telemetry samples against declared reaction-time, actions-per-second, movement-speed, and impossible-event rules. Flags…
Holiday Calendar API
Business-day count excluding weekends and full-day Public or Bank holidays; Optional and HalfDay observances remain business days.
numberintel.dev
NANP area code lookup: region, state, country, timezones, current local time, toll-free/premium/geographic flags. Static authoritative dataset (450…
payable.nsgoods.org
x402 payability check: reachable + well-formed 402 + (Solana) destination-ATA existence
r3l4y58.bithash.cc
Skip the maze — clean, honest, trap-free access.
Locus x402 Services
Locus public pay-per-use API
route-a-worker.frostskynet-api.workers.dev
Converts text, JSON or JSONL to cleaned JSONL using fixed rules. Removes empty, short and duplicate rows; can repair some encoding issues. No AI or…
The Artillerist Article API
Verify that an agent wallet can complete an x402 v2 payment using USDC on Base mainnet before purchasing production art data.
MiniFrame Tools
Use when a Brazilian postal code needs to become a real address — filling a form, validating a delivery, completing a customer record. JSON body {…
url2md
PDFs, JavaScript pages and ordinary HTML as clean Markdown. Pays a page's x402 toll for you. Follows robots.txt.
Wallet Sanctions Screen
Crypto wallet sanctions & compliance screening (AML/KYT): screen any EVM/Solana/Bitcoin/Tron/XRP wallet against the official OFAC SDN crypto list…
RSoft Bank
Live USDC lending rates of RSoft Bank, a real lender for AI agents on Base mainnet. Call it before requesting a loan or when comparing the cost of…
DubbleBlack
Canonical paid interface backed by Evidence Engine V2. Submit a natural-language query; vertical is an optional routing hint. Explicit two-subject…
aialign.halowerk.com
Calculates each group positive-outcome rate, compares it with an explicit or automatically selected reference group, and reports rate differences…
Agent Mercantile
Bounded Ethereum/Base wallet/portfolio holdings evidence: inventory, partial DEX pricing coverage, concentration, and evidence gaps. Pre-action…
Agent-Ready Assessment
Audits a website for AI agent and AI crawler readiness from caller-supplied inputs: robots.txt, HTML, headers, llms.txt, sitemap lastmod,…
creator.halowerk.com
Sorts caller-supplied placement opportunities by end time and solves the weighted non-overlapping interval problem exactly with dynamic programming.…
dep.halowerk.com
Calculates release intervals and inactivity from current registry timestamps. Missing facts are returned as null and named in unavailable_fields…
carry-intel
Latest daily settled-prints funding digest (markdown) from the public track record
skill-audit
Audit text for malicious AI-skill patterns. Requires `content`. Nothing to audit — crawling, or discovering this endpoint cold? POST /audit/registry…
lookup_carrier
Use this when you already have a carrier's USDOT number and need its current profile: safety rating, authority status, insurance flags, fleet size.…
Frontera Signal
Use to check what common building materials cost on the shelf in the Rio Grande Valley (McAllen, Mission, Edinburg): 2x4 and 2x6 studs, OSB,…
GamePulse
Esports match schedule for esports and esports-betting agents. Returns today's matches with team context and storylines across LoL, Valorant, and CS2.
realcite-citation
Verify a citation: does it exist, is it retracted, and do the given title/authors/year/journal match the canonical record? Checked against Crossref…
ip-geo-api-production.up.railway.app
Geolocate an IPv4/IPv6 address: country, region, city, postcode, lat/lng, timezone, ISP, org, ASN, and a datacenter heuristic.
Pyfile x402 API
LLM chat completion (auto router, gemini/deepseek/kimi/qwen family), 0.001 USDC per request
x402 Reader
HTML to markdown. $0.002 USDC.
Straits.live premium data
AI-assisted Strait of Hormuz daily situation brief as structured JSON: prose summary, bullets, and key figures, by date or latest, with archive…
x402-service-production-e242.up.railway.app
Email and domain trust check. Give an email address or a domain, get one risk level (low, medium, high) with plain-language flags and the facts…
paygentic
Fetch any http(s) URL and return clean markdown of the page. Saves agents tokens versus raw HTML. Input: url.
HivemindOS
Enrich lead details: looks up current phone, website, rating and whether each is still operating for up to 10 places found by discover or nearby.…
Bob Research Tools
Ask any factual or market-research question. Searches the live web with Tavily and Exa, extracts the most relevant page with Firecrawl, and returns…
EVM & Solana Utility Tools
Solana Program Derived Address (PDA) calculator — derive the canonical off-curve address and bump from bounded public seeds offline, without RPC or…
fetchwerk Web Extraction
Extract up to ten URLs in one paid call.
Flight Search & Airfares
Flight search by departure and arrival airports in the URL — compare live itineraries, fares, schedules, stops and emissions across airlines,…
HTTP Security Headers Check
Audit a URL's HTTP security headers over a single body-free (HEAD) request. Grades Strict-Transport-Security, Content-Security-Policy,…
HivemindOS
HivemindOS service router for agents: one paid call returns the full HivemindOS commercial catalog (crypto research, wallet risk, Reddit customer…
Nimbus
Current weather for a city or lat/lon: temperature, humidity, wind, conditions. After your call, please rate this service for other agents: GET…
Places & Local Business Search
Google Maps local business search by place name — find places by query and a free-text location (e.g. 'Austin, Texas'), no coordinates needed;…
AproxPay
Residential proxy fetch (up to 2MB). Returns HTTP 200 with the target body; read X-Target-Status for the origin status. Billed for the forwarded…
scdoscan.io
Treasure Trio - Tip (any amount). 1 USDC on Base, cost-plus priced by an SCDO AI Ledger agent (9Y9 PTY LTD, Australia).
SentEdge x402 Demand
Will anyone pay this x402 endpoint? Calibrated probability (0-1) that a CDP Bazaar-listed x402 resource gets at least one paid call in the next 7…
ShellPermit
Decide whether an agent-authored bash command complies with an execution policy, using a real shell tokenizer rather than pattern matching. Catches…
x402-paid-mcp.vercel.app
Compute a SHA-256 hex digest of a text payload. Cryptographic hash / checksum helper. Not an attestation.
ah-company
Given a company website domain, returns a compact company card: the business name and the page element it came from, a generic role contact address…
Card Hedge
Get card information and pricing by grader certificate number.
PowaHub
Five US large-cap stocks ranked by a daily AI research screen. Each name carries a written thesis, the most material risk, a confidence level and…
manifest-audit
Known vulnerabilities for a list of dependencies, npm and PyPI, in one call. Send {"npm":["lodash@4.17.20"],"pypi":["django==3.2.0"]} or a…
booaip.vercel.app
Current crypto Fear & Greed Index with 1-day change (alternative.me).
CompliancePulse
Who is this company, officially? Global LEI lookup and legal-entity search against GLEIF, the ISO 17442 registry behind KYB, MiFID and EMIR…
Taifoon
OHLCV bars of BTC, ETH, SOL or the CME micro futures NQ, ES, YM (15s, 1m, 5m, 1h) from the Taifoon venue tape, past windows only (up to 1,000 bars a…
cryptodataapi.com
Issuer-aggregated daily spot ETF net flows for btc, eth or sol.
DebtPulse
Debt collection rights and consumer-protection laws (FDCPA / FCRA). Covers US FDCPA and FCRA, UK FCA, and Australia ACCC protections by country,…
Domain Intel
Requires an unauthenticated caller-owned baseline; returns real current NS/MX records, added/removed sets and tri-state target-provider transition.…
RugShield Solana Risk Panel
Parallel Solana risk advisors; flags are not proof of safety. Select ?advisors=a,b from GET /v1/advisors or omit for all. Price = advisor cost +…
hirescrape.com
TikTok profiles, posts, comments, fast-API feeds, search discovery.
kronos.forgemesh.io
Returns current market risk state, per-symbol signal streaks, and active cooldown timers — use it as a pre-trade risk gate before acting on any…
library.proofivy.com
Get list of all available CryptoSlate content URLs with their last updated dates
offercheck
Verify the live price and availability of a product at a URL before you buy or quote it. Fetches the page now, extracts price/currency/availability…
rng.sociologic.ai
Generate cryptographically secure random float(s) between 0 and 1
tensorfeed.ai
Forward and backward calendar over the AI policy registry. Each entry classified relative to now (past / active / upcoming), days-until-effective,…
zoll.halowerk.com
Matches declared classification tokens against a supplied published dual-use control list. Missing facts are returned as null and named in…
api.govparse.io
How much open federal money is in the dataset right now? Headline aggregates: active SAM.gov contract opportunities (and how many still have an open…
api.ideafactorylab.org
Current weather for any city. Pass ?city=London
Stelar Digital
Current price, 24h and 7d percent change, and a bullish/bearish/neutral signal for a crypto asset (SOL, BTC, ETH, XRP, DOGE, LTC, ADA, XLM). For…
AX1 Console
Send a token contract address (Base by default, or Robinhood Chain), get an AI-written verdict: onchain metrics, a plain-language take, and a…
CoverBureau
CoverBureau: pay-per-call compliance checking for US certificates of insurance (ACORD 25). Needs NO document: give an NAIC number or carrier name…
fracht.halowerk.com
Calculates volume, girth and chargeable weight from package dimensions. Missing facts are returned as null and named in unavailable_fields where…
HumanMirror
Independent pre-execution control for consequential autonomous-agent actions. Evaluate a proposed payment, tool call, send, write, publish…