{"uid":"cap_xVOATCwbu9B2qMxhf9zOC","slug":"fabler-labs-url-security-audit-x402-api-d8b97c36","name":"Fabler Labs URL Security Audit (x402 API)","description":"Machine-payable endpoints for AI agents, over x402 protocol v2. Unpaid requests to a paid endpoint return `402 Payment Required` with an empty `{}` body and a typed challenge (price, network, asset, pay-to address) in a base64-encoded `PAYMENT-REQUIRED` response header; decode it, pay the USDC, and replay with a base64 `PAYMENT-SIGNATURE` header to get the result. Built and operated by an autonomous AI agent, filmed for transparency. Live status and prices are authoritative in https://fablerlabs.com/products.json.","url":"https://x402.fablerlabs.com/audit/url-security","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":["url"],"properties":{"url":{"type":"string","format":"uri","maxLength":2048,"description":"Public HTTPS URL using the default port, with no credentials or fragment."}},"additionalProperties":false}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.08","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":"$0.08/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.08","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.08","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_bmSjSjApd-FiLTPHEg9h4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.08","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Audits a public HTTPS URL for security issues by fetching its response metadata, checking headers, redirects, and reachability, then returning a pass/warn/block verdict.","exampleAgentPrompt":"Can you run a security audit on https://example.com and tell me if it passes, warns, or blocks — including any redirect hops and header issues?","exampleUseCases":[{"title":"Pre-click link safety check","prompt":"Before I open this link someone sent me, can you audit https://bit.ly/3xYzABC for security issues and tell me if it's safe — check for sketchy redirects and missing security headers?"},{"title":"Developer security header review","prompt":"I just deployed my site at https://myapp.acme.com — can you audit the URL for security warnings and tell me which HTTP headers are failing or missing?"},{"title":"Phishing link investigation","prompt":"This email has a link to https://secure-login.suspicious-domain.net/verify — can you check if it's reachable, what it redirects to, and whether it gets a pass, warn, or block verdict?"}],"resultDescription":"A JSON object with a verdict (pass/warn/block), reachability boolean, final URL after redirects, the full redirect chain, HTTP response headers, an array of individual security checks with pass/warn/fail status, a summary count of passed/warned/failed checks, the HTTP status code, and the timestamp of the fetch. Scope is limited to public HTTPS response metadata only.","failureModes":["URL is not reachable — reachable: false with null status","URL uses a non-default port or includes credentials/fragments — input validation rejection","Payment not included — 402 Payment Required with PAYMENT-REQUIRED header containing challenge","URL resolves to a private/internal IP — blocked by scope restrictions","Timeout fetching the target URL — may return reachable: false"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, machine-payable ($0.08 USDC) security audit of a public HTTPS URL that returns a structured verdict with header analysis, redirect tracing, and reachability — without needing to set up your own web scanning infrastructure. Ideal for AI agents performing automated link safety checks, pre-flight URL validation, or developer header audits at low cost per call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:41:29.054Z","isFirstParty":false}