{"uid":"cap_CnHWQRXSPCOHvG_tCTuIp","slug":"delx-commerce-digest-header-verify-778ce20c","name":"Delx Commerce — Digest Header Verify","description":"Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.","url":"https://commerce.delx.ai/api/v1/x402/digest-header-verify?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string","maxLength":8192,"description":"Text supplied to Digest Header Verify; used only for this bounded calculation and processed in memory without retention."},"algorithm":{"type":"string","maxLength":8192,"description":"Algorithm supplied to Digest Header Verify; used only for this bounded calculation and processed in memory without retention."},"digest_base64":{"type":"string","maxLength":8192,"description":"Digest Base64 supplied to Digest Header Verify; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"matched":true,"algorithm":"sha-256","actual_base64":"ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0="},"schema":"delx/util-digest-header-verify/v1","status":"pass","evidence":{"retained":false,"input_sha256":"e2887c004f75ecae89be72af3d1ed97e6058d581b75c207eebceba1ccc080397","external_calls":0},"operation":"web_reliability:digest_header_verify"}},"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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_uQQljt9vdFZejmeHGTnZ1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies an HTTP Digest header by checking whether a given algorithm and base64-encoded digest match the provided text, returning a match result and the computed digest.","exampleAgentPrompt":"Can you verify whether the SHA-256 Digest header 'ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=' is correct for the text 'hello world'?","exampleUseCases":[{"title":"API Response Integrity Check","prompt":"I just received an API response with a SHA-256 Digest header value of 'ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=' — can you verify whether that matches the body text 'abc123responsedata'?"},{"title":"Webhook Payload Tamper Detection","prompt":"We received a webhook payload that says its SHA-256 digest is 'XohImNooBHFR0OVvjcYpJ3NgPQ1qq73WKhHvch0VQtg=' — please verify this against the raw payload text 'event=purchase&amount=99' so I know it wasn't tampered with."},{"title":"Pre-send Digest Header Validation","prompt":"Before I send this HTTP request, can you check that the digest header I generated — 'n4bQgYhMfWWaL+qgxVrQFaO/TxsrC4Is0V1sFbDwCgg=' using SHA-256 — actually matches my request body 'name=John&action=submit'?"}],"resultDescription":"A JSON object indicating whether the provided base64 digest matched the computed digest for the given text and algorithm ('matched': true/false), the algorithm used, the actual computed base64 digest, a pass/fail status, and evidence metadata including whether input was retained (always false), a SHA-256 fingerprint of the input, and the number of external calls made (always 0).","failureModes":["Invalid or unsupported algorithm value returns an error or failed match","Malformed base64 digest_base64 string causes a parsing error","Text exceeding 8192 characters is rejected","Missing required fields results in a validation error","Payment not completed via x402 protocol returns HTTP 402"],"whenToPreferThis":"Use this endpoint when an AI agent needs to verify the integrity of an HTTP Digest header without retaining any data — ideal for stateless, privacy-preserving content integrity checks. Preferred when you need cryptographic confirmation that a message body matches a received digest header, especially in automated pipelines handling untrusted API or webhook payloads. The pay-per-call USDC model (no signup) makes it suitable for ephemeral agent workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:53:59.934Z","isFirstParty":false,"canonicalSlug":"delx-commerce-digest-header-verify-778ce20c"}