{"uid":"cap_xPP4epPJPl-qPTT99WSZ9","slug":"email-deliverability-audit-spf-dkim-dmarc-537b55b5","name":"Email Deliverability Audit (SPF/DKIM/DMARC)","description":"Paid micro-utilities for cold-email outreach agents: domain deliverability audits, cold-email grading, template generation, plus a tools toolbox (hashing, JWT decode, IDs, slugs, JSON, regex, crypto prices, domain age, weather). Paid via x402 (USDC on Base). One signature per call. No keys. FREE CHECK: GET /preview/<paid-path> (same URL with /preview/ prefix) returns a 200 demo sample - verify output shape before paying. PAID CALL: GET the url -> 402 challenge -> sign + retry with X-PAYMENT -> settled on-chain (USDC, Base). Ready-to-paste client: GET /llms.txt section \"Pay in one call\". Catalog+MCP twin: /llms.txt.","url":"https://sigtap-outreach-api.sigtap.workers.dev/deliverability","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","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"example":{"spf":{"found":true,"issue":null,"record":"v=spf1 ...","all_in_one":true},"dkim":{},"dmarc":{"found":true,"policy":"none"},"checks":{},"domain":"example.com","verdict":"ready-to-send"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_vu-OYB4TJFsmuGCSGTG5V","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Audits a sending domain's SPF, DKIM, and DMARC DNS records to assess email deliverability health","exampleAgentPrompt":"Can you run a full SPF, DKIM, and DMARC deliverability audit on my sending domain acmecorp.com and tell me if there are any issues that might cause my emails to land in spam?","exampleUseCases":[{"title":"Cold email campaign pre-flight check","prompt":"Before I start sending cold outreach from outreach.mycompany.com, can you audit the SPF, DKIM, and DMARC records to make sure my deliverability setup is solid?"},{"title":"Troubleshooting emails landing in spam","prompt":"My emails from newsletter.brandname.com keep going to spam — can you check the SPF, DKIM, and DMARC configuration on that domain and tell me what's broken?"},{"title":"New domain email authentication verification","prompt":"I just set up a new sending domain sendgrid-relay.startupxyz.io — can you audit its deliverability records to confirm SPF, DKIM, and DMARC are all properly configured?"}],"resultDescription":"Returns a structured deliverability audit report covering the domain's SPF record validity, DKIM selector status, and DMARC policy configuration, including any misconfigurations, missing records, or policy weaknesses that could cause emails to be rejected or marked as spam.","failureModes":["Domain not found or does not exist — DNS lookup failure","Missing or malformed query parameter for domain","Rate limit exceeded or payment failure for x402 micropayment","DNS timeout or upstream resolver error","Domain has no email-related DNS records configured"],"whenToPreferThis":"Choose this endpoint when you need a quick, automated SPF/DKIM/DMARC audit for a specific sending domain, especially before launching cold email or outreach campaigns. It is ideal for agents embedded in email tooling workflows where deliverability pre-checks are needed programmatically. Prefer this over manual DNS lookup tools when you want a structured, machine-readable audit result covering all three major email authentication standards in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:43:55.609Z","isFirstParty":false}