{"uid":"cap_feIVBtrwHSa46DQfI4AIL","slug":"freetier-agent-api-link-checker-c73a06c1","name":"FreeTier Agent API — Link Checker","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/link-check?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":["urls"],"properties":{"urls":{"type":"string","description":"comma-separated absolute URLs, max 20"}}}}},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"broken":1,"checked":2,"results":[{"ms":120,"ok":true,"url":"https://example.com","status":200}]}},"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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_yr81_jmrfCsAXassaDxLu","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks one or more URLs for liveness, returning HTTP status codes and response times to identify broken links","exampleAgentPrompt":"Can you check whether these links are still working: https://example.com/page1, https://example.com/page2, and https://old-site.com/about — I want to know which ones are broken before I publish my newsletter.","exampleUseCases":[{"title":"Pre-publish link audit for newsletter","prompt":"Before I send out my weekly newsletter, can you check all these URLs to make sure none are broken: https://blog.example.com/post-1, https://docs.example.com/guide, https://partner.com/offer — flag any that are returning errors."},{"title":"Website broken link scan","prompt":"I need to verify these 10 links from my sitemap are all still live and returning 200s — here they are: https://mysite.com/about, https://mysite.com/pricing, https://mysite.com/blog, https://mysite.com/contact. Tell me response times too."},{"title":"Monitor third-party dependency URLs","prompt":"Can you check if these external API documentation URLs are still accessible: https://stripe.com/docs/api, https://openai.com/api, https://twilio.com/docs — I want to know which ones are up and how fast they respond."}],"resultDescription":"Returns a JSON object with a total count of checked URLs, a count of broken links, and a per-URL array containing the URL, a boolean ok flag, HTTP status code, and response latency in milliseconds.","failureModes":["Invalid or non-absolute URL in input causes validation error","More than 20 URLs submitted exceeds limit","Network timeout for a slow or unreachable host may count as broken","Private/localhost URLs may be unreachable from the checker's network","Non-HTTP(S) URLs (e.g. ftp://) not supported"],"whenToPreferThis":"Choose this endpoint when you need a quick, pay-per-call link health check for up to 20 URLs without setting up a monitoring service or signing up for an account. Especially useful for pre-publish checks, sitemap validation, or ad-hoc link audits inside an AI agent workflow. Prefer this over full-site crawlers when you have a specific list of URLs to check rather than a whole domain.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:51:01.575Z","isFirstParty":false,"canonicalSlug":"freetier-agent-api-link-checker-c73a06c1"}