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.onesource.ioA blockchain data API providing live chain reads, market data, and reserve protocol information for AI agents with per-call or subscription payment options.api · developer-tools · score 93/100 · checked 2026-09-27 · what we found
api.signalfuse.coAn API service providing trading intelligence tools for AI agents, featuring real-time signals, sentiment analysis, and pay-per-call pricing via USDC on Base.api · finance-and-crypto · score 88/100 · checked 2026-09-27 · what we found
api.truthbear.coA verifiable data API providing official-source environmental, financial, and regulatory facts for AI agents using pay-per-call blockchain payments.api · data-and-analytics · score 98/100 · checked 2026-09-27 · what we found
euroland.halowerk.comPaid endpoints providing surface elevation, slope, and gradient data for Europe based on Copernicus DEM GLO-30 models for use by autonomous agents.api · data-and-analytics · score 81/100 · checked 2026-09-27 · what we found
landvergleich.halowerk.comA collection of paid API endpoints for comparing geographical and geological data between two European coordinates, including elevation, slope, and soil composition.api · data-and-analytics · score 81/100 · checked 2026-09-27 · what we found
oraclepost.higgsfield.appA directory of sixteen x402 API endpoints on the Base blockchain offering live chain data and computation services for a fee in USDC.api · finance-and-crypto · score 77/100 · checked 2026-09-27 · what we found
quartermaster.surewhynot.appA pay-per-call API platform offering x402 inspection, crypto settlement verification, and AI utilities for agents using USDC on Base.api · developer-tools · score 92/100 · checked 2026-09-27 · what we found
x402.forgemesh.ioA collection of utility APIs for AI agents that use the x402 protocol for per-call micropayments on the Base network without requiring API keys.api · developer-tools · score 87/100 · checked 2026-09-27 · what we found
x402.professorsausages.comA marketplace of pay-per-call APIs for AI agents covering financial data, on-chain analytics, and identity verification using crypto payments.api · ai-and-agents · score 72/100 · checked 2026-09-27 · what we found
agent.pocket.networkA marketplace of pay-per-call data services and blockchain endpoints for AI agents using gasless payment protocols without requiring accounts.api · developer-tools · score 95/100 · checked 2026-09-27 · what we found
agents.x402stock.xyzA data service providing market and economic information including stocks, crypto, macro indicators, and SEC filings for AI agents with pay-per-request billing.api · finance-and-crypto · score 91/100 · checked 2026-09-27 · what we found
api.sirenic.euAn API providing official European company registry data, including financial records and compliance checks, with pay-per-call pricing for AI agents and developers.api · developer-tools · score 92/100 · checked 2026-09-27 · what we found
atlantikland.halowerk.comThe site provides paid API endpoints for autonomous agents to access geographical, soil, and elevation data for Ireland using USDC on the Base Mainnet.api · data-and-analytics · score 81/100 · checked 2026-09-27 · what we found
baltikum.halowerk.comThe site provides paid API endpoints for autonomous agents to access geographical and soil data for Estonia, including elevation, slope, and soil composition.api · data-and-analytics · score 81/100 · checked 2026-09-27 · what we found
data.greeneris.ioAn API and Model Context Protocol provider for AI agents to perform European business verification, insolvency checks, and data lookups using pay-per-call USDC payments.api · developer-tools · score 93/100 · checked 2026-09-27 · what we found
market.datapackvibe.comA marketplace of digital services for AI agents to purchase procedural game assets, names, and narrative content using cryptocurrency.api · ai-and-agents · score 57/100 · checked 2026-09-27 · what we found
mitteleuropa.halowerk.comA collection of paid API endpoints for autonomous agents offering geographical and soil data for the Austrian region with USDC payments on the Base Mainnet.api · developer-tools · score 81/100 · checked 2026-09-27 · what we found
nordland.halowerk.comA directory of paid API endpoints for autonomous agents to access geographic, soil, and environmental data for Denmark with payments handled in USDC.api · ai-and-agents · score 81/100 · checked 2026-09-27 · what we found
x402.ottoai.servicesAn API gateway offering 88 pay-per-call services for market intelligence, DeFi execution, and AI tools using the x402 payment protocol on Base and Solana.api · developer-tools · score 97/100 · checked 2026-09-27 · what we found
ostland.halowerk.comA directory of paid API endpoints for autonomous agents providing geographic, elevation, and soil data for Bulgaria with USDC payments on the Base Mainnet.api · data-and-analytics · score 81/100 · checked 2026-09-27 · what we found
suedland.halowerk.comThe site provides paid API endpoints for geographical and soil data concerning Spain, payable in USDC for autonomous agents.api · data-and-analytics · score 71/100 · checked 2026-09-27 · what we found
agentshelf.syntexa.chA developer platform providing paid API endpoints for AI agents on the Base mainnet with support for OpenAPI and agent discovery.api · developer-tools · score 72/100 · checked 2026-09-27 · what we found
lookups.nlA pay-per-call API for AI agents to validate EU VAT, EORI, and LEI numbers, check IBANs, look up public holidays, and retrieve domain registration data.api · developer-tools · score 48/100 · checked 2026-09-27 · what we found
usaref.devAn API providing North American government reference data including interest rates, tax information, and minimum wages with verifiable source citations.api · data-and-analytics · score 96/100 · checked 2026-09-27 · what we found
anansidata.xyzA pay-per-call data service for AI agents providing historical records of prediction market order books, model pricing, and blockchain gas fees.api · data-and-analytics · score 83/100 · checked 2026-09-27 · what we found
asia-pulse.comAsia Pulse provides real-time market intelligence, including kimchi premium data and Korea equity chain analysis, structured as JSON endpoints for AI agents and traders.api · finance-and-crypto · score 86/100 · checked 2026-09-27 · what we found
pathcoursehealth.comAn autonomous machine-to-machine protocol that sells AI inference and data to software agents using USDC on the Base network.api · ai-and-agents · score 60/100 · checked 2026-09-27 · what we found
socialintel.devA pay-per-request API and MCP server for searching Instagram influencers and business emails using USDC on the Base or Solana networks.api · marketing-and-seo · score 85/100 · checked 2026-09-27 · what we found
zlurp.aiA web scraping API that converts URLs to markdown and utilizes the x402 protocol for per-request USDC payments on the Base network.api · developer-tools · score 86/100 · checked 2026-09-27 · what we found
agentic-trades.aiA capital markets knowledge graph providing financial disclosure data and company records across twelve sovereign jurisdictions for AI agents and automated systems.api · finance-and-crypto · score 75/100 · checked 2026-09-27 · what we found
agentic-x402.aiA paid API endpoint implementing the HTTP 402 protocol for AI agents to make micro-payments in USDC on the Base network without accounts.api · ai-and-agents · score 75/100 · checked 2026-09-27 · what we found
ccpcrate.caThis site provides a deterministic Model Context Protocol (MCP) server for calculating Canadian corporate tax rates, deductions, and provincial layers for CCPCs.api · finance-and-crypto · score 51/100 · checked 2026-09-27 · what we found
fetchweb.netFetchWeb offers a pay-per-call API for AI agents to perform web extraction, metadata probing, and context optimization using USDC payments on the Base network.api · ai-and-agents · score 88/100 · checked 2026-09-27 · what we found
deposit.nowAn open x402 funding rail that allows agents to fund Base or Solana wallets or provision managed child wallets through HTTP calls without an API key.api · ai-and-agents · score 98/100 · checked 2026-09-27 · what we found
masterclaw.devAn API gateway on the Base network providing research synthesis and chat completion services using a pay-per-call payment model without requiring user accounts.api · developer-tools · score 36/100 · checked 2026-09-27 · what we found
odood.comA service that extracts structured content from URLs and sanitizes it against prompt injection for AI models.api · developer-tools · score 67/100 · checked 2026-09-27 · what we found
policycheck.toolsThis site provides an API and MCP tool that extracts and signs machine-readable policy data from e-commerce sites for use by AI agents during transactions.api · ai-and-agents · score 59/100 · checked 2026-09-27 · what we found
trustscore.devAn API for real-time phone number fraud detection that provides trust scores and risk flags for AI agents and applications.api · developer-tools · score 74/100 · checked 2026-09-27 · what we found
us-agentic.comA commerce infrastructure for autonomous agents providing metered utility services such as markdown extraction and schema enforcement paid per call on the Base mainnet.api · ai-and-agents · score 64/100 · checked 2026-09-27 · what we found
jsonrecon.comThis service provides structured Schema.org JSON-LD extraction and product verification from URLs for use by AI agents and machine-readable systems.api · ai-and-agents · score 97/100 · checked 2026-09-27 · what we found
preflight402.comAn API providing deterministic validation checks for AI agents across domains including software dependencies, Bitcoin transactions, and EU legal citations.api · developer-tools · score 47/100 · checked 2026-09-27 · what we found
stablebase.devAn interface for provisioning and querying Postgres databases using micropayments via AgentCash.api · developer-tools · score 82/100 · checked 2026-09-27 · what we found
stablemesh.devA pay-per-request API for 3D model generation, retexturing, and animation using cryptocurrency micropayments on the Base, Solana, and Tempo networks.api · ai-and-agents · score 83/100 · checked 2026-09-27 · what we found
acoda.xyzA pay-per-call JSON API for AI agents providing cryptocurrency liquidation data and heatmaps sourced from centralized and decentralized exchanges.api · finance-and-crypto · score 95/100 · checked 2026-09-27 · what we found
coverbureau.comA remote MCP server for AI agents to perform pay-per-call compliance checks and data extraction on US Certificates of Insurance using USDC on Base.api · ai-and-agents · score 72/100 · checked 2026-09-27 · what we found
ip402.xyzAn IP geolocation and ASN API that uses micropayments via HTTP 402 for per-call settlement without requiring user accounts or API keys.api · developer-tools · score 31/100 · checked 2026-09-27 · what we found
regionfetch.devA web fetch API that provides geo-targeted data retrieval from five countries with verifiable Ed25519 signed receipts.api · developer-tools · score 52/100 · checked 2026-09-27 · what we found
slidingbox.aiA micro-SaaS studio offering single-purpose APIs for machine-to-machine and agent-to-agent transactions, including a live hydrate/dehydrate service.api · developer-tools · score 85/100 · checked 2026-09-27 · what we found
clawg.networkA registry of signed token records that allows Solana token controllers to publish verified metadata and links using cryptographic signatures.api · finance-and-crypto · score 98/100 · checked 2026-09-27 · what we found
cracked.aiAn API gateway for AI agents to discover, call, and fund over 81,000 different tools and MCP servers with a single key.api · developer-tools · score 92/100 · checked 2026-09-27 · what we found
fileshareforagents.onlineAn API providing temporary JSON and file storage for AI agents using the x402 protocol for micro-payments on the Base network.api · developer-tools · score 52/100 · checked 2026-09-27 · what we found
url2md.ioAn API and MCP server that converts PDFs and web pages to Markdown, handling JavaScript rendering and automated payments for sites with x402 tolls.api · developer-tools · score 79/100 · checked 2026-09-27 · what we found
api2ls.comA collection of pay-per-call utility APIs for tasks like web scraping, markdown extraction, SVG conversion, and file format transformation using on-chain payments.api · developer-tools · score 72/100 · checked 2026-09-27 · what we found
rugsense.xyzA service providing risk scores and launch intelligence for cryptocurrency tokens on the Base network via API and MCP tools.api · finance-and-crypto · score 71/100 · checked 2026-09-27 · what we found
runwayoracle.comA weather forecast API providing temperature nowcasts and daily high strike probabilities for prediction market settlement stations, payable via USDC on the Base network.api · finance-and-crypto · score 71/100 · checked 2026-09-27 · what we found
stabletickets.devA developer interface providing pay-per-request access to Ticketmaster Discovery API endpoints for searching events, venues, and attractions without a personal API key.api · developer-tools · score 83/100 · checked 2026-09-27 · what we found
witnessd.vipA service that independently fetches, hashes, and timestamps URL or API responses to provide verifiable cryptographic evidence for agents and humans.api · ai-and-agents · score 66/100 · checked 2026-09-27 · what we found
hermesplant.comHermes Plant provides an API-based safety layer for autonomous agents to validate and audit tool executions, shell commands, and x402 payments through deterministic policy gates.api · ai-and-agents · score 91/100 · checked 2026-09-27 · what we found
scorestatus.devA service providing live sports box scores and play-by-play updates for integration into AI agent status lines via a paid API.api · ai-and-agents · score 78/100 · checked 2026-09-27 · what we found
stablejobs.devA job search API platform that enables automated role discovery and data collection via pay-per-request micropayments.api · developer-tools · score 78/100 · checked 2026-09-27 · what we found
whodeployed.wtfA research lab API offering per-request access to telemetry, trade signals, and data on prediction markets, Solana memecoins, and insider trading activity.api · finance-and-crypto · score 48/100 · checked 2026-09-27 · what we found
amoraw.xyzA suite of micro-transactional HTTP tools for agents including URL-to-markdown conversion, request echoing, and CAIP network resolution payable via USDC on the Base network.api · ai-and-agents · score 51/100 · checked 2026-09-27 · what we found
execbox.xyzAn execution environment for over 40 programming languages that utilizes USDC micropayments on the Base blockchain for pay-per-request code sandboxing.api · developer-tools · score 58/100 · checked 2026-09-27 · what we found
filedge.ioAn API for parsing SEC filings and earnings calls into structured JSON using the x402 protocol for inline USDC payments on the Base network.api · finance-and-crypto · score 82/100 · checked 2026-09-27 · what we found
longwatch.devA monitoring service that polls websites, RSS feeds, crypto prices, and SEC filings for changes and allows AI agents to retrieve delta alerts via a cursor-based REST or MCP interface.api · developer-tools · score 87/100 · checked 2026-09-27 · what we found
afriref.devA JSON API providing African government reference data such as central bank rates, taxes, and labor laws with primary source citations.api · data-and-analytics · score 96/100 · checked 2026-09-27 · what we found
mearef.devThis site provides machine-readable Middle Eastern government reference data including interest rates, tax values, and public holidays via a pay-per-call API.api · data-and-analytics · score 96/100 · checked 2026-09-27 · what we found
mysticapi.comAn API providing deterministic calculations for Human Design bodygraphs, astrology charts, and numerology data based on JPL-validated ephemeris.api · developer-tools · score 83/100 · checked 2026-09-27 · what we found
stabletube.devA pay-per-call API that downloads YouTube videos server-side and provides temporary S3 storage links for the files.api · developer-tools · score 83/100 · checked 2026-09-27 · what we found
ausref.devAn API providing machine-readable Australasian government reference data such as central-bank rates, VAT, and minimum wages with official citations and verification dates.api · developer-tools · score 96/100 · checked 2026-09-27 · what we found
euroref.devAn API providing European government reference data including tax rates, policy rates, and public holidays with links to official sources.api · data-and-analytics · score 96/100 · checked 2026-09-27 · what we found
financial-analyst.aiAn API providing deterministic financial modeling endpoints for AI agents, covering LBO models, real estate underwriting, waterfalls, and Monte Carlo simulations.api · finance-and-crypto · score 70/100 · checked 2026-09-27 · what we found
latamref.devAn API providing Latin American government reference data including tax rates, policy rates, and public holidays with official citations.api · data-and-analytics · score 96/100 · checked 2026-09-27 · what we found
stablecrypto.devA pay-per-request unified interface for crypto data providers including CoinGecko, DefiLlama, and Alchemy, designed for autonomous AI agents.api · finance-and-crypto · score 83/100 · checked 2026-09-27 · what we found
x402toll.comAn API providing verified financial, tax, and legal calculators for AI agents using pay-per-call USDC payments on the Base blockchain.api · developer-tools · score 95/100 · checked 2026-09-27 · what we found
agentsapi.topAn on-chain intelligence API offering address labeling, transaction explanations, and entity clustering services for developers and traders on the Base network.api · finance-and-crypto · score 73/100 · checked 2026-09-27 · what we found
asiaref.devProvides API access to Asian government reference data including policy rates, taxes, and minimum wages with official citations for AI agents and developers.api · data-and-analytics · score 96/100 · checked 2026-09-27 · what we found
fetchdelta.comAn API providing tools for AI agents to read web pages, compare content changes, extract pricing information, and set up daily page monitoring using cryptocurrency payments.api · developer-tools · score 93/100 · checked 2026-09-27 · what we found
hirescrape.comAn API marketplace and scraping service for AI agents that uses pay-per-call USDC settlements via the 402 Payment Required protocol.api · developer-tools · score 90/100 · checked 2026-09-27 · what we found
long.eventsA data service providing real-world event, schedule, and venue information specifically formatted for AI agents via Model Context Protocol or REST endpoints.api · ai-and-agents · score 88/100 · checked 2026-09-27 · what we found
marketplaceforaiagents.comA marketplace offering pay-per-call HTTP APIs for AI agents, including YouTube transcripts, web search, and shopping data, settled in USDC via x402.api · ai-and-agents · score 98/100 · checked 2026-09-27 · what we found
signalharness.aiSignalHarness provides a directory of pay-per-use APIs and agent-native digital products including toolkits and infrastructure for AI systems using USDC on the Base network.api · developer-tools · score 92/100 · checked 2026-09-27 · what we found
toolrail.devA collection of 30 pay-per-call API endpoints for AI agents providing LATAM financial data, document processing, and validation services using crypto micropayments.api · developer-tools · score 99/100 · checked 2026-09-27 · what we found
a2apay.ioA marketplace for on-demand AI responses and persistent agent memory settled per request in USDC via the x402 protocol on the Base network.api · ai-and-agents · score 66/100 · checked 2026-09-27 · what we found
hexscan.xyzA token security scanner that checks ERC-20 contracts for honeypots and rug-pull risks using the x402 payment protocol.api · finance-and-crypto · score 57/100 · checked 2026-09-27 · what we found
overwing.aiOverwing provides an API for evaluating LLM outputs against custom rules, returning pass, fail, or review verdicts with calibrated confidence.api · ai-and-agents · score 83/100 · checked 2026-09-27 · what we found
stablepeopledata.devA pay-per-request API providing access to person and company enrichment data and search functionality using Elasticsearch DSL and SQL.api · developer-tools · score 78/100 · checked 2026-09-27 · what we found
agenttoll.devA directory and endpoint provider offering over 100 paid data tools and work products for AI agents using the x402 payment protocol on the Base network.api · ai-and-agents · score 69/100 · checked 2026-09-27 · what we found
defi-signals.orgAn API providing market data, DeFi yields, and funding rates for AI agents using the x402 payment protocol on the Base network.api · finance-and-crypto · score 78/100 · checked 2026-09-27 · what we found
dwelldata.ioThis site provides an API for real estate data including apartment listings, Ohio tax delinquency records, and sheriff sale information with per-query pricing in USDC.api · commerce · score 82/100 · checked 2026-09-27 · what we found
lotusnetworkapi.comA collection of pay-per-call services on the Base network including AI media generation, transcription, and gas forecasting that settle via USDC.api · developer-tools · score 78/100 · checked 2026-09-27 · what we found
stable-deepline.devThe site provides a programmatic interface for lead generation services including email discovery, phone finding, company enrichment, and advertising intelligence.api · marketing-and-seo · score 78/100 · checked 2026-09-27 · what we found
stableflare.devAn API providing pay-per-request access to Replicate AI models, browser rendering, and image processing via integrated micropayment protocols.api · developer-tools · score 83/100 · checked 2026-09-27 · what we found
coinslot.devA platform providing micro-APIs that AI agents can pay for and use autonomously per call via the x402 protocol and USDC.api · ai-and-agents · score 68/100 · checked 2026-09-27 · what we found
schemasure.comSchemaSure provides pay-per-call APIs for agents to perform tasks like JSON extraction, SQL validation, transaction preflighting, and content sanitization using crypto-based payments.api · developer-tools · score 99/100 · checked 2026-09-27 · what we found
stableupload.devA pay-per-upload file hosting service for AI agents that supports cryptocurrency payments and provides storage links for various durations.api · developer-tools · score 92/100 · checked 2026-09-27 · what we found
attester.devA machine-payable platform offering cryptographically signed verification and research services for AI agents on the Base blockchain.api · ai-and-agents · score 66/100 · checked 2026-09-27 · what we found
oblique.marketsAn autonomous machine-to-machine execution node providing pay-per-call services and Model Context Protocol endpoints for AI agents.api · ai-and-agents · score 70/100 · checked 2026-09-27 · what we found
pennyregwatch.comPennyAPI provides pay-per-call web search and local business data for autonomous agents using the x402 protocol on the Base blockchain.api · developer-tools · score 74/100 · checked 2026-09-27 · what we found
stableninja.devA collection of data APIs for accessing live information from Waze, Google Play Store, Yelp, Walmart, Wayfair, and Amazon via x402 payments.api · developer-tools · score 82/100 · checked 2026-09-27 · what we found