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.
ffpipe.devAn API providing pay-per-call media processing, conversion, and inspection services using the x402 payment protocol on the Base network.api · developer-tools · score 52/100 · checked 2026-09-27 · what we found
kino402.comA pay-per-call API for generating AI video and text-to-speech using cryptocurrency payments via the x402 protocol.api · ai-and-agents · score 69/100 · checked 2026-09-27 · what we found
numberintel.devThis site provides pay-per-call APIs for phone number intelligence and x402 payment protocol attestation using USDC on the Base blockchain.api · developer-tools · score 63/100 · checked 2026-09-27 · what we found
paddock.financePaddock provides pre-payment verification and transaction data for AI agents to prevent fraud and ensure price accuracy before settling on-chain payments.api · ai-and-agents · score 89/100 · checked 2026-09-27 · what we found
x402-gateway.aiAn API gateway providing Swedish company and vehicle data with pay-per-request pricing via the x402 protocol using USDC.api · developer-tools · score 77/100 · checked 2026-09-27 · what we found
agentservices.toThe site provides APIs for autonomous agents to access market intelligence, web research, and on-chain signals using micropayments.api · ai-and-agents · score 60/100 · checked 2026-09-27 · what we found
gate402.appAn API marketplace allowing AI agents to pay for LLM inference and financial data using HTTP 402 and USDC without accounts.api · developer-tools · score 84/100 · checked 2026-09-27 · what we found
mechamanda.comA collection of pay-per-call API endpoints for horoscopes, Polymarket data, and concert searches utilizing the x402 accountless payment protocol.api · developer-tools · score 79/100 · checked 2026-09-27 · what we found
stableproduct.devAn API service for extracting Wirecutter recommendations and accessing product catalog data, including merchant offers and price history.api · developer-tools · score 83/100 · checked 2026-09-27 · what we found
voidfeed.aiThis platform provides machine-readable content architectures and structured datasets optimized for AI agents with a Lightning Network payment system.api · ai-and-agents · score 78/100 · checked 2026-09-27 · what we found
agentres.devAn API and MCP server that allows AI agents to book and monitor restaurant reservations on Resy using crypto payments or a subscription.api · ai-and-agents · score 83/100 · checked 2026-09-27 · what we found
aiagentsarchive.comA memory layer protocol for AI agents to buy and sell execution trails and research results to save tokens and time.api · ai-and-agents · score 92/100 · checked 2026-09-27 · what we found
onchainrouter.devAn API providing provider-neutral access to text, image, and speech models using USDC payments on the Base network with local spending controls.api · developer-tools · score 82/100 · checked 2026-09-27 · what we found
zaref.devThis site provides a JSON API for South African reference data including fuel prices, interest rates, tax tables, government tenders, and economic indicators.api · data-and-analytics · score 84/100 · checked 2026-09-27 · what we found
402oracle.comA machine-payable oracle providing signed attestations for business verification, price confirmation, and URL freshness paid via USDC.api · ai-and-agents · score 69/100 · checked 2026-09-27 · what we found
402sentinel.comA payment safety and compliance API for AI agents that provides risk scoring, counterparty vetting, and regulatory screening for on-chain transactions.api · ai-and-agents · score 53/100 · checked 2026-09-27 · what we found
agentum.latA payment agent service offering pay-per-call APIs for Brazilian business intelligence, KYC, and financial data using USDC on the Base network.api · developer-tools · score 73/100 · checked 2026-09-27 · what we found
ausca.comAusca provides pay-per-call, account-free APIs and Model Context Protocol services with explicit pricing and verifiable receipts for AI agents.api · developer-tools · score 66/100 · checked 2026-09-27 · what we found
pulsefeed.devProvides a trust and safety layer for AI agents to verify x402 payment endpoints through liveness checks, scam detection, and on-chain intelligence.api · ai-and-agents · score 92/100 · checked 2026-09-27 · what we found
toolvend.devA collection of pay-per-call APIs for legal entity lookups, VAT calculation, DNS queries, and web data extraction using the x402 payment protocol.api · developer-tools · score 87/100 · checked 2026-09-27 · what we found
twitr.shAn API and Claude Code skill for interacting with X (Twitter) via pay-per-call USDC payments without requiring an API key.api · developer-tools · score 85/100 · checked 2026-09-27 · what we found
alpha402x.comAn equity research API providing filing-grounded financial data and qualitative analysis, allowing agents to pay per call using USDC on the Base network.api · finance-and-crypto · score 77/100 · checked 2026-09-27 · what we found
entropy.ripThe site provides infrastructure and survival tools for autonomous AI agents, including residential proxies and dead man switches.api · ai-and-agents · score 42/100 · checked 2026-09-27 · what we found
goodsong.devProvides an API for AI agents to verify citations, legal cases, SEC filings, drug approvals, and software packages using deterministic evidence-backed checks.api · ai-and-agents · score 63/100 · checked 2026-09-27 · what we found
minifetch.comMinifetch provides a suite of pay-per-fetch tools for web scraping, metadata extraction, and technical SEO auditing designed for developers and AI agents.api · developer-tools · score 94/100 · checked 2026-09-27 · what we found
poolproof.ruAn API providing machine-payable security checks for DeFi pools, token deployer records, and liquidity analysis on Solana and other chains.api · finance-and-crypto · score 70/100 · checked 2026-09-27 · what we found
stableapify.devAn API gateway that allows users to search for Apify Store actors, execute runs, and retrieve dataset results using a pay-per-call model without an Apify account.api · developer-tools · score 83/100 · checked 2026-09-27 · what we found
uxus.financeA platform providing pay-per-call AI primitives on the Base network including scraping, LLM inference, and risk assessment via x402 payments.api · ai-and-agents · score 79/100 · checked 2026-09-27 · what we found
anywaypossible.comAnyway Possible provides decision-ready infrastructure and machine-readable checks for autonomous agents to verify payment readiness, merchant data, and web content before acting.api · ai-and-agents · score 98/100 · checked 2026-09-27 · what we found
btcnode.ukA Bitcoin node API that provides blockchain data and transaction broadcasting via pay-per-call microtransactions using USDC or Lightning.api · finance-and-crypto · score 68/100 · checked 2026-09-27 · what we found
horizonpulse.devA pay-per-call API suite on the Base network offering cryptocurrency market data, technical signals, and web scraping tools for AI agents using x402 micropayments.api · ai-and-agents · score 68/100 · checked 2026-09-27 · what we found
penny402.funA collection of low-cost API endpoints designed for autonomous agents to interact with using the x402 payment protocol.api · ai-and-agents · score 90/100 · checked 2026-09-27 · what we found
enclave402.comA marketplace of pay-per-call APIs for autonomous agents offering market signals, IPFS pinning, agent attestation, and seller vetting using USDC on the Base network.api · ai-and-agents · score 80/100 · checked 2026-09-27 · what we found
farouter.techA payment gateway for AI models that uses the x402 protocol to enable pay-per-call USDC settlements on Base and Solana without API keys or accounts.api · ai-and-agents · score 59/100 · checked 2026-09-27 · what we found
readx.shA read-only X/Twitter JSON API providing access to profiles, timelines, and search results via per-request micropayments without API keys.api · developer-tools · score 78/100 · checked 2026-09-27 · what we found
scopeapi.devSCOPE provides a suite of pay-per-request research and data analysis tools for autonomous agents accessible via an OpenAPI interface and USDC payments.api · developer-tools · score 49/100 · checked 2026-09-27 · what we found
svm402.comA service providing programmatic Solana token analysis and safety data with usage-based payments via the x402 protocol.api · finance-and-crypto · score 78/100 · checked 2026-09-27 · what we found
vendsdk.comA marketplace of pay-per-call HTTP utilities and research tools for agents and developers settled in USDC on the Base network.api · developer-tools · score 85/100 · checked 2026-09-27 · what we found
402utils.comA collection of pay-per-call micro utilities for AI agents including PDF rendering, website screenshots, and EU VAT validation using the x402 protocol.api · developer-tools · score 66/100 · checked 2026-09-27 · what we found
aiagentoracle.aiThis platform provides transaction preflight, token risk analysis, and market data for autonomous agents with a pay-per-decision model.api · ai-and-agents · score 53/100 · checked 2026-09-27 · what we found
stableenrich.devA unified interface providing pay-per-request access to various data enrichment, web scraping, and search APIs without requiring individual subscriptions.api · developer-tools · score 82/100 · checked 2026-09-27 · what we found
stablefinance.devA financial data API providing access to US equities fundamentals, SEC filings, insider trades, and macro interest rates with pay-per-request billing.api · finance-and-crypto · score 82/100 · checked 2026-09-27 · what we found
stockwaves.netAn API providing real-time Chinese market data, social trends, equity signals, and cross-asset macro analysis with pay-per-call USDC payments.api · finance-and-crypto · score 58/100 · checked 2026-09-27 · what we found
x402tap.comA collection of pay-per-call APIs designed for AI agents that use the x402 protocol for on-chain USDC payments without requiring API keys or signups.api · developer-tools · score 78/100 · checked 2026-09-27 · what we found
agenttoll.appA data service for AI agents to inspect Base blockchain tokens and pools with pay-per-call pricing via the HTTP 402 protocol.api · finance-and-crypto · score 99/100 · checked 2026-09-27 · what we found
archtools.devArch Tools provides a single API endpoint and MCP server for AI agents to access web scraping, AI generation, crypto data, and other utility tools with support for USDC payments.api · developer-tools · score 91/100 · checked 2026-09-27 · what we found
chainverdict.xyzAn API for autonomous agents to perform evidence-backed security checks on tokens, wallets, and identifiers before executing transactions.api · ai-and-agents · score 87/100 · checked 2026-09-27 · what we found
glim.shA single remote endpoint providing agents with live data from social platforms and the open web without requiring individual API keys.api · ai-and-agents · score 28/100 · checked 2026-09-27 · what we found
tariffmonkee.comA catalog of single-purpose web data APIs that AI agents can access by paying per call in USDC via the x402 protocol without accounts or API keys.api · ai-and-agents · score 96/100 · checked 2026-09-27 · what we found
vibesprings.netA suite of 40 pay-per-query API endpoints for AI agents covering weather, finance, and geospatial data using x402 micropayments on the Base network.api · developer-tools · score 84/100 · checked 2026-09-27 · what we found
x402engine.appA marketplace of pay-per-call APIs for AI agents that uses the x402 protocol to handle micropayments in stablecoins without subscriptions or API keys.api · developer-tools · score 89/100 · checked 2026-09-27 · what we found
clinkagent.comA marketplace for AI agents to purchase pay-per-call services including social media data, PDF processing, and prediction market odds using USDC on the Base network.api · ai-and-agents · score 66/100 · checked 2026-09-27 · what we found
dt0ur.onlineA directory of 70 HTTP tools for AI agents that are paid per request using the x402 protocol with USDC on Base or Solana.api · ai-and-agents · score 52/100 · checked 2026-09-27 · what we found
fanfare.runAn API providing sports data bundles for AI agents with a pay-per-request model using USDC on the Base blockchain.api · developer-tools · score 72/100 · checked 2026-09-27 · what we found
kronossignals.comA cryptocurrency market intelligence API providing derivatives data and price forecasts payable via x402 micropayments on the Base network.api · finance-and-crypto · score 79/100 · checked 2026-09-27 · what we found
soren.comA machine-readable API that provides a verified feed of free-to-keep PC games specifically for autonomous AI agents.api · ai-and-agents · score 97/100 · checked 2026-09-27 · what we found
stabletravel.devAn API that provides pay-per-request travel data including flight prices, award availability, and real-time tracking for autonomous agents.api · developer-tools · score 72/100 · checked 2026-09-27 · what we found
toll402.devA gateway for AI agents to access and pay for tools on a per-call basis using USDC on the Base network without requiring API keys.api · developer-tools · score 96/100 · checked 2026-09-27 · what we found
whaletape.xyzThis site offers on-chain Hyperliquid whale positioning data and market signals accessible via machine-readable pay-per-request API calls.api · finance-and-crypto · score 87/100 · checked 2026-09-27 · what we found
answerpool.ioAnswerPool provides an API and MCP server for retrieving joined, cross-corpus data from public sources like SEC EDGAR, NIH, and USAspending with verifiable forecasting scores.api · data-and-analytics · score 81/100 · checked 2026-09-27 · what we found
apexrunner.aiThis platform provides cryptocurrency trading signals and market intelligence to AI agents using a pay-per-call micropayment system on the Base network.api · finance-and-crypto · score 95/100 · checked 2026-09-27 · what we found
modelprices.xyzAn API providing per-token pricing and technical limits for over 2,000 large language models across multiple providers using a pay-per-call payment system.api · developer-tools · score 78/100 · checked 2026-09-27 · what we found
stablesocial.devA unified API providing pay-per-request access to social media data and analytics from over 20 platforms including TikTok, Instagram, and LinkedIn.api · developer-tools · score 82/100 · checked 2026-09-27 · what we found
stationfx.comA function marketplace for AI agents offering economic data and shared state slots via x402 micropayments on Base.api · ai-and-agents · score 86/100 · checked 2026-09-27 · what we found
x402stock.xyzA pay-per-call API offering market and economic data including stocks, crypto, and macro statistics specifically for AI agents using the x402 payment standard.api · finance-and-crypto · score 74/100 · checked 2026-09-27 · what we found
2s.ioA directory of over 500 pay-per-call endpoints for AI agents featuring infrastructure for ground-truth data, AI models, and wallet-based storage using USDC.api · developer-tools · score 75/100 · checked 2026-09-27 · what we found
agent402.toolsA directory and gateway for AI agents to access over 500 pay-per-call tools and models using on-chain payments or credit cards without accounts.api · ai-and-agents · score 100/100 · checked 2026-09-27 · what we found
agentbit.appThe site provides a collection of machine-readable API endpoints for AI agents to perform tasks like company enrichment, text processing, and data search using pay-per-call payments.api · developer-tools · score 52/100 · checked 2026-09-27 · what we found
apiacre.comA directory of pay-per-call HTTP services and Model Context Protocol tools for agents, supporting automated payments in USDC on the Base and Solana blockchains.api · developer-tools · score 95/100 · checked 2026-09-27 · what we found
blockrun.aiBlockRun provides a unified API gateway for AI agents to access multiple LLMs, tool APIs, and data sources with integrated payment routing.api · ai-and-agents · score 95/100 · checked 2026-09-27 · what we found
netintel.devA suite of network intelligence endpoints for DNS, SSL, WHOIS, and email OSINT that uses a pay-per-call model without API keys.api · developer-tools · score 77/100 · checked 2026-09-27 · what we found
phion.systemsAn API for AI agents to fetch, normalize, and verify public source evidence with cryptographic receipts and safety checks.api · developer-tools · score 64/100 · checked 2026-09-27 · what we found