{"uid":"cap_JVmahKf6yEecNoahi0wyC","slug":"freetier-agent-api-x402-services-directory-0cac1fd8","name":"FreeTier Agent API — x402 Services Directory","description":"Pay-per-call data API for AI agents: AI model prices and cost calculator, 4,259 MCP servers, email domain checks, text-to-JSON extraction, country/holiday/currency lookup, page and link checks, page-to-markdown, 2,230 verified APIs. x402, USDC on Base, no signup. Sources cited in every response.","url":"https://freetier-agent-api.pages.dev/api/x402-services?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"q":{"type":"string"},"chain":{"type":"string"},"limit":{"type":"string"},"status":{"enum":["verified","unverified"],"type":"string"},"category":{"type":"string"},"max_price":{"type":"string"}}}}},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"total":1,"results":[{"name":"Weather forecast","chains":["base"],"status":"verified","category":"data.weather","price_usd":0.01,"endpoint_url":"https://example.com/api/weather"}],"sources":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_n6n9DDGP8wBII4q8JKI_g","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Search and discover x402 pay-per-call APIs available for AI agents, filterable by query, chain, category, price, and verification status","exampleAgentPrompt":"Search the FreeTier Agent API directory for verified x402 APIs in the 'data.weather' category on Base that cost no more than $0.01 each, and return up to 5 results.","exampleUseCases":[{"title":"Discover cheap verified data APIs","prompt":"Find me all verified x402 APIs under $0.02 on Base that deal with country or holiday lookups — I want something my agent can call without signing up."},{"title":"Find MCP servers for AI tooling","prompt":"Search the x402 services directory for MCP servers — I'm building an AI agent and need to know what's available, preferably verified ones."},{"title":"Locate email domain check APIs","prompt":"Can you look up x402 APIs in the email or domain category? I need a pay-per-call option my agent can use to validate email domains without a subscription."}],"resultDescription":"Returns a JSON object with a total count and an array of matching x402 service listings, each including the service name, supported chains, verification status, category, price in USD, and endpoint URL. Every response also includes a sources array citing where the data came from.","failureModes":["No results returned if query terms don't match any indexed services","Empty results if category or chain filter is too narrow","Invalid enum value for 'status' field returns validation error","max_price or limit passed as non-numeric string may be rejected","Service index may be stale if newly listed APIs haven't been crawled yet"],"whenToPreferThis":"Use this endpoint when an AI agent needs to dynamically discover other x402 pay-per-call APIs — especially when looking for verified services on Base that accept USDC with no signup. Prefer this over generic API marketplaces when you specifically need x402-compatible endpoints filterable by blockchain, price cap, and verification status.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:48:09.030Z","isFirstParty":false,"canonicalSlug":"freetier-agent-api-x402-services-directory-0cac1fd8"}