◆ 24K LABS THE GOLD‑402 INDEX

01 APIs & Services 348

Endpoints that do a job and charge for it. The largest shelf, and the one where "it answered when we knocked" carries the most weight — an API that does not respond is not a product, it is a URL.

— a specification sheet —

348 of 731 curated services sit on this shelf. 146 carry a dated knock; most recent . 36 currently answer nothing. A knock is one HTTP request that got an answer — not a delivery test. Read a stamp as reachable and speaks the protocol, never as worth the money.

  • _done Suite of x402 micropayment-gated utility APIs for AI agents (web lookups, site analysis, data and more).
  • /deslop — Removes AI-writing tells (em dashes, hedging, throat-clearing) from a draft, returns cleaned text plus a ch…
  • 100pro Token Contract Risk Screen — Pre-trade risk screen for EVM (Base) and Solana token contracts: honeypot, clone/mimic and owner-privilege…
  • 24K Labs Chronographer Temporal context for AI agents: 15+ time systems (lunar, solar, market sessions, circadian, ISO/Julian) plu…
  • 402cron — Schedules signed HTTP deliveries to a registered endpoint on a cron schedule, paid per delivery in USDC on…
  • 402PIXEL AI-agent-only territory game on a shared 402-tile board.
  • 402post — Classified listings board for agents: `POST /v1/posts` answers 402 ($0.10 USDC on Base for a 30-day listing…
  • 402registry — Checks whether AI crawlers (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) actually see a website: `GET /…
  • 4yearcycle data catalog — Twelve pay-per-call data endpoints for agents covering EU tenders (TED) and grants (CORDIS), crypto derivat…
  • AEO Scanner (Convrgent) AI search visibility audit for any website.
  • afriref — Government reference data for African countries as JSON: central-bank policy rates, VAT, income and corpora…
  • Agent Council — Sends one question to three or four different LLMs that answer independently, then returns a single chaired…
  • Agent Embassy — Agents pay per call in USDC via x402 for verified web checks with signed Outcome Receipts, encrypted recove…
  • Agent Hub — 48 pay-per-call tools for agents behind one wallet: web search, page-to-Markdown, scraping and JSON extract…
  • Agent Ready Website agent-readability scanner.
  • Agent Research Tools — Cited research brief from Wikipedia, DuckDuckGo, Hacker News and Crossref ($0.01), web page to markdown ($0…
  • AgentBIT — 86 pay-per-call tools for agents, including page-metadata extraction, Base wallet profiles, Wikipedia groun…
  • AgentData API Real-time crypto market data.
  • AgentPay Real-world service booking via x402 + Stripe.
  • AgentPay Doc Tools — Extracts per-page text from PDF URLs, normalizes RSS, Atom and JSON feeds into JSON items, and lists a site…
  • AgentPay Domain & Network Lookup — DNS records, registry WHOIS via RDAP, IP network ownership with reverse DNS, and a one-call domain report c…
  • AgentPay Insurance Lead Analysis — Classifies an inbound insurance lead, extracts structured fields from it, and returns a lead summary in one…
  • AgentPay Summarize — Summarizes up to 20,000 characters of text into a 250-word summary returned as JSON.
  • AgentPay Token Safety — Reports rug-pull and honeypot risk signals and liquidity for a token contract address.
  • AgentPay Web Extract — Fetches any URL and returns the main content as markdown with title, Open Graph metadata, canonical URL and…
  • AgentRXI — 232 pay-per-call tools for agents behind one wallet: 22 OpenAI-compatible LLMs priced per token, web search…
  • AgentServices Paid data APIs for AI agents: crypto prices, technical indicators, DeFi yields, IP geolocation, and URL met…
  • agentsvc.io 20 utility tools for AI agents: `ip-lookup`, `dns-lookup`, `qr-code`, `exchange-rates`, `email-validate`, `…
  • Aigregator Structured data on 5,336+ AI tools via REST API and MCP server.
  • AIsa Leading x402 payment processor.
  • AISkills402 — Tested AI agent skill files (SKILL.md): `GET /v1/skills/{slug}/file` answers 402 ($0.01 to $0.10 USDC on Ba…
  • aiworker-data — DeFi yield pools and single-protocol snapshots from DefiLlama (refreshed every 5 minutes), plus clean-Markd…
  • AlphaClaw Autonomous alpha hunting on Polymarket and DeFi.
  • Animica Research — One call that searches the web, fetches the top pages and returns their readable text with every requested…
  • AnyBrowse Autonomous web browsing agent.
  • API Acre Website Metadata — Extracts title, canonical URL, headings, hreflang, icons, feeds, Open Graph, Twitter Cards, and JSON-LD typ…
  • Apify — Apify's marketplace of web-scraping and automation Actors, reached by buying prepaid tokens over x402 for $…
  • ApiToll Crypto — DeFi yields, protocol TVL, DEX volume and token prices, 11 routes at $0.001 USDC on Base and Solana.
  • apix402 Sixteen paid endpoints for agents, each answering against the source that decides rather than a summary of…
  • Appraxa IP Valuation — Patent valuations to the DIN 77100 standard in basic, standard and premium tiers, with a lookup by patent n…
  • Arch Tools 58 production API tools for AI agents.
  • AskClaude Pay-per-query Claude API.
  • Astro Agents — Deterministic Western and Vedic astrology computed from NASA/JPL DE440 with no LLM (natal charts, transits,…
  • AtlasUnited Storm and Hazard Data API — Pay-per-call x402 endpoints on Base for live weather and active NWS alerts, forecast risk grades, and hazar…
  • Ausca — Metered infrastructure services for agents: document OCR, document analysis, media transcription, leased br…
  • Automaton Oracle Sovereign crypto intelligence: real-time prices, global macro intelligence, pump.fun graduation radar, trad…
  • Averray Verify — Runs bounded verification profiles and returns signed, content-addressed receipts, with x402 USDC on Base c…
  • AVT x402 Data Services 16 pay-per-call data and validation APIs: field-verified AV/IT device-integration knowledge base (curated b…
  • AX1 Token Verdict — Send a Base token address and get an AI-written verdict with onchain metrics and a shareable card, $0.02 US…
  • Azimuth — Radio-frequency positioning network: estimates a location from cellular observations, with node registratio…
  • Basalt — 20 pay-per-call utility tools for AI agents: URL metadata extraction, domain availability via RDAP, email/M…
  • Base Token Risk Check — Reports an ERC-20 on Base for honeypot/tax/owner-privilege flags (GoPlus), verified source, proxy/mint/paus…
  • Base toolbox — Base Uniswap v3 swap preflight, leftover allowances, tx explain, and transfer check at $0.10 USDC on Base v…
  • Base tx-decision Submit-now-or-wait decision plus EIP-1559 fee sizing for Base mainnet transactions, computed live from RPC…
  • Base Wallet Profile API — Returns a Base wallet activity profile with native balance, transaction counts, token transfers, first/last…
  • BaseLens — Base token scam and honeypot check with simulated sell, plus page-to-markdown fetch, transaction explainer,…
  • bilbop Solana Mint Info — Returns on-chain supply, decimals and mint/freeze authorities for a Solana SPL mint for 0.01 USDC on Solana…
  • BitBooth — PageDelta renders a public web page into bounded Markdown and, on later calls, reports what changed against…
  • Bitrefill — Search and buy gift cards, eSIMs and mobile top-ups across 180+ countries, paying the invoice in USDC over…
  • Black Label Continuum Audit — Scores eight self-declared AI-agent continuity capabilities and returns a deterministic 0–100 score with ra…
  • BlinkCodes Storefront selling real-world digital goods to agents: gift card codes (Steam, Razer Gold, PSN, Apple), gam…
  • BlockLabs Catalog — Dropshipping storefront selling physical products to agents: 300,000+ item catalog, paid full-text search a…
  • Bloomfilter x402-powered domain registration API for AI agents.
  • BNM Data Shop Official public-data caches on 37 paid GET routes (FDA, USDA, USCG, and US/UK/EU/Canadian agency texts and…
  • botsmith — X (Twitter) lookups for agents: a post by id, an account by handle, search, a dossier and a watchlist.
  • Brian Booms x402 Store — 33 digital products (music licenses, podcast packs, sample packs, custom commissions, wallpapers) sold via…
  • BridgeNode OpenAI-compatible LLM inference bridge: 38 models (GLM, Kimi, MiniMax, DeepSeek, GPT-OSS), chat completions…
  • BTC Intel — Live Stacks/Bitcoin market intelligence for AI agents: STX/BTC/USD spot, STX-BTC ratio and sats-per-STX;
  • Calibrated Similarity Search API Stateless NMI + cosine fusion similarity search over pre-computed numeric vectors, with an entropy-calibrat…
  • CapGain safety and work artifacts EVM token risk and Base swap preflights from $0.01, plus machine-buyable invariant tests ($0.03), repositor…
  • CentRake Universal calculator with 3-layer self-correcting verification.
  • Checkpoint402 Company Events (SEC 8-K) — Returns the latest SEC 8-K filings market-wide or for one ticker, with item codes in plain English, high-im…
  • Checkpoint402 DeFi Yield Finder — Returns top DeFi pool yields from DefiLlama filtered by asset, chain, minimum TVL and risk tier, with the r…
  • Checkpoint402 New Token Safety Feed — Lists newly launched token pools on Base, Ethereum or BSC with a 0–100 safety score and red flags from GoPl…
  • Checkpoint402 Transaction Explainer — Explains a Base or Ethereum transaction in plain English with the decoded sender, function called, token an…
  • Circadian Web data extraction for agents, run as a disclosed autonomous AI-agent business: page-to-Markdown with meta…
  • Citable — SEO and AI-visibility data on 17 paid GET routes: keyword research, on-page audits, AI-citation checks acro…
  • City Table Clean — Cleans a Socrata or CKAN city open-data CSV by URL (trims whitespace, normalizes headers, ISO dates, plain…
  • Clarity — Base mainnet x402 gateway for external USDC payers: OpenAI-compatible chat ($0.001) and short research/verd…
  • Clear Fetch one public URL as markdown from the public HTML (Readability + Turndown).
  • Cloudflare Workers Edge payment verification at scale across 300+ data centers globally.
  • Coinbase Developer Platform Official CDP implementation processing hundreds of thousands of transactions weekly.
  • Coinnect Money transfer routing API.
  • Colombia TRM Official Superintendencia Financiera daily USD/COP TRM as prepaid x402 at $0.005 USDC on Base.
  • Compounder Market API — Scores a bounty or paid opportunity from a JSON description and returns a deterministic 0-100 score, a purs…
  • Compute State API — Returns the cheapest official-vendor compute SKU for one described job, inference tokens or on-demand GPU h…
  • CONNSKILL Growth Services Growth infrastructure for AI agents: SEO/SERP research (Google SERP reports, keyword volume/CPC, ranked key…
  • Content Intelligence API AI-powered web content extraction and analysis.
  • Contract Guard Pre-interaction EVM contract risk signals: EOA/contract/self-destructed status, EIP-7702 delegated-EOA dete…
  • corpusAI Cloud Pricing — Cloud instance, GPU and LLM token price data (on-demand and spot prices by zone, GPU term structure, capaci…
  • Council of AI — Independent AI-behaviour measurement packs and EU AI Act evidence over x402 on Base;
  • crosscheck — Reviews an AI agent's draft before its human sees it and returns pass or specific issues with fixes, recomp…
  • crosscheck accept — Checks work one agent hands another against the task it was given, before the buyer pays or releases escrow…
  • crosscheck skillcheck — Security review of an AI agent skill or MCP server's files before install, read and never run: code rules f…
  • CrossFin 15 paid Korean market data APIs (Kimchi Premium, KOSPI, Bithumb, Upbit, Coinone, FX, headlines, trading sig…
  • Crypto Sentiment API — Real-time crypto sentiment for any ticker, aggregating 8 crypto news outlets and the Fear & Greed Index int…
  • CryptoSignalBot x402-gated crypto volume anomaly scanner.
  • Crysha Price Oracle Aggregated crypto prices (multi-source BTC/others).
  • csno Provably-fair coinflip, dice, and European roulette for agents: `POST /api/csno/chips` answers 402 ($0.10 f…
  • Cult OS Developer Tools — PR triage, JSON, hashing and encoding utilities and signal feeds for agents, 15 routes at $0.001–$0.20 USDC…
  • CYBERA Compliance API Crypto compliance suite.
  • D-007 Document Classify and Rename Plan — Generates a dry-run classification, traversal-safe filename, folder proposal, and duplicate signals for one…
  • Data Quality Gate Deterministic post-scrape data cleaner: repairs how data was encoded — residual HTML, mojibake (`Café` → `…
  • DDG Agent-Payable Services Machine-readable security and commerce primitives for AI agents.
  • DeepBlue Trading API AI-powered crypto intelligence from an autonomous trading team running real money on Polymarket.
  • Deepnets — Solana token intelligence for traders and trading agents: token safety analysis, holder graphs, funding-net…
  • DeFi Intelligence API Unified DeFi security, bridging, analytics.
  • DELTA Witness — Public-web evidence capture, deterministic preflight verification, and guarded-action evidence endpoints, $…
  • DeskCrew Agent-native helpdesk.
  • DevDrops 22 pay-per-query data APIs: prediction markets (Polymarket + Manifold), property intelligence, sports odds,…
  • DNS Doctor — Email-authentication and DNS diagnostics for agents: SPF, DMARC, DKIM, MX, blacklists, domain/SSL expiry an…
  • Dokimo Verify API Pay-per-call x402 endpoint that independently verifies a Merkle evidence proof to its committed root and re…
  • Domain Intelligence API 8-endpoint domain analysis: WHOIS, multi-resolver DNS, SSL/TLS grading, Wappalyzer tech stack detection, se…
  • dotrockets Agent Tools — A mixed toolbox: a live geophysics snapshot (KP index, Schumann resonance, solar wind), an AI-visibility sc…
  • DreamWidget — Website widgets (logo showcases, a YouTube/Vimeo/Twitch/TikTok video wall) for an agent's client: POST /api…
  • DrinkedIn data feeds — Records of licensed bars and venues from public alcohol-licensing registers, cocktail recipes, and venue-ec…
  • dTelecom STT Real-time speech-to-text API.
  • ECB FX Reference Converts amounts across ECB-supported currencies from the European Central Bank's daily euro reference obse…
  • Einstein AI — Blockchain analytics built on Bitquery data, each query offered raw or with AI-written analysis: newly depl…
  • ERC-8004 Agent Liveness Checks whether an agent registered in the real ERC-8004 Identity Registry (Base Sepolia testnet) is actuall…
  • eu-validate — Validates IBAN (mod-97 offline), EU VAT number (VIES), and company domain (DNS/MX) in one x402 call.
  • EVM Selector, URL Status, Crypto Price and DNS Lookup — Four small agent utilities on the same x402 host: decode an EVM 4-byte function selector or calldata via So…
  • Exa — Exa's web search and page-contents endpoints sold per call over x402, $0.001–$0.007 USDC on Base, Solana an…
  • Excelexi — Technical-indicator and market-analysis API for trading agents: 73 indicators and 24 derived signals across…
  • exhibit402 — Dual-cloud evidence capture: two independently hosted, pinned-image browsers (Google Cloud us-west2, Fly.io…
  • Fabler Labs x402 Storefront Security and utility APIs for AI agents on Base, USDC per call, no signup: secret scan ($0.005), agent-conf…
  • Feeless402 — Reference pay-per-call endpoint settling in Nano (XNO): GET /premium answers a v2 402 at 0.0001 XNO per cal…
  • Fetchgate Agent-facing storefront + web-reader API on Cloudflare Workers.
  • fetchx402 Network utilities for agents: DNS, SSL, WHOIS (RDAP), HTTP headers, redirect tracing, host-intel and uptime…
  • Find Domain Domain research API.
  • Fly Labs Agentic Market YouTube data APIs for AI agents.
  • fly.ai — Robinhood Chain trade costs (`GET /cost/{ticker}`, $0.02), token checks (`GET /token/{address}`, $0.03), Ti…
  • Forge Attestation Signed third-party evidence records for x402 transactions, where every claim is labelled `witnessed` or `as…
  • Forge Launch Signals Live pump.fun launch-signal feed: up to 100 newest launches with normalized screening verdicts (class, reas…
  • FractalAI x402 Proofs — Seven pay-per-call endpoints on Base (x402 v2, USDC via EIP-3009 gasless settlement) signing with ML-DSA-65…
  • Gardenpatch Growth Coaches — Seven growth coaches (strategy, sales, marketing, operations, retention, technology, people) answering a mo…
  • Gate402 — Pay-per-call tools for agents: a public URL rendered to clean Markdown, Base on-chain and DEX data, token r…
  • Gateway Website Quick Check — Returns an asynchronous one-page website metadata report for $0.05 USDC on Base via x402, with private stat…
  • GBLIN Protocol Treasury and risk data for a NAV-backed basket token on Base (cbBTC/WETH/USDC) with an automated on-chain c…
  • GenTech x402 Gateway 15 pay-per-call endpoints for crypto intelligence, wallet analysis, token risk scoring, NFT search, game/mo…
  • Genuine Good Grants — Sourced U.S.
  • geo-gateway Pay-per-call Mapbox geospatial proxy.
  • GigSoul AI Research Agent 23-endpoint AI research API: SEC filings, earnings calls, competitor analysis, market research, document in…
  • GLEE Acceptance Verifier — Deterministic git unified diff acceptance verifier: checks delivered code patches against caller-declared p…
  • glim.sh — Live social-profile data for agents (profiles, followers, user search and follow checks), 24 routes at $0.0…
  • GlobalAPI — US macro data (CPI, unemployment, GDP, Fed rate, yields) with AI-written commentary, plus OFAC wallet scree…
  • GlobalRules — Per-country practical facts for agents: VAT/GST rate, public holidays, visa requirements, tipping customs,…
  • Gondola Pay-per-request LLM inference over x402 (OpenAI-compatible chat, images, and Anthropic messages);
  • Gotobi Calendar API Japanese FX gotobi date intelligence for trading agents.
  • GPT55 Model Gateway OpenAI-compatible GPT-5.6 Luna Standard chat completions via x402 USDC on Base for $0.00293 per POST request.
  • GPU Rental Price Feed — Current on-demand GPU rental prices (min and median USD per GPU-hour by GPU model) from Vast.ai's public ma…
  • GPU-Bridge 30-service GPU inference: LLM, image generation, embeddings, STT, TTS, PDF processing in one API.
  • gravee — 23 pay-per-call business lead generation and market intelligence endpoints: scored leads by vertical and lo…
  • Grey Ridge Signals — x402 Data & Security APIs 17 agent-native pay-per-call endpoints: blockchain queries (balance, gas, code, receipts, token balances),…
  • grist.tools — Deterministic HTTP micro-utilities for AI agents: page cleaning and metadata, document conversion (PDF, DOC…
  • Groundcheck Claim grounding and delivery attestation for AI agents: machine-verified verdicts (supported/refuted/unveri…
  • Headless Oracle — Signed market-state receipts for exchanges, one exchange or several per call, each Ed25519-signed with a 60…
  • Hermes Commerce — Public-site checks sold as 27 POST jobs: Impressum, DSGVO, BFSG, cookie, Preisangaben and Widerruf signals…
  • Hodler DeFi Intelligence Stablecoin monitoring, redeem arbitrage, cross-chain pair discovery across 10 EVM chains.
  • Horizon Pulse — Returns crypto market data (BTC/ETH/SOL pulse, RSI/MACD/Bollinger signals, DefiLlama yields, Base+Ethereum…
  • HSH Data-on-Demand — Company and contact data for B2B research: a live profile of a company by name or domain, and named decisio…
  • HydraTrader x402 Catalog — Three pay-per-call Base USDC helpers via x402 (no API key): `POST /v1/cheap-errand` ($0.01) summarize/rewri…
  • HyperNatt Terminal — Liquidation-cluster map and a Li.Fi cross-chain swap quote, $0.001 USDC per call on Base and Solana.
  • Hyrule Cloud — IPv6-native VMs with root SSH from $0.20/day, network diagnostics (DNS, BGP, IP, RDAP/WHOIS, deep TLS, MX,…
  • IBANforge Pre-payout IBAN screening: validation + issuing-bank identification against 6 national bank registers (CH/L…
  • Instant Expert — Pay per question for a written or voice answer from a real professional the agent names (name and company,…
  • Intel API AI-synthesized token due diligence.
  • Isocast Per-signal Polymarket weather-market data across 37 cities.
  • Israel Company Verify — Verifies Israeli companies against structured public-registry data and returns evidence for $0.05 USDC per…
  • Israel Invoice Payment Gate — Pre-payment gate for Israeli tax invoices and accounts-payable agents.
  • JMT x402 Agent Tools 25 endpoints: web search, AI analysis, crypto/stock data, SEC filings, company intel, news, sentiment, macr…
  • jurat — Evidence tools for agents: fetches a public URL, archives the bytes and returns a signed attestation, with…
  • Kael Ecosystem Pulse — Paid 24h Solana ecosystem digest for agents via x402 Exact SVM USDC on Solana mainnet (PayAI facilitator):…
  • Kalshi BTC Hourly Signal — Current model signal for Kalshi's BTC hourly above/below markets (KXBTCD) from a volatility model that trad…
  • Kalshi ETH Hourly Signal — Current model signal for Kalshi's ETH hourly above/below markets (KXETHD) from the same volatility model as…
  • Kalshi SOL Hourly Signal — Current model signal for Kalshi's SOL hourly above/below markets (KXSOLD) from the same volatility model as…
  • Kalshi–PredictIt Arb — Matches Kalshi political markets to PredictIt contracts and returns both arbitrage directions priced after…
  • kepler-ops-tools — Nine pay-per-call agent utility endpoints: hashing/HMAC (six algorithms), base64/hex/url encoding, JWT deco…
  • Kerdos Market Intelligence AI market intelligence for agents and traders.
  • Know Your Human (Convrgent) Personality intelligence API.
  • KnowMint Open-source knowledge marketplace.
  • KR Crypto Intelligence Korean crypto market data.
  • Kraken Crypto Signals — Crypto market-state calls for a trading pair (BUY, SELL or HOLD with a confidence score), a market scan, in…
  • Kronos x402 API — Crypto derivatives and market data for trading bots across 17 assets: funding, open interest, basis, liquid…
  • Laso Finance — Prepaid US cards, reloadable card balances and catalog gift cards bought with USDC over x402 on Base or Sol…
  • Liam Tools — JSON utilities for agents (numeric summaries, text metrics, normalization, budget checks).
  • Liam Tools Merchant Connect — Generates an 11-file business-specific x402 digital-service integration kit with catalog, OpenAPI, XRP gate…
  • LitWit — The Literary Witness — Literary notary API: submit a SHA-256 hash of a written work and receive a tamper-evident hash-chained rece…
  • Live Entity Verification API Cross-signal Bayesian corroboration of entity existence: fuses WHOIS, Certificate Transparency, Wayback Mac…
  • LLM Token Price Feed — Current USD per 1M input/output token prices for ~300 LLMs from OpenRouter's public model list (refreshed e…
  • LoneStarOracle 43 pay-per-call data APIs: token and wallet risk scoring, smart-contract security audits, whale and bundle…
  • Loyal Spark — Onchain loyalty platform on Base where businesses run branded rewards and agents manage offers through 31 p…
  • M0 URL Extraction Fetch a public URL, get back clean machine-consumable text (HTML noise stripped, SSRF-guarded).
  • Macro Pulse Pay-per-call macroeconomic indicator API sourced from the World Bank (GDP growth, inflation, unemployment t…
  • MadeOnSol — Solana KOL trade feeds, deployer reputation, token risk/buyer-quality scoring, and wallet PnL for AI agents…
  • Mailcheck API Email validation: syntax, MX records, disposable domain detection, free provider check, role-based address…
  • Market Intelligence API — 76 pay-per-call x402 routes for AI agents: trading decisions with a public track record, on-chain order flo…
  • Mart402 Web and PDF extraction for AI agents: URL-to-Markdown extraction, PDF parsing with dual-engine OCR consensu…
  • MCPFax Public-Data Utility — 31 keyless public-data endpoints for AI agents: geocoding, weather, air quality, VIN decode, FX, stock quot…
  • Melchior Video Context — Captions from a public YouTube video as transcript text with timestamped segments, phrase search inside a v…
  • Melvea — A structured catalog of honey varieties (color grade, intensity, flavor, texture, uses) with research citat…
  • Mercury402 Pay-per-call U.S.
  • Micro Data API Factory — Japan back-office lookups for agents: payroll deductions by salary, social-insurance grades, consumption ta…
  • modelprices.xyz Normalized LLM market data: per-token prices, context windows, and capability limits for 2,000+ models acro…
  • Moltalyzer Four AI intelligence feeds: hourly Moltbook community digests, daily GitHub trending repos, Polymarket pred…
  • MoltGuard Agent trust scoring, Sybil detection, Polymarket integrity, Ed25519 Verifiable Credentials.
  • MoonMaker API AI-native crypto intelligence.
  • MOSS Agent AI-powered coding services: code review ($0.005), translation ($0.003), code explanation ($0.003).
  • Mossgate Trust API Onchain risk checks for Base ERC-20 tokens and wallets: token verdict returns ok/caution/danger with liquid…
  • MusedIn — Job network for agents: post a paid job with a budget, verified agent workers apply and deliver, and the bu…
  • Nano CSV service — Deduplicates up to 5,000 CSV records by exact composite string keys, preserving the first row, for 0.1 XNO…
  • Nansen — Nansen's onchain analytics sold per call, including prediction-market screeners and Token God Mode PnL lead…
  • New x402 Listings Feed Feed of x402/L402 services newly listed on 402index.io within a caller-specified recency window (default 24…
  • NIMATRON COT — CFTC Commitment of Traders positioning: a one-call summary, a single market broken down by trader category,…
  • Node Scorecard API Scored directory of Sentinel dVPN network nodes: composite score per node, sorted best-first, active nodes…
  • NodeFlare Pay-per-request JSON-RPC on 23 EVM chains (including Robinhood Chain, Plasma, Ink and Zircuit) served from…
  • Oblique Markets — 67 paid routes for agents, among them award-flight search, legal entity (LEI) lookup, BNB payment preflight…
  • Obol AI code generation via x402.
  • Obol Base Network Status — Base chain-head and RPC-agreement snapshot, cross-checked across two independent providers.
  • On-Chain Activity Index 0-100 quantitative DeFi Protocol Activity Index computed from real public DefiLlama data (TVL trend, fee/vo…
  • Onchain Safety (wick.pics) — Token-safety verdicts across several chains: contract risk, liquidity and honeypot checks, a fresh-pool rug…
  • OneSource — Ethereum chain data over live RPC for agents (token and wallet balances, block height, contract introspecti…
  • Open Rails Data Agent — Seven pay-per-call x402 data endpoints on Celo mainnet for blocks, gas prices, wallet and token balances, t…
  • openzoo — OpenAI-compatible chat completions paid per request via x402 on Solana and Base, with no account or API key.
  • Oromi Agent Services — UK public-record lookups: Companies House search, company profiles and name checks, and Land Registry price…
  • Otto AI — x402 router with 76 paid routes, from SEC 13D/13G stake filings to fal.ai image and video generation, price…
  • OyaPicks Cross-venue prediction market data for AI agents: 11 endpoints covering keyword market search, single-marke…
  • PageWire — Pay-per-call web reading for agents: page to clean Markdown with links ($0.01), page metadata with OpenGrap…
  • panevin-x402-api Web content extraction and AI processing.
  • PayAPI Market First marketplace for x402-powered APIs.
  • PayPerByte Twelve pay-per-call USDC data feeds and oracles on Base mainnet: weather, earthquakes, CCTP v2 attestation-…
  • Penny Press — Original essays on freedom, economics and philosophy;
  • PLEXUS Intelligence API — 163 pay-per-call x402 endpoints from a single provider: US federal regulatory data (EPA, OSHA, FEC, SEC ful…
  • Pocket Network Agentic Portal — 114 pay-per-call routes served over Pocket Network, including read-only JSON-RPC such as OP Mainnet, web se…
  • Polybot Arb Intelligence Real-time cross-platform prediction market arb data (Polymarket + Kalshi + Myriad).
  • Polymarket Liquidity API Real-time Polymarket liquidity data.
  • Polymarket Scan API Automated Polymarket scanner detecting liquidity anomalies.
  • Pool Slippage — Sells a constant-product price-impact quote for a Uniswap V2 pool, computed from that pool's live reserves.
  • PortsideLabs Places API Google Places API v1 proxy.
  • PreReason Financial context API.
  • PricePlain — Posted US hospital prices from CMS price-transparency machine-readable files, cleaned (Twin Cities, MN firs…
  • Public Tenders ES/EU Normalized search over public-sector tenders published in TED (EU official procurement notices), covering S…
  • PulseNetwork Federated catalog of 950+ pay-per-call intelligence endpoints across 76 origins: token safety (8 EVM chains…
  • PureSignal402 — Prediction-market signals from Kalshi across crypto, macro, politics, weather, sports and tech: markets whe…
  • QRCode.Pub Agent Tools — Three pay-per-call GET endpoints on Cloudflare Workers: QR code image as PNG or SVG for any text or link ($…
  • QuantOracle — Deterministic quant finance calculators for agents: options, risk, portfolio, Monte Carlo, statistics, cryp…
  • RailAudit — Sells a liveness audit of an x402 payment rail: sends a real settlement probe and reports whether it settle…
  • Recompete Radar — Finds a recipient's US federal contract awards whose period of performance ends within a given window, sour…
  • Regression Incoming — Model-driven 2026 NFL preseason fantasy football rankings and draft boards.
  • RelayShield — Threat intelligence API with 32 pay-per-call x402 endpoints: phishing and malware URL scans, data-breach lo…
  • RGX — Snap Router: task-to-tool selection over the merged x402 Bazaar and MCP Registry catalog (16k+ entries), on…
  • Rubric Protocol — Post-quantum-signed (ML-DSA-65) AI decision attestations anchored to Hedera, plus signed agent spend statem…
  • Rue Render API Renders a URL or raw HTML to PDF, PNG, or JPEG via headless Chromium, SSRF-guarded.
  • RugGuard — Pre-trade rug check for a token on Base or Solana: a 0 to 100 score, a verdict and structured flags, with a…
  • Run402 — Infrastructure for agents (Postgres databases, static hosting, serverless functions, image generation), unl…
  • SAVER Verifier — Source-backed claim verification API for autonomous AI agents using x402 v2 with USDC on Base Mainnet and r…
  • Saylor Watchdog Solana token intelligence: price/liquidity spread across two independent sources, security flags (mint/free…
  • SchemaLock — Structured JSON extraction from invoices, receipts, contracts, resumes, or raw text/HTML via a caller-suppl…
  • Scout MCP Multi-source search across code, academic, social, community platforms.
  • scrape402 — Utility calls for agents: a web page as clean JSON or Markdown, PDF to text, structured extraction, weather…
  • Second Opinion — Returns a structured critique of a claim, plan or draft, for an agent that wants its work checked.
  • Sentinel x402-gated trust verification for autonomous agents.
  • ShieldAPI Security intelligence for AI agents.
  • SibFly — Measured ground motion (subsidence or uplift, in mm per year) for a US address, from Sentinel-1 InSAR.
  • SIBYL Crypto intelligence agent on Base.
  • SignalFuse Trading intelligence + x402 API gateway.
  • SignalHarness.ai — Publishes 330 production x402 API services for AI agents covering web and data processing, validation, AI u…
  • Sirenic — French and European company data from official registries: company search and profiles by SIREN, establishm…
  • Skill Audit Malicious-pattern detection for AI agent skills, plugins and prompts.
  • SkillMint 51 AI skills across 7 categories (dev tools, creative design, research, writing, docs).
  • Smart Event Scraper Aggregates events from Eventbrite, Meetup, AllEvents, District, EventsEye, and ConferenceAlerts into one st…
  • Softbot Email Check — Checks email address and domain deliverability signals without mailbox probing, $0.002 USDC per call on Bas…
  • Softbot Reader — Converts a public web page URL to clean markdown, $0.003 USDC per call on Base or Solana via x402.
  • Softbot Token Check — Returns a safe/caution/avoid verdict with reasons for a Solana token mint, $0.01 USDC per call on Base or S…
  • Solana Token Risk Check — Reports a Solana SPL or Token-2022 mint's mint and freeze authority, Metaplex metadata mutability, top-10 h…
  • Solana Wallet Research — Returns bounded finalized public-data reports for Solana wallet addresses for $0.01 USDC per call on Solana…
  • SolSignal API Solana token safety scanner.
  • SolSigs 20 pay-per-call Solana blockchain intelligence APIs: DEX prices, arbitrage scanner, wallet intelligence, to…
  • Sourcey Startup Credits Review — Human review of one startup-program submission against Sourcey's public evidence and Catalog admission rules;
  • Spraay Gateway — A broad pay-per-call gateway: OpenAI-compatible chat completions across many models, batch payments, swaps,…
  • StableEnrich — Google Maps, Places, Solar and Aerial View data served per call, 15 routes from $0.002 to $0.28 USDC on Bas…
  • StableUpload — Buy an upload slot for a file or a zipped static site and get an upload URL back, $0.005 USDC on Base or So…
  • Stelar Digital Live crypto grid-trading telemetry (real P&L, not simulated), grid-parameter recommendations, market-regime…
  • Stockfilm 217,000+ authentic vintage 8mm home movie clips (1930s-1980s) restored in 4K.
  • Strale Trust layer for AI agents with 250+ independently tested business data and compliance capabilities: IBAN va…
  • SwarmIO Cloud — Six pay-per-call research primitives over x402 (USDC on Base, no signup — the paying wallet is the account)…
  • Tanod — Pay-per-call API and MCP server (https://tanod.dev/mcp) for document, PDF, web, on-chain and security tools…
  • TaskMarket Data API — Read-only TaskMarket bounty-market data for AI agents: list open tasks (rewards, deadlines, submission dema…
  • Telemost — Telegram data for agents: recent messages from a public channel or group, keyword search across public chan…
  • Textus — Structured literary content for AI agents, including complete selected text units, metadata, characters, sc…
  • The Bot Wire 57 primary-source data wires for AI agents: SEC EDGAR, Federal Register, federal court opinions, congressio…
  • The Musebook Times Wire — Structured events wire as JSON: timestamped, receipt-backed history of the musebook town (editions, token l…
  • The Stall — A large catalog of data calls behind one host, such as SEC ownership filings, address intelligence and secu…
  • Tick Aggregator API Multi-source aggregated FX Best Bid/Ask from 3 institutional liquidity providers.
  • TinyOps Automation Integration Preflight Inspects a public webpage for automation readiness: integration links, forms, robots policy, security heade…
  • TokenGuard ERC-20 rug/safety scanner over public RPC on 6 chains (Base, Ethereum, Arbitrum, Optimism, Polygon, BSC): i…
  • TokenSafe — Sells a safety verdict for any Base ERC-20 token address: honeypot and non-transferable checks plus liquidi…
  • Tollbooth 56 financial, tax, and legal calculators for AI agents (income tax, self-employment/estimated tax, capital…
  • Tollex — Robinhood Chain mainnet data for agents (blocks, transactions, logs, balances, USDG and stock tokens;
  • TrollBridge — 101 pay-per-call intel lanes for AI agents on Base and Solana ($0.005–$30, most at $0.02–$0.10, USDC via x4…
  • true402 — Pay-per-call agent tools: OpenAI-compatible LLM inference across providers, SEO audits, web extraction, lin…
  • Truth Bear (GAUGE) — 180+ official-source data signals for AI agents: US river/flood and streamflow (USGS/NOAA), air quality (EP…
  • tx402.ai Agent-native LLM inference gateway.
  • url2md — PDFs and x402-tolled pages, returned as clean Markdown.
  • US City Open-Data Compliance Network Multi-jurisdiction property compliance for AI agents ($0.01 USDC on Base): catalog https://x402-mcp.onrende…
  • UTA Trust API — Agent trust verification as a paid x402 resource: validates one Agent Trust Card (ATC/1.0) with real Ed2551…
  • Vega Article Summarizer — Summarize articles and URLs into key points.
  • Vega PDF Extractor — Extract text from PDF files.
  • Vega URL Extractor — Extract clean text from any web page URL.
  • Vend API Merchant — Pay-per-call web intelligence settled in Nano (XNO), the feeless rail: URL-to-Markdown extraction, link che…
  • Venice AI Official Venice AI client for x402 micropayments.
  • Venture NL Open-Data Dutch open-government data: RDW vehicle registry, BAG addresses/buildings, postcode/geocoding, OV transit d…
  • Venture Reader — Extracts one public web page to clean Markdown for LLM pipelines using Mozilla Readability and Turndown wit…
  • Verdoc — Deterministic AGENTS.md generator for public GitHub repositories: build and test commands quoted from the r…
  • Vérif Entreprise FR — Verifies a French company by SIREN from official open data (Annuaire des Entreprises, BODACC, ADEME) and re…
  • VerifyPulse — Real-time RFC 5322 email verification, live DNS MX lookup, zero-send SMTP handshake ($0.01 USDC on Base via…
  • Veriton HTML→JSON — Metered HTML to structured JSON for agents (title/meta/links/headings/images);
  • Vibe Springs — Weather and environment data (forecast, air quality, marine, solar) alongside finance and blockchain calls.
  • Video Download AI — Downloads authorized public media URLs as MP4 video or MP3 audio with duration-based pricing from $0.0005 p…
  • ViewportWitness — Checks public websites before deployment across phone portrait, phone landscape, and desktop with screensho…
  • Vindex Vehicle-data API: VIN decode with factory warranty terms, recalls, known-issues/reliability, and US & Canad…
  • Viraill Generative Engine Optimization (GEO) and Agentic Commerce Readiness APIs for AI agents and SaaS: `POST /v1/…
  • Visibility AI Audit API AI-visibility and AEO audit for websites: agent-readiness scoring (llms.txt, schema, bot access, FAQ), gene…
  • Visual API Screenshot and PDF capture API.
  • Weather API Global weather data for AI agents.
  • Web Page to Clean Markdown — Fetches a public URL, strips nav/ads/scripts with Mozilla Readability, and returns clean Markdown plus titl…
  • WebberSites x402 Data API 41 pay-per-call endpoints for AI agents: web scraping, document extraction, whole-site SEO audits, brand-ki…
  • webcap — Web capture API with seven pay-per-call routes: page screenshots, structured content extraction, SEO audits…
  • WebIntel — Web lookups for agents: a page as clean Markdown, page metadata, sitemap, tech stack, DNS and domain enrich…
  • WebSocket Session Manager API Stateful WebSocket session registry that proxies a connection to a target URL and scores each inbound frame…
  • x402 AI API — zeroreader 29 Cloudflare Workers AI models (LLM, Embeddings, Image Generation, Audio, Translation) via x402.
  • x402 API Network — Small utility calls for agents: DNS and WHOIS lookups, IP info, QR codes, URL metadata and HTML to Markdown…
  • x402 Atlas Web Search — Web search, bulk search, deep research and page-to-markdown reading for agents, $0.01–$0.108 USDC per call…
  • x402 Crypto Research API — Generates current, source-linked cryptocurrency ecosystem research reports for 0.01 USDC per POST request o…
  • x402 Entity-ID Resolver Resolves a company or crypto name or ticker into ranked entities with verified canonical IDs across registr…
  • x402 Ping / UUID / Time — Cheap x402 test utilities: ping returns pong+server time, uuid returns random UUID v4 values (`n=1..100`),…
  • x402 Pulse — Live BTC/ETH/SOL prices and the Crypto Fear & Greed Index in a single GET call for $0.002 USDC on Base.
  • x402 Receipt Verifier Audits NEXUS's own x402 payment logs against its own delivery logs and issues a signed HMAC receipt proving…
  • x402-api Pay-per-call DeFi & crypto data.
  • x402-ping — Cheap Base USDC exact-x402 health/smoke ping: unpaid GET /premium returns HTTP 402 for 0.05 USDC on Base (e…
  • x402-seller Token rug/honeypot scoring combining GoPlus static analysis with live Honeypot.is sell simulation, liquidit…
  • x402engine 74 pay-per-call API tools: 44 LLMs, image/video generation, crypto data, web search, code execution, TTS, t…
  • x402risk — Base token scam/safety check, pre-trade sellability/honeypot/tax simulation, pay-to address screen, and an…
  • Xquik Real-time X (Twitter) data API.
  • zaref — South African reference data as cited JSON: fuel prices, repo and prime rates, CPI, tax tables, VAT, tolls,…
  • ZARONIA Verify — Coupon verification for South African floating-rate notes and money-market instruments, plus index lookups.
  • Zugabot Code Agent AI developer services via x402: code review ($0.25), bug fix ($0.25), security audit ($0.50), architecture…
  • Zugabot Image Generation Text-to-image generation via x402: FLUX Schnell ($0.15) or FLUX 2 Pro ($0.50), returns image URL plus dimen…