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.
defi-ops-402
Best Arbitrum USDC venue for a given amount/risk, with optional deposit calldata
SourceLens
Inspect a public JSON, RSS, or Atom URL, detect its record structure, and return a normalizer-verified FreshDelta monitoring configuration with…
Delvorn
Delvorn public x402 test capability ASSET-TEST-FE2B3590
Exact dice statistics
Compute the exact probability distribution of a dice notation — mean, variance, standard deviation, min/max and the full probability mass function —…
DNSPulse
Domain & DNS intelligence — records, SSL certs, subdomain discovery.
X402 Doctor
Full paid x402 diagnostic JSON for a target endpoint.
Dragons Eye Lookup
Dragons Eye Lookup: Ransomware leak-site claim lookup by company name or domain. Returns ransomware-group claims (group, dates, country, sector,…
effectguard-x402-experiment.onrender.com
Coordinate agents sharing one account: reuse matching JSON reads within 30 seconds, or stop duplicate operations using a stable business event ID.…
contract-guard
Risk check for an EVM contract/token address
entity-resolve.iykykblog.workers.dev
Resolve a company name or alias to its canonical legal identity — legal name, LEI, SEC CIK and tickers, jurisdiction, and entity status — by…
familyofficeknowledgegraph.ai
The Family Office Knowledge Graph index of record for $0.01 USDC — every node's record list (LEI, legal name, aliases, register ids, field states,…
files.camelai.io
Upload a file and get a temporary signed URL. Send raw file body with Content-Type header. Returns a URL valid for 1 hour.
Domain Host Trust Record
Observe public DNS, TLS and baseline response headers through HTTPS HEAD / on port443; no full-path scan or global trust assessment.
Caller E2E - x402
Caller E2E - x402:
Convert currency
Convert an amount from one currency to another using reference rates (latest or a historical date). Amount defaults to 1.
gateway.grapevine.fyi
0.05 USDC on base
Locus x402 Services
Locus public pay-per-use API
Locus x402 Services
Locus public pay-per-use API
grove.g-datalabs.com
Check CSV data for missing values, duplicate rows, schema mismatches and invalid types. Returns a deterministic JSON quality report. Up to 1 MB and…
headlessoracle.com
Signed market-state receipt for one exchange. OPEN/CLOSED/HALTED/UNKNOWN - Ed25519 signed, 60s TTL.
health.memoryapi.org
WHO Global Health Observatory — life expectancy, obesity, alcohol, air pollution by country.
Agent Action Safety Quick Gate
AI agent action safety: one-cent deterministic preflight for every consequential agent command. Returns risk, matched rule ids, and an exact…
hk-cm-kg.ai
One paid call on hk-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…
Hyperliquid Funding Extremes
Full Hyperliquid funding extremes (carry-cost leaderboard)
home-health-screen.iykykblog.workers.dev
Home-health agency quality verdict by agency name, CMS Certification Number (CCN), or ZIP code. Returns the CMS Quality of Patient Care star rating,…
horizon-pulse.vercel.app
Horizon Pulse — real-time crypto market data + momentum signals (BTC/ETH/SOL) tuned for AI agents
HTTP Header Checker
Sends a request to a web address you provide and reports back everything the server said in response: the status code, all the response headers, how…
GEDX402 Image
Fast text-to-image with Flux 1 Schnell (@cf/black-forest-labs/flux-1-schnell). POST prompt and optional dimensions; returns base64 image output.…
French Accounting (PCG + VAT)
French accounting and bookkeeping: accounting entry for a purchase by a French firm (expense categorization, supplier invoice, chart of accounts…
x402.jev
Answer typed questions about a state. Demo only, after explicit user confirmation of /SKILL.md terms. No production or consequential real-world…
Jobs Search
Job search — find current openings by role, skill or company with location, salary, schedule, qualifications and direct application links.
joi-presign.joi-agent.workers.dev
Pre-sign risk check: decodes a transaction, typed data or sign request and flags risky approvals, permits, blind signing and drainer patterns. Run…
Verify a JWT
Verify a JSON Web Token's signature and claims against a shared secret (HS*) or a PEM public key (RS/ES/PS). Returns { valid, payload } on success…
Agent Kalender Hub
Für Zahlungsziele, Fristen und Liefertermine. Die Antwort nennt das Ergebnisdatum, die Zahl der Kalendertage und jeden übersprungenen Tag mit Grund.
402-preflight
x402-preflight: confirm your wallet can transact, and see your balance, in one certified call. Pay $0.01 USDC on Base, get a signed…
Kertivo Check: payment verify
Payment verification for x402: verify a USDC transaction on Base — did this payment really settle, and did it pay the right address the right…
Keyless
LLM chat completion with no API key or signup (Claude Sonnet class, anthropic/claude-sonnet-5.5). OpenAI-compatible: set your SDK base URL to…
know.fast
Send a link, know it: any URL — article, YouTube video, X post, podcast episode, paper, PDF, GitHub repo — becomes a durable, cited knowledge page…
kr-cm-kg.ai
One paid call on kr-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…
KYACheck
KYA / counterparty check for a wallet (and optional name): OFAC + wallet risk + signed verdict
kyp-model.ai
One paid call on kyp-model.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of…
LatAm Official FX
Official central-bank exchange rate for one Latin American currency against USD (BRL PTAX, ARS BCRA, COP TRM, PEN BCRP, MXN FIX), with source, date…
TokenLaunch
New token launch scanner — Base and EVM chains, real-time pool data
Global Legal Entities
Search global company legal names in GLEIF to find Legal Entity Identifiers (LEIs), jurisdictions and registration status. Up to ten results per…
Base Token Check by LIN Desk
Use when an agent needs a quick ERC-20 contract check on Base before trading or accepting a token: name/symbol/decimals/total supply, owner and…
Kertivo Logs
Filter a JSON/NDJSON event log by field/operator/time range; returns matching events. Use when an agent needs to pull matching rows (thresholds,…
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…
masterclaw.dev
OpenAI-compatible chat completions backed by DeepSeek (GET probe variant). Answers open-ended questions and returns reasoned analysis.
pkg-oracle
Checks whether an npm, PyPI, or crates.io package is safe to install: confirms it exists, flags malicious or typosquatted/slopsquatted names, checks…
Agent Memorial Wall
One public entry on the Agent Memorial Wall: an optional name and a message of up to 140 characters, recorded with the Base transaction that paid…
Wicked Memory
Semantic search over an agent's own persistent memories (wallet-scoped). Free with a valid x-api-key.
Testnet ETH Merchant
Buy Hoodi ETH with Base or Solana USDC at $0.025 per testnet ETH
mine-safety-screen.iykykblog.workers.dev
MSHA mine safety verdict by Mine ID, mine name, or operator name: inspections, violation counts (incl. significant & substantial), assessed…
StrategicMaterials
Critical-minerals supply-concentration & US import-reliance signal
Locus x402 Services
Locus public pay-per-use API
music.jamesbpollack.com
Search the James B. Pollack music catalog by mood, BPM, key, year, or similarity
nerfradar.com
Nerf Radar: a structured summary of one official game patch (World of Warcraft: Forever (beta), World of Warcraft (Retail), Counter-Strike 2, League…
nl-cm-kg.ai
One paid call on nl-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…
Contract Safety Checker
x402 v2 paid EVM token contract risk API on Base and BSC. For 0.01 USDC, returns EIP-1967 proxy detection, owner control and renouncement status,…
npm-downloads-range.hergertsynthora.com
Returns a per-day download time series for an npm package over a period from keyless api.npmjs.org — the raw signal for trend and growth-rate…
nrc-event-screen.iykykblog.workers.dev
Screen a facility or licensee against U.S. Nuclear Regulatory Commission (NRC) Event Notification reports: matching event notifications with event…
nz-charity-verify.iykykblog.workers.dev
Verify a New Zealand charity against the Charities Services Charities Register. Look up by charity registration number (CC…) or name; returns…
obagents.vercel.app
x402 OB Image Generator · Price $0.01 per generated image https://obagents.vercel.app/api/obigen/protected/igen GET Query Params // The primary text…
Open Graph Image Generator
Generate ready-to-use 1200x630 Open Graph / social preview images from text for content, marketing, and publishing agents. Provide a title plus…
open-research-agent.com
AI-generated standard research report (Open Research Agent)
OrionCMD Checks
OrionCMD Checks: Certificate status from CT logs + live HTTPS probe. Issuer, validity, days left, % of lifetime used, renewal cadence and a…
count-audio-elements
How many <audio> elements does the page have? Fetches the URL and counts audio tags (plus, where relevant, how many have alt/src/href/type…
pagecheck-api-production.up.railway.app
Audit supplied HTML for metadata, canonical URLs, indexability directives, headings, image alternatives, form labels, link names, social metadata…
cryptoanalysis-today-call
cryptoanalysis.info daily Bitcoin advisory call for the current UTC day, with confidence and bounded completed-session history.
Locus x402 Services
Locus public pay-per-use API
Generate password
Generate a secure random password (characters) or a wordlist passphrase.
Pique Signal
We catch Solana memecoins early: 7,400+ coins hit 5x, 3,400+ hit 10x and 246+ hit 100x from our first flag (all-time, Oct 14 2026:…
pixels.gateway.clawca.sh
Inspect a public HTTPS URL for redirects, metadata, content type, word count, and content hash.
pkgsafe.adrwent.fyi
Call before installing or updating an npm or PyPI dependency. Returns a verdict (ok, caution, avoid, unknown) plus evidence signals: install script…
ProofPulse
Check a public URL for meaningful changes and freshness.
PulseWatch Status API
PulseWatch Status API: Current outage status for a vendor (PulseWatch). Current status, active-incident summary, last-checked time and source URL…
qr-api-production-7adc.up.railway.app
Generate SVG or PNG QR codes for links, text and standard payloads. Includes a four-module quiet zone, selectable error correction and validated…
recallscout.scalpstream.com
RecallScout recall lookup (active US recalls across FDA, NHTSA and CPSC with normalised severity)
RugSense
Scored intelligence on freshly-launched Base tokens: safety + momentum → composite score and an AVOID/WATCH/HOT decision per launch. One call…
scotland-charity-verify.iykykblog.workers.dev
Verify a Scottish charity against the OSCR Scottish Charity Register. Look up by Scottish charity number (SC...) or name; returns registration…
Pay Guard
Pay Guard: pre-payment allow/warn/block check for x402. Send your planned purchase (domain, max_price_usd, asset/network) plus the 402 challenge…
sendcheck
SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST…
Google SERP Analysis for SEO
Analyze Google search results for a keyword. Returns organic results, featured snippet, People Also Ask, SERP features. Google SERP analysis for SEO…
sheets-api-production-636c.up.railway.app
Create styled XLSX workbooks with typed cells, multiple worksheets, filters, frozen headers, numeric formats and cached formula totals. Input…
Agent Screenshot Hub
One page load answers everything an agent needs to reason about a page: the DOM after JavaScript capped at 2 MB, the CDP accessibility tree…
SignalHarness x402 Services
Parses robots.txt groups and applies deterministic longest-match allow and disallow semantics.
SitePulse
Has this place been built on or cleared in the last 12 months? Sentinel-2 satellite change detection for any lat/lon: NDVI/NDBI deltas, change…
SkyeSkiff
Check that everyone in an agent session still qualifies, right now. Every member wallet is checked again against the channel's on-chain conditions…
source-claim-proof.mattskowronis.workers.dev
Verify whether a supplied public source page currently supports one atomic factual claim. Returns supported, contradicted, or insufficient-evidence…
sponsor-screen.iykykblog.workers.dev
Look up an employer's H-1B Labor Condition Application (LCA) filing history from public DOL OFLC disclosure data. Returns filing volume,…
SqueezeSignal
Short-squeeze setup signal for a stock (?ticker=<stock ticker>)
Locus x402 Services
Locus public pay-per-use API
StablePulse
Top stables ranked by mcap with peg deviation (now/24h/7d) + stability score + risk
stash.fluidrack.com
Reserve TTL object slot
store-production-8add.up.railway.app
Census of automated x402 monitors and index crawlers observed polling a Bazaar listing on Base mainnet: user-agent prefix, operator URL, stated…
Synapse Lounge
Synapse Lounge x402 access and service manifest
TableGrab
TableGrab: give a public URL and get clean, typed JSON tables (headers, row objects, inferred column types, caption/heading context; colspan/rowspan…
TenderDelta
Search explainably qualified EU solar and battery tenders from an explicitly dated TED snapshot
TradeAPEX related concepts
Related concepts for a word or short phrase, from a self-derived semantic model (no transformer). Measured class-separation AUC 0.846. Unknown words…
True Value Rankings
Custom-weight rerank of every cryptocurrency covered by True Value Rankings: the full TVR table recomputed with the caller's own weights for the 8…