{"uid":"cap_9n_Ep0IeaX8HEvxTMyRF9","slug":"x402-trust-layer-pre-x402-alchemy-guard-f6d0dff8","name":"x402 Trust Layer — Pre-x402 Alchemy Guard","description":"68 paid x402 trust infrastructure APIs: guard, semantic escrow, mandate diff, certified seller network, KYM, mandates, compliance, disputes, and orchestration.","url":"https://x402trustlayer.xyz/api/guard/pre-x402-alchemy?utm_source=zero.xyz","method":"POST","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["ok","allowed","summary"],"properties":{"ok":{"type":"boolean"},"allowed":{"type":"boolean"},"summary":{"type":"string"}}}}}}},"responseSchema":{"type":"json","example":{"ok":true,"allowed":true,"summary":"Paid response after x402 settlement"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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_1jgm-9FUtgkQTz-GX41Ll","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":"Pre-flight guard check that validates whether a GET, HEAD, or DELETE HTTP request is allowed under x402 trust infrastructure before payment settlement proceeds.","exampleAgentPrompt":"Before I pay to call that x402-protected API endpoint, run a pre-flight guard check on my GET request using the x402 Alchemy guard to confirm it's allowed under the trust layer.","exampleUseCases":null,"resultDescription":"Returns a JSON object with three fields: 'ok' (boolean indicating the call succeeded), 'allowed' (boolean indicating whether the request is permitted to proceed), and 'summary' (a human-readable explanation of the guard decision). Example: {ok: true, allowed: true, summary: 'Paid response after x402 settlement'}.","failureModes":["Invalid method supplied (only GET, HEAD, DELETE accepted) — likely 400 or validation error","Missing required 'type' or 'method' fields in input object — schema validation failure","Request blocked by guard rules — returns allowed: false with explanatory summary","Payment not settled or insufficient USDC — x402 payment required error","Network or upstream Alchemy integration failure — service unavailable response"],"whenToPreferThis":"Use this endpoint when you need to perform a pre-flight authorization check on a read-type HTTP request (GET, HEAD, or DELETE) before committing to an x402 micropayment. It is specifically designed for the x402 trust infrastructure's Alchemy integration and is the right choice when you want to validate whether a request will be permitted before incurring payment costs.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-03T00:43:40.378Z","isFirstParty":false,"canonicalSlug":"x402-trust-layer-pre-x402-alchemy-guard-f6d0dff8"}