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.
fetchwerk Web Extraction
Read the mandatory public disclosure of one domain and return company, postal address, e-mail, phone, VAT and register data with a source for every…
DataStore API
Store JSON or a file (up to 25 MB) privately for 7 days and hand it to a human or another agent with a signed link or a password-protected address.…
furigana.agentic-jp.com
Convert kanji-mixed Japanese (JP) text to hiragana, katakana, or romaji (Hepburn/Nippon/Passport), with a per-token breakdown of surface form,…
HazardPulse
Global (or per-country) natural-hazard / disaster alert signal (optional ?country=)
HerbaPulse
Home remedy protocol compiler — practical, safety-railed preparations for a condition or a named remedy: real ratios and steps (teas, tinctures,…
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…
mailferret.appin60.com
Find a person's verified work email from first name, last name and company domain. Live SMTP check against the company's mail server, catch-all…
Mem0 Cloud
Search your stored memories by meaning, like mem0's search: embeds the query and returns the closest memories with a relevance score from 0 to 1.…
MindPulse
Postpartum and perinatal mental health guidance for parenting and mental-health agents. Distinguishes baby blues from postpartum depression, covers…
Round to minor units
Round an amount to a currency's minor units (or an explicit minorUnits) with a chosen rounding mode: half-even (banker's, default), half-up,…
Number to words
Spell an integer out in English words, e.g. 123 → "one hundred twenty-three". Negatives are prefixed with "minus".
openwebninja-x402.vercel.app
Fetch current Amazon deals.
CF Package Check
Is this WordPress plugin, npm package or PyPI project abandoned? Status, 0-100 abandonment-risk score, months since last update, and the signals…
ParentPulse
Positive discipline and toddler tantrum guide for parenting and family agents worldwide. Age-appropriate behavioral strategies, in-the-moment…
Quack AI
Paid API that reads a full DAO proposal and returns a structured voting recommendation with reasons.
QuokkaPix Agent Unlock
QuokkaPix image agent unlock for image-standard. Media stays local on the user's device.
Records for Agents
Search US federal product recalls (CPSC consumer products, FDA food/drug/device enforcement, USDA FSIS meat/poultry recalls, NHTSA vehicle…
ApiToll Reddit Search
Reddit search scraper — keyword-search all of Reddit, or scope to one subreddit, for AI agents. Find posts matching any query, sorted by relevance,…
nsgoods Crypto Market Regime
CMC regime classification + strategy spec (USDC pay-per-call). Free preview: GET /regime/preview A bad or unsupported id returns 400; upstream…
OnRamperX
OnRamperX is a non-custodial value router for agents and humans: fiat<->crypto and cross-chain via one quote interface (Coinbase Onramp v2, Relay,…
Sandboxd Code Run
Runs a shell command in an isolated one-shot sandbox and returns stdout, stderr and the exit code (Daytona ExecuteRequest/ExecuteResponse compatible)
seo.forgemesh.io
Correct likely spelling errors in an SEO query
SSL/TLS Certificate Check
SSL/TLS certificate check: expiry, issuer, SANs, chain validity, hostname match, negotiated protocol/cipher, and weak-algo warnings for a public…
StablecoinPulse
Stablecoin peg tick — USDT, USDC, USDS, DAI, USDe, USD1 in ONE $0.01 call: live price, deviation from $1, 24h change, and a deterministic STABLE /…
TechAnalysis
Full technical analysis — 18 indicators + AI signal summary
Techforce Agents All Events
Local events on demand from AllEvents — event name, category, date & time, venue, city, and ticket link. Get results for $0.02 per record (minimum…
token-risk
Deterministic on-chain structural risk report for an ERC-20 token on Base. Keyless x402-native payment — no signup, no API key. Reports STRUCTURAL…
travel-agent.forgemesh.io
Returns a short list of transit provider matches (name, ID, transportation modes) for a location and transport type. Use to identify rail, metro,…
Inspect a code point
Resolve a single code point (given as 'char' or 'codepoint') to its name, general category, block, script and plane. Provide exactly one of the two…
Liquid State
Decision Leg invalidations. Per-call USDC.
Olive Marlin
x402 catalogue change history - Returns the observed change history of the public x402 facilitator catalogue: the newest appearance, disappearance,…
WebberSites x402 Data API
IP geolocation: country, region, city, coordinates, and timezone for any IPv4 or IPv6 address. Fast in-memory lookup for analytics, fraud, and…
x402.onlybots.shop
Token-efficient web reader: URL in, clean deduplicated article markdown out, with token count header. Boilerplate, nav, ads stripped — typically…
x402check-base
Read-only Base mainnet data: GET /base/block, /base/tx?hash=, /base/balance?address=, /base/erc20?token=&holder=, /base/gas. Small JSON payloads…
x402endpoint-924155002144.us-west2.run.app
Water-Saving Dual-Function Handle
yield.trdefi.com
TRDEFI prepare request
ZeroWorker MCP Trust Gate
MCP security checks and feedback for users and developers. Choose paid access without reports, or ongoing free access within limits: POST…
5108-x402.community.iamstarchild.com
Get real-time spot price and market data for a cryptocurrency
Protocol Radar - Aaron Zhang
x402 protocol updates as JSON: recently merged changes in the x402 Foundation repository (formerly coinbase/x402), latest tags, and current npm…
Agent Miner Tools
Use before spending tokens, money or crawler capacity fetching an unfamiliar web resource. Resolves redirects (manually, bounded, re-validated per…
agent-kg.ai
A signed statement of the office's current holdings summary for $0.01 USDC — Agentic Private Office — Matthew Keddy: shareholdings, hyperscaler…
Locus x402 Services
Locus public pay-per-use API
Additive Atlas
Find the additives named on a food label and return, for each, the cross-axis derivation across jurisdictions
AgentWork Web Evidence
Website change monitoring / webpage change detection — text_sha256 or previous_text diff for documentation, pricing-page, changelog and policy…
basefeed
x402 settlement test
CueFrame
Validate a composition body without saving it (dry-run)
OpenRelay
OpenAI-compatible chat completion. Pay per request in USDC via x402: no signup, no API keys. Price scales with prompt size and max_tokens.
PayPerScreen
IP risk check (beta) for logins and checkouts: is a public IPv4 address on the Spamhaus ZEN blocklist (spam, botnets, hijacked networks) or a Tor…
Polymarket Intelligence API
Ranked Polymarket market-flow screener with factual concentration and liquidity-compatibility fields for the observed window. BEFORE YOU PAY: free…
Hijri Date Converter
Convert Gregorian dates to Hijri (Umm al-Qura calendar) and back. Returns day/month/year, Arabic and English month names, and a formatted Arabic…
RxAtlas
Search US drug products by NDC, brand, generic name, ingredient, manufacturer, dosage form, route, source, or identifier.
api.thetrustlayer.xyz
Agent profile lookup. Returns trust score, component breakdown, feedback counts, and metadata for any ERC-8004 agent.
Chit402
Signed spend receipts for agent x402 payments — who paid which call, verifiable by a third party. Treasury desk and possession book for agent spend…
automaton.72.62.51.224.sslip.io
German calendar and business-day deadline calculator with public holidays per Bundesland
Bacon Services
Web Image Optimizer: Resizes one image so its longest side is at most max_width pixels (never enlarging it) and encodes it as WebP at the given…
blockint.ai
Screen a blockchain address against the official OFAC SDN list and public C3 reports. Returns a suggested action (BLOCK on an OFAC SDN match, REVIEW…
Broken Key Remapper
Purchase and download the Broken Key Remapper software (one-time license).
Bitcoin Tech Radar - Aaron Zhang
Status of every Bitcoin Improvement Proposal as JSON: number, layer (consensus soft fork, peer services, applications), title, type and status…
Color scheme
Generate a harmony scheme (complementary, analogous, triadic, tetradic, monochromatic) from a base color.
ComputePulse
GPU compute spot prices — best deals across Vast.ai, RunPod, AWS, Lambda + market signal + AI brief
Transcode between character sets
Decode a base64 byte buffer from one character set and re-encode it into another (utf-8, utf-16le, utf-16be, latin1, ascii). Characters that the…
CF Enforcement Check
Full enforcement report: every matching record with title, date, agency, court, case number, case type, official source URL and courtpls.com page…
CF Exclusion Check
Full exclusion report from the HHS-OIG LEIE, SAM.gov, and 16 state Medicaid lists: every match with agency, dates, NPI, UEI and CAGE.
fetchdelta.com
FetchDelta: fetch one public web page as Markdown with title, headings, links and source timestamp. Use for current docs, changelogs or policy text.…
Financial Analyst API
Multifamily acquisition underwriting — mixed unit mix through a monthly proforma to unlevered AND levered project returns (IRR via XIRR + equity…
FranchisePulse
Franchise broker landscape for franchise-buyer and entrepreneur agents. Returns consultant commission conflicts, fee-only alternatives, questions to…
gate402
Fetch any public URL, render client-side JS, strip nav/ads, return clean LLM-ready Markdown.
Google Patents Search & Data
Google Patents search — find patents by technology, inventor or assignee with date, country, legal-status and classification filters; clean JSON…
Graph Advocate
On-chain x402 settlement summary for an address from the decentralized x402 Base subgraph on The Graph Network. POST {address}. Returns lifetime…
HoldsUp
Published fact-checked episodes, newest first, with optional filters by category slug, show id or speaker slug. Paged.
InsurePulse
Insurance rate optimizer and lower-my-premium plan — explains why a policy is expensive and exactly how to reduce it (discounts, deductible moves,…
Subnet calculator
Compute network details of a CIDR block — network & broadcast address, usable host range, total and usable address counts. Works for IPv4 and IPv6…
k-data-x402-production.theblack1022.workers.dev
Current USD/KRW exchange rate (ECB reference via Frankfurter, fallback open.er-api.com).
Keyless
LLM chat completion with no API key or signup (fast open model, meta-llama/llama-3.3-70b-instruct). OpenAI-compatible: set your SDK base URL to…
Keystone Opportunity API
Deterministically score a task brief for deliverables, acceptance criteria, deadlines, constraints, and usable scope before committing time. No AI…
LION Verified Company
Keyless multi-chain JSON-RPC reads, Base + Ethereum, from $0.001 (?chain=ethereum)
locus.report
Returns cited land use, acreage, year built and legal jurisdiction for an address or jurisdiction-scoped parcel id. Returns the same records as…
Alien Probe
Decode a VIN's structure: NHTSA vPIC WMI snapshot, vintage 2026_08: 10659 rows cut in ascending WMI order from 12971 candidates, plus the…
Machine Observer
Machine Observer premium historical snapshots across machine commerce, trust, likeness, API/data, compute, model/tool supply, and developer-adoption…
MacroPulse
US macro intelligence — Fed rate, CPI/Core PCE YoY, yield curve, M2 money supply, GDP, VIX, crypto Fear & Greed, AI macro regime narrative
MailPulse
Check the status and tracking of a physical letter previously sent via POST /api/letters. Returns render status, expected delivery date, and (for…
Batch Readiness Scan
Bulk agent-readiness screening for agencies, VCs and portfolio owners: scan up to 50 URLs in one paid call ($0.02/URL, $0.10 minimum) and get a…
Prime factorization
Prime-factorize a positive integer (≤ 10^15 so the computation is always fast). Returns the prime factors with exponents, the divisor count, and…
NutriPulse
Ultra-processed food check for one real product — scan a barcode (EAN/UPC) and get the NOVA processing group, Nutri-Score, full additive census with…
openworker.etips.me
Returns a single, verifiable snapshot of any EVM wallet: native balance, ERC-20 token balances, current block number, and recent activity count…
OptionsFlow
Options flow intelligence — unusual activity put/call ratios large block trades
Parallax
The funnel, honestly, for one seller over the indexed window: settled USDC and purchases, distinct buyers, organic share after self-test exclusion,…
Peru Rates and Inflation
Latest Metropolitan Lima, Peru consumer price index (CPI) inflation from INEI via BCRP: monthly percentage change for inflation and purchasing-power…
Local business directory search
Google Business Profile and Google Maps local business search API: find businesses within a radius of a coordinate, filtered by category and/or…
Readability scores
Compute the standard English readability formulas — Flesch Reading Ease, Flesch–Kincaid grade, Gunning fog, SMOG, Coleman–Liau and ARI — along with…
redlynr.com
Agent guardrail decision engine. Call once before every agent action; returns a single decision — proceed, slow down (with a reason and wait time),…
Find matches and capture groups
Find the first match (or all matches with all=true) of a RE2 pattern, returning each match's text, start/end offsets, and numbered and named capture…
SafePulse
Brand safety score for consumer and shopping agents. Returns a recall-history-based safety score for any brand, grounded in CPSC and FDA data.
SCOPE Research API
Research a company and return company intelligence using current public sources. Covers business facts, products, competitors, competitor analysis,…
SEC Filings & Financials
SEC company financials by ticker — normalized annual and quarterly revenue, income, balance-sheet, cash-flow and EPS facts.
Spreadsheet References
Parse an A1-style cell reference (e.g. "B3" or "$AA$100") into 1-based row and column numbers, plus the column letters and whether each part is…
Deepline GTM API
Enrich Company — merged 30+ field profile from Apollo, Crustdata, and PeopleDataLabs: revenue, headcount, industry, funding, valuation, tech stack,…
SubmitCheck
Launch directories from 11 popular public lists that were dead, unreachable, erroring or redirecting to another site on our Oct 2026 live check (DNS…
Diff text
Diff two texts. The default `unified` mode returns a unified-diff patch string; `lines`, `words`, and `chars` modes return a structured array of…
uk-company-check.fly.dev
Search the official UK company register (Companies House) by company name. Returns up to 10 matches with company number, status, incorporation date…