672 api sites that passed an agent-discoverability check — each one fetched the way an AI crawler fetches it, with no JavaScript. The check is what is paid for; the listing is free and earned by passing. Category and score are ours. Site owner? Ask for removal or disallow 402registry-check in robots.txt.
api.atms.nathanlidurin.comA REST API for central treasury management featuring CRUD operations for cash pooling, forecasting, bank reconciliation, and FX hedging.api · finance-and-crypto · score 70/100 · checked 2026-09-27 · what we found
api.babyblueviper.comA verification layer providing neutral verdicts and signed proofs for autonomous agents to validate outputs before irreversible actions.api · ai-and-agents · score 95/100 · checked 2026-09-27 · what we found
aura.rohnelt.devAura provides a persistence layer for autonomous agents including permanent email addresses, webhook URLs, durable memory storage, and state management tools.api · ai-and-agents · score 85/100 · checked 2026-09-27 · what we found
evidence.guildpilot.appAn API for website data extraction, change detection, and security auditing using pay-per-use settlement for machine-readable evidence.api · developer-tools · score 87/100 · checked 2026-09-27 · what we found
proppulse.theaslangroupllc.comPropPulse provides a suite of pay-per-query real estate intelligence endpoints for mortgage analysis, property valuation, and market data using USDC on the Base network.api · commerce · score 87/100 · checked 2026-09-27 · what we found
safefetch.schemasure.comThis API retrieves web pages through a security guardrail, converting content to markdown while identifying hidden text and potential prompt injection attempts for AI agents.api · ai-and-agents · score 98/100 · checked 2026-09-27 · what we found
tradepulse.theaslangroupllc.comTradePulse provides machine-readable global trade data including HS code classification, tariff rates, and landed cost calculations via a pay-per-query protocol for AI agents.api · commerce · score 94/100 · checked 2026-09-27 · what we found
waterpulse.theaslangroupllc.comAn API providing structured water intelligence data including groundwater levels, streamflow, drought status, and water quality using pay-per-query USDC payments.api · data-and-analytics · score 94/100 · checked 2026-09-27 · what we found
zlv402.wreckbots.ioA pay-per-query API providing risk scoring, entry signals, and liquidity analysis for Solana tokens using the x402 payment protocol.api · finance-and-crypto · score 53/100 · checked 2026-09-27 · what we found
agents.datamancer.ioThe site provides data services for registered business lookups and VIN decoding via specific API endpoints.api · data-and-analytics · score 50/100 · checked 2026-09-27 · what we found
agents.dubbleblack.comDubbleBlack offers an API service called Powder that provides behavioral commerce evidence and provenance metadata for product recommendations to AI agents.api · ai-and-agents · score 88/100 · checked 2026-09-27 · what we found
api.demandex.devAn API providing e-commerce demand intelligence by mining Reddit posts for product signals, intended for AI agents using per-call crypto payments.api · commerce · score 67/100 · checked 2026-09-27 · what we found
api.moltalyzer.xyzAn API providing real-time community intelligence feeds, sentiment analysis, and post-virality scoring for AI agents with per-call payments.api · ai-and-agents · score 71/100 · checked 2026-09-27 · what we found
api.statemind.aiThis service validates, repairs, and executes AI-generated Python code within a sandboxed environment to ensure it meets specified functional requirements and security policies.api · developer-tools · score 77/100 · checked 2026-09-27 · what we found
llm.gedx402.comA technical interface providing access to various tiers of the Qwen3 30B large language model including reasoning and code capabilities.api · ai-and-agents · score 54/100 · checked 2026-09-27 · what we found
macropulse.theaslangroupllc.comMacroPulse provides real-time financial intelligence and macroeconomic data endpoints for forex and CFD trading via pay-per-query USDC payments.api · finance-and-crypto · score 94/100 · checked 2026-09-27 · what we found
racingpulse.theaslangroupllc.comA suite of pay-per-query API endpoints providing global horse and greyhound racing intelligence including live odds, arbitrage detection, and form analysis.api · data-and-analytics · score 94/100 · checked 2026-09-27 · what we found
txguard.schemasure.comA preflight transaction analysis API for AI agents to decode and verify Base network transactions and x402 payments before signing.api · finance-and-crypto · score 98/100 · checked 2026-09-27 · what we found
api.nativebtc.orgAn API that translates Ethereum-style JSON-RPC requests into Bitcoin data, fee intelligence, and mempool insights using x402 pay-per-request.api · developer-tools · score 98/100 · checked 2026-09-27 · what we found
chrono.schemasure.comA deterministic API for resolving timezone, DST, business-day, and public-holiday data for agents, paid per call via x402.api · developer-tools · score 98/100 · checked 2026-09-27 · what we found
giftpulse.theaslangroupllc.comA set of API endpoints for AI agents to facilitate international mobile airtime top-ups and gift card purchases using cryptocurrency payments.api · ai-and-agents · score 94/100 · checked 2026-09-27 · what we found
gridpulse.theaslangroupllc.comA pay-per-query API providing global energy grid intelligence, including electricity rates, renewable energy profiles, and EV charging analysis using crypto payments.api · score 94/100 · checked 2026-09-27 · what we found
router.mudko.comA non-custodial value routing interface providing endpoints for fiat-to-crypto onramps, token swaps, and pay-per-call settlement for humans and autonomous agents.api · finance-and-crypto · score 78/100 · checked 2026-09-27 · what we found
sqlpermit.schemasure.comAn API service that validates PostgreSQL statements against security policies and issues signed execution permits for structural verification.api · developer-tools · score 98/100 · checked 2026-09-27 · what we found
stablecoinpulse.theaslangroupllc.comA pay-per-query API providing stablecoin market intelligence, including issuer compliance, yield comparisons, peg stability monitoring, and cross-chain flow tracking via USDC payments.api · finance-and-crypto · score 94/100 · checked 2026-09-27 · what we found
x402.clashofcoins.comA payment gateway and API designed for autonomous agents to discover, purchase, and verify digital items for the game Clash of Coins using the x402 protocol.api · ai-and-agents · score 96/100 · checked 2026-09-27 · what we found
agi.apify.comAn interface allowing AI agents to purchase prepaid Apify API tokens using agentic payment protocols like x402 and MPP.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
audio.halowerk.comThis site offers paid API endpoints for audio analysis, voice evidence measurement, speech rate calculation, and sidechain compression mixing for autonomous agents.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
finanz.halowerk.comThis site provides paid API endpoints for autonomous agents to access foreign exchange rates, economic calendars, SEC EDGAR filing data, and company registration lookups.api · finance-and-crypto · score 81/100 · checked 2026-09-27 · what we found
memory.fluidrack.comA durable JSON memory store for AI agents featuring TTL namespaces and OpenAPI documentation for programmatic integration.api · ai-and-agents · score 80/100 · checked 2026-09-27 · what we found
paket.halowerk.comThe site provides paid API endpoints for autonomous agents to access package version history, maintenance signals, and software lifecycle data.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
seo.halowerk.comThe site provides paid API endpoints for SEO auditing and repair plans, including checks for indexable status, HTTPS URLs, and title tags.api · marketing-and-seo · score 71/100 · checked 2026-09-27 · what we found
sicher.halowerk.comA suite of paid API endpoints for autonomous agents to perform CVE checks, generate bills of materials, verify licenses, and inspect container images.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
testnet.queryspigot.comA sandbox environment for developers to test Irish company data lookups using the x402 payment protocol on the Base Sepolia testnet.api · developer-tools · score 84/100 · checked 2026-09-27 · what we found
x402.miroshark.xyzAn API-based service that runs multi-agent simulations of social media reactions on Twitter, Reddit, and Polymarket using provided text or URLs.api · ai-and-agents · score 80/100 · checked 2026-09-27 · what we found
agent.halowerk.comA set of pay-as-you-go API endpoints for autonomous agents to manage state, webhooks, scheduled tasks, and file storage using USDC on the Base network.api · ai-and-agents · score 81/100 · checked 2026-09-27 · what we found
api.ibanforge.comIBANforge provides API services for IBAN validation, BIC lookup, and compliance risk scoring with support for Model Context Protocol and micropayments.api · finance-and-crypto · score 88/100 · checked 2026-09-27 · what we found
dev-agent402.throuzlabs.comA collection of pay-per-call HTTP endpoints for AI agents featuring Taiwan payroll calculation, address parsing, and company lookups using the x402 protocol.api · developer-tools · score 96/100 · checked 2026-09-27 · what we found
holiday.agentic-jp.comAn API providing Japanese public holiday data from 1955 to 2027 and business-day calculation using the x402 pay-per-call protocol.api · developer-tools · score 77/100 · checked 2026-09-27 · what we found
klima.halowerk.comThis site provides paid API endpoints for autonomous agents to calculate CO2 emissions, transport impacts, and GHG classifications using USDC on the Base Mainnet.api · ai-and-agents · score 81/100 · checked 2026-09-27 · what we found
markt.halowerk.comThis site offers pay-per-request API endpoints for real-time cryptocurrency market data from major exchanges, accessible via USDC payments on the Base network.api · finance-and-crypto · score 81/100 · checked 2026-09-27 · what we found
pathmint.edge.reportA service providing API endpoints for verifying the payment status and transaction history of on-chain addresses to prevent payment errors and fraud.api · finance-and-crypto · score 80/100 · checked 2026-09-27 · what we found
x402.halowerk.comA set of API endpoints for parsing, validating, and verifying x402 payment challenges and cryptographic receipts for autonomous agents on the Base network.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
api.kgninja.devAn API offering machine-payable endpoints for command error fixing, URL summarization, and shell script risk assessment.api · developer-tools · score 66/100 · checked 2026-09-27 · what we found
crier.vimabrosta.comCrier is a message relay service that allows AI agents to send emails, SMS, or webhooks via micropayments without requiring an account or API key.api · developer-tools · score 100/100 · checked 2026-09-27 · what we found
furigana.agentic-jp.comAn API for converting Japanese kanji to furigana or romaji with text normalization and classification features using the x402 pay-per-call protocol.api · developer-tools · score 77/100 · checked 2026-09-27 · what we found
modell.halowerk.comThe site provides paid API endpoints for autonomous agents to perform data drift checks, compare LLM pricing, route model tasks, and estimate costs.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
shield.vainplex.devShieldAPI provides a security preflight API for AI agents to check for prompt injections, breached data, and malicious infrastructure using the x402 payment protocol.api · ai-and-agents · score 92/100 · checked 2026-09-27 · what we found
x402.fiasignals.comThis site provides a payment gateway for automated risk assessment checks on EVM-compatible tokens before executing swaps.api · finance-and-crypto · score 76/100 · checked 2026-09-27 · what we found
x402.onhub.aiOnHub provides a pay-per-request API layer for software agents to access search, code execution, and text inference using USDC on the Base network.api · ai-and-agents · score 52/100 · checked 2026-09-27 · what we found
api.liquidagent.aiAn API for buying and managing tokenized US stocks and ETFs on-chain using USDC across Base, Polygon, and Solana networks.api · finance-and-crypto · score 94/100 · checked 2026-09-27 · what we found
api.polyform.orgMachine-payable data APIs for AI agents offering 67 endpoints for vehicle, domain, weather, and financial data via USDC on Base.api · ai-and-agents · score 74/100 · checked 2026-09-27 · what we found
audit.liquidlogicx.comAn API endpoint that provides a structured spend summary for agent wallets on the Base network for a transaction fee.api · developer-tools · score 77/100 · checked 2026-09-27 · what we found
pay.retraced.siteA pay-per-call API service providing AI and crypto entity intelligence data via x402 payments in USDC on Base.api · ai-and-agents · score 72/100 · checked 2026-09-27 · what we found
wetter.halowerk.comA weather data API that provides model ensemble comparisons, spread analysis, and agreement scores with native x402 payment support for automated agents.api · ai-and-agents · score 88/100 · checked 2026-09-27 · what we found
x402.onlybots.shopA set of pay-per-call endpoints for web scraping, PDF processing, and screenshots using USDC on the Base network without required accounts.api · developer-tools · score 76/100 · checked 2026-09-27 · what we found
api.ekospor.comAn API providing audited financial data and health indexes for Turkish football clubs with a pay-per-request model using USDC on the Solana blockchain.api · finance-and-crypto · score 98/100 · checked 2026-09-27 · what we found
data.finery.ccThis site provides API access to Singapore ACRA company registration data and MOE school directories using pay-per-call cryptocurrency payments.api · data-and-analytics · score 52/100 · checked 2026-09-27 · what we found
diet.agentic-jp.comAn API for searching Japanese National Diet members and meeting minutes with pay-per-call USDC payments.api · developer-tools · score 77/100 · checked 2026-09-27 · what we found
exclusions.cfsoft.usAn API providing pay-per-call screening services against federal healthcare and government exclusion lists like HHS-OIG LEIE and SAM.gov.api · developer-tools · score 75/100 · checked 2026-09-27 · what we found
mailpulse.theaslangroupllc.comMailPulse provides an x402-native API for AI agents to verify addresses, get price quotes, and send physical mail using USDC on Base without accounts or API keys.api · developer-tools · score 93/100 · checked 2026-09-27 · what we found
packages.cfsoft.usAn API providing abandonment-risk scores and status checks for WordPress, npm, and PyPI packages using live registry data.api · developer-tools · score 75/100 · checked 2026-09-27 · what we found
weather.agentic-jp.comAn API providing Japan Meteorological Agency forecasts and weather warnings using the x402 pay-per-call protocol for payments in USDC.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
workers.miodiollc.comAn x402-powered HTTP API providing real-time DeFi risk assessments for Aave v3, Lido, and ERC-4626 vaults, designed for autonomous agents.api · finance-and-crypto · score 65/100 · checked 2026-09-27 · what we found
api.datasieve.xyzDataSieve provides monitoring, coordination, and notarization infrastructure for ephemeral autonomous agents using wallet-based authentication and per-call payments.api · ai-and-agents · score 76/100 · checked 2026-09-27 · what we found
api.trustsource.ccA suite of x402-powered verification APIs for autonomous agents providing URL safety verdicts, prompt-injection detection, email authentication grading, and domain trust scoring.api · ai-and-agents · score 87/100 · checked 2026-09-27 · what we found
compliancepulse.theaslangroupllc.comA pay-per-query API for AI agents providing regulatory compliance checks, entity verification, and legal applicability data using the x402 payment protocol.api · ai-and-agents · score 94/100 · checked 2026-09-27 · what we found
cryptopulse.theaslangroupllc.comCryptoPulse provides educational guides on cryptocurrency security, taxation, and DeFi, alongside a suite of paid API endpoints for crypto intelligence and market data.api · finance-and-crypto · score 94/100 · checked 2026-09-27 · what we found
dealpulse.theaslangroupllc.comAn API and resource hub that verifies coupon codes, gift card rates, and deal stacking strategies using live data.api · commerce · score 91/100 · checked 2026-09-27 · what we found
marketpulse.theaslangroupllc.comThis site provides a suite of pay-per-query API endpoints for AI visibility analysis, content strategy, and marketing intelligence using the x402 payment protocol.api · marketing-and-seo · score 94/100 · checked 2026-09-27 · what we found
notary.forgemesh.ioA cryptographic service that issues signed Ed25519 attestations and Merkle proofs for AI model outputs using the Base blockchain for anchoring.api · ai-and-agents · score 97/100 · checked 2026-09-27 · what we found
x402.telnyx.comA gateway for Telnyx inference and audio services that allows AI agents to pay per request using USDC on the Base network without an account.api · ai-and-agents · score 72/100 · checked 2026-09-27 · what we found
api.commodities.shAn API providing primary-source commodity data, inventory reports, and COT data for AI agents with a pay-per-call USDC model.api · finance-and-crypto · score 85/100 · checked 2026-09-27 · what we found
citepulse.theaslangroupllc.comAn API service providing academic citation analytics, bibliography verification, and research metrics for AI agents and grant offices.api · developer-tools · score 94/100 · checked 2026-09-27 · what we found
data.rcqsignals.comA data oracle providing cryptographically signed market data and trading performance metrics for AI agents using a pay-per-fetch model.api · finance-and-crypto · score 63/100 · checked 2026-09-27 · what we found
filingspulse.theaslangroupllc.comAn API providing AI-generated summaries and structured data from SEC EDGAR filings and international financial documents with per-query payments.api · finance-and-crypto · score 94/100 · checked 2026-09-27 · what we found
musicwire.5432wire.comA service that converts MusicXML scores into audio and MIDI files with support for agent-based workflows and x402 payments.api · ai-and-agents · score 77/100 · checked 2026-09-27 · what we found
search.gedx402.comA search interface offering web and neural search endpoints compatible with Tavily and Exa formats for a usage-based fee.api · developer-tools · score 54/100 · checked 2026-09-27 · what we found
x402.chainquery.comAn independent Bitcoin Core JSON-RPC interface providing fifty-four read-only methods with pay-per-call settlement in USDC using the x402 protocol.api · finance-and-crypto · score 61/100 · checked 2026-09-27 · what we found
agents.smarterway.techA directory and machine-readable catalog of services that accept automated crypto payments for tasks like market trend watching, video generation, and risk screening.api · developer-tools · score 88/100 · checked 2026-09-27 · what we found
material.halowerk.comThis site offers technical API endpoints for cable mass calculations, DHL shipping labels, scrap metal margin analysis, AWG metric conversion, and CO2 emission factors.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
medien.halowerk.comA paid API service offering endpoints for image color palette extraction and speech-to-text transcription, billed via x402 in USDC.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
research.halowerk.comA set of API endpoints for autonomous agents to verify official sources, score text grounding, and search academic publications, with payments processed in USDC via Base Mainnet.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
solar.halowerk.comThis site offers several paid API endpoints for solar energy calculations, inverter load checks, and Victron log parsing, payable in USDC on the Base network.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
srv1334799.hstgr.cloudA monitoring tool and API that provides live demand data and market signals for agents using the x402 payment protocol on the Base network.api · ai-and-agents · score 91/100 · checked 2026-09-27 · what we found
transit.agentic-jp.comAn API providing real-time Tokyo train transit data, route planning, and delay information using the x402 pay-per-call protocol.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
x402.nsgoods.orgA suite of twelve pay-per-call APIs for AI agents covering crypto signals, sanctions screening, market regime analysis, and endpoint monitoring on Base and Solana.api · developer-tools · score 92/100 · checked 2026-09-27 · what we found
api.stelardigital.comA programmatic interface providing market regime data, grid trading parameters, and historical bot performance records via the x402 payment protocol.api · finance-and-crypto · score 67/100 · checked 2026-09-27 · what we found
api.x402-hosting.comAn API for managing web hosting projects, deployments, and renewals with integrated payment processing for AI agents.api · developer-tools · score 60/100 · checked 2026-09-27 · what we found
centry.cybercentry.co.ukA cybersecurity API for crypto launchpads to detect rug pulls, honeypots, and mint dilution via a pay-per-call auditing service.api · finance-and-crypto · score 90/100 · checked 2026-09-27 · what we found
dartapi.ljaysk.comAn API providing real-time Korean corporate disclosure events from DART and KONEPS procurement bid notices with pay-per-call USDC payments.api · finance-and-crypto · score 53/100 · checked 2026-09-27 · what we found
energy.halowerk.comA pay-per-request API for energy dispatch planning and market briefs covering German and European power grids, facilitating carbon-aware and cost-effective compute scheduling.api · score 92/100 · checked 2026-09-27 · what we found
fetchharbor.benlab.downloadA self-hosted API harbor providing modular services for web scraping, document conversion, and local AI inference with optional x402 payment integration.api · developer-tools · score 64/100 · checked 2026-09-27 · what we found
mcp.blocksize.infoBlocksize provides market intelligence and price data for AI agents through the Model Context Protocol, featuring crypto VWAP, bid/ask spreads, and macro snapshots.api · finance-and-crypto · score 99/100 · checked 2026-09-27 · what we found
md.fastdb.inA paid API service that converts web pages into Markdown or structured JSON for AI agents, using per-call payments via x402 on Base.api · developer-tools · score 90/100 · checked 2026-09-27 · what we found
signals.nsgoods.orgAn API providing machine-readable cryptocurrency market signals and technical indicators for Kraken spot pairs, payable via USDC over the x402 protocol.api · finance-and-crypto · score 73/100 · checked 2026-09-27 · what we found
api.basefeed.ioBasefeed provides pay-per-call API endpoints for Base blockchain gas prices, token metadata, and Morpho stablecoin yields using the x402 payment protocol.api · finance-and-crypto · score 76/100 · checked 2026-09-27 · what we found
handel.halowerk.comThis site offers a collection of paid API endpoints for autonomous agents, providing services for local business searches, corporate registry snapshots, and warehouse slotting optimization.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
karte.halowerk.comA set of API endpoints providing localized OpenStreetMap data for EV charging stations, venue accessibility, and vehicle route restrictions, billed in USDC.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found