◆ 24K LABS THE GOLD‑402 INDEX

01 APIs & Services 156

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 —

156 of 505 curated services sit on this shelf. 146 carry a dated knock; most recent . 2 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).
  • 24K Labs Chronographer Temporal context for AI agents: 15+ time systems (lunar, solar, market sessions, circadian, ISO/Julian) plu…
  • 402PIXEL AI-agent-only territory game on a shared 402-tile board.
  • AEO Scanner (Convrgent) AI search visibility audit for any website.
  • Agent Ready Website agent-readability scanner.
  • AgentData API Real-time crypto market data.
  • AgentPay Real-world service booking via x402 + Stripe.
  • 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.
  • 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.
  • apix402 Sixteen paid endpoints for agents, each answering against the source that decides rather than a summary of…
  • Arch Tools 58 production API tools for AI agents.
  • AskClaude Pay-per-query Claude API.
  • Automaton Oracle Sovereign crypto intelligence: real-time prices, global macro intelligence, pump.fun graduation radar, trad…
  • AVT x402 Data Services 16 pay-per-call data and validation APIs: field-verified AV/IT device-integration knowledge base (curated b…
  • Base tx-decision Submit-now-or-wait decision plus EIP-1559 fee sizing for Base mainnet transactions, computed live from RPC…
  • 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…
  • BridgeNode OpenAI-compatible LLM inference bridge: 38 models (GLM, Kimi, MiniMax, DeepSeek, GPT-OSS), chat completions…
  • 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.
  • 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…
  • 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.
  • 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…
  • CrossFin 15 paid Korean market data APIs (Kimchi Premium, KOSPI, Bithumb, Upbit, Coinone, FX, headlines, trading sig…
  • 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…
  • CYBERA Compliance API Crypto compliance suite.
  • 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.
  • DeFi Intelligence API Unified DeFi security, bridging, analytics.
  • DeskCrew Agent-native helpdesk.
  • DevDrops 22 pay-per-query data APIs: prediction markets (Polymarket + Manifold), property intelligence, sports odds,…
  • 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…
  • 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…
  • ERC-8004 Agent Liveness Checks whether an agent registered in the real ERC-8004 Identity Registry (Base Sepolia testnet) is actuall…
  • 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.
  • 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…
  • 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…
  • 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…
  • 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-Bridge 30-service GPU inference: LLM, image generation, embeddings, STT, TTS, PDF processing in one API.
  • Grey Ridge Signals — x402 Data & Security APIs 17 agent-native pay-per-call endpoints: blockchain queries (balance, gas, code, receipts, token balances),…
  • Groundcheck Claim grounding and delivery attestation for AI agents: machine-verified verdicts (supported/refuted/unveri…
  • Hodler DeFi Intelligence Stablecoin monitoring, redeem arbitrage, cross-chain pair discovery across 10 EVM chains.
  • IBANforge Pre-payout IBAN screening: validation + issuing-bank identification against 6 national bank registers (CH/L…
  • 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…
  • JMT x402 Agent Tools 25 endpoints: web search, AI analysis, crypto/stock data, SEC filings, company intel, news, sentiment, macr…
  • 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.
  • Live Entity Verification API Cross-signal Bayesian corroboration of entity existence: fuses WHOIS, Certificate Transparency, Wayback Mac…
  • LoneStarOracle 43 pay-per-call data APIs: token and wallet risk scoring, smart-contract security audits, whale and bundle…
  • 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…
  • Mailcheck API Email validation: syntax, MX records, disposable domain detection, free provider check, role-based address…
  • 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…
  • Mercury402 Pay-per-call U.S.
  • 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…
  • New x402 Listings Feed Feed of x402/L402 services newly listed on 402index.io within a caller-specified recency window (default 24…
  • 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…
  • Obol AI code generation via x402.
  • On-Chain Activity Index 0-100 quantitative DeFi Protocol Activity Index computed from real public DefiLlama data (TVL trend, fee/vo…
  • OyaPicks Cross-venue prediction market data for AI agents: 11 endpoints covering keyword market search, single-marke…
  • panevin-x402-api Web content extraction and AI processing.
  • PayAPI Market First marketplace for x402-powered APIs.
  • PayPerByte Eleven pay-per-call USDC data feeds and oracles on Base mainnet: weather, earthquakes, CCTP v2 attestation-…
  • 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.
  • PortsideLabs Places API Google Places API v1 proxy.
  • PreReason Financial context API.
  • 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…
  • Rue Render API Renders a URL or raw HTML to PDF, PNG, or JPEG via headless Chromium, SSRF-guarded.
  • Saylor Watchdog Solana token intelligence: price/liquidity spread across two independent sources, security flags (mint/free…
  • Scout MCP Multi-source search across code, academic, social, community platforms.
  • Sentinel x402-gated trust verification for autonomous agents.
  • ShieldAPI Security intelligence for AI agents.
  • SIBYL Crypto intelligence agent on Base.
  • SignalFuse Trading intelligence + x402 API gateway.
  • 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…
  • 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;
  • 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…
  • TaskMarket Data API — Read-only TaskMarket bounty-market data for AI agents: list open tasks (rewards, deadlines, submission dema…
  • The Bot Wire 57 primary-source data wires for AI agents: SEC EDGAR, Federal Register, federal court opinions, congressio…
  • 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…
  • Tollbooth 56 financial, tax, and legal calculators for AI agents (income tax, self-employment/estimated tax, capital…
  • tx402.ai Agent-native LLM inference gateway.
  • US City Open-Data Compliance Network Multi-jurisdiction property compliance for AI agents ($0.01 USDC on Base): catalog https://x402-mcp.onrende…
  • 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…
  • Verdoc — Deterministic AGENTS.md generator for public GitHub repositories: build and test commands quoted from the r…
  • 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.
  • WebberSites x402 Data API 41 pay-per-call endpoints for AI agents: web scraping, document extraction, whole-site SEO audits, brand-ki…
  • 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 Entity-ID Resolver Resolves a company or crypto name or ticker into ranked entities with verified canonical IDs across registr…
  • 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-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…
  • Xquik Real-time X (Twitter) data API.
  • 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…