{"uid":"cap_o42116aiKgOlllShwuqP5","slug":"delx-commerce-dns-txt-chunk-join-feef01df","name":"Delx Commerce DNS TXT Chunk Join","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/dns-txt-chunk-join?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"chunks":{"type":"array","items":{"type":"string","maxLength":8192},"maxItems":256,"description":"Chunks supplied to DNS Txt Chunk Join; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"value":"v=spf1 include:_spf.example.com -all","chunk_count":2},"schema":"delx/util-dns-txt-chunk-join/v1","status":"pass","evidence":{"retained":false,"input_sha256":"74dad3c252a36be8500ce9dbeb13fb06f47921e6bc9149a7085eda98eafca0ef","external_calls":0},"operation":"web_reliability:dns_txt_chunk_join"}},"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_uffyn4X7Pn7zuCQYmRt8s","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":"Joins an array of DNS TXT record chunks into a single concatenated string value, returning the assembled record along with verifiable evidence of in-memory-only processing.","exampleAgentPrompt":"Can you join these two DNS TXT record chunks into a single value for me: 'v=spf1 include:_spf.example.com' and '-all'? I need the assembled SPF record with a verifiable hash proving nothing was stored.","exampleUseCases":[{"title":"Reassemble split SPF record","prompt":"I have an SPF record split across two DNS TXT chunks — 'v=spf1 include:_spf.google.com include:sendgrid.net' and '-all'. Can you join them into a single assembled value and confirm the chunk count?"},{"title":"Reconstruct long DKIM public key","prompt":"My DKIM public key was split into three DNS TXT chunks because it exceeded the 255-character limit. Here they are: ['p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCg', 'KCAQEAr9dDkQkHJajxlNFbE4', 'w==']. Please join them into the full key string."},{"title":"Validate assembled DMARC record","prompt":"I retrieved these DMARC policy chunks from DNS: ['v=DMARC1; p=reject;', ' rua=mailto:dmarc@example.com']. Join them together and give me the SHA-256 of the input so I can verify the result."}],"resultDescription":"Returns a JSON object containing the fully joined DNS TXT record value, the count of input chunks processed, the operation schema identifier, a pass/fail status, and an evidence block including the input SHA-256 hash, a flag confirming no data retention, and the number of external calls made (always 0).","failureModes":["Input array exceeds 256 chunks — request rejected","Individual chunk string exceeds 8192 characters — validation error","Malformed or non-array input for chunks field — schema validation failure","Payment not received or x402 payment protocol failure — 402 response returned","Empty chunks array — may return empty string result with chunk_count 0"],"whenToPreferThis":"Use this endpoint when you need a lightweight, verifiable, pay-per-call utility to reassemble DNS TXT records that have been split across multiple chunks (common for long SPF, DKIM, or DMARC records). Prefer it over building custom string concatenation logic when you also need a cryptographic audit trail (SHA-256 of inputs) and explicit confirmation that no data is retained. It is especially useful in agent pipelines that handle DNS configuration, email deliverability setup, or domain authentication workflows and need a trustless, no-signup micro-service.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:53:52.974Z","isFirstParty":false,"canonicalSlug":"delx-commerce-dns-txt-chunk-join-feef01df"}