{"uid":"cap_398EI0JSiu-wbxec5kKQ8","slug":"email-deliverability-diagnostic-6db7f33b","name":"Email Deliverability Diagnostic","description":"Bundled execution of the Email deliverability workflow - Diagnose why a domain's email lands in spam: SPF posture, DMARC policy, DKIM key strength, MX targets, and a composite 0–100 score. One x402 payment runs 6 underlying tools (spf-check, dmarc-check, dkim-lookup, email-deliverability, email-validate, dns-lookup); partial-success per step.","url":"https://agent402.tools/api/skill/email-deliverability","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"domain":{"type":"string","description":"Sending domain to diagnose (e.g. stripe.com)"}}},"responseSchema":{"type":"json","example":{"args":{"domain":"example.com"},"pack":"email-deliverability","steps":[{"ok":true,"slug":"spf-check","result":{}},{"ok":true,"slug":"dmarc-check","result":{}},{"ok":true,"slug":"dkim-lookup","result":{}},{"ok":true,"slug":"email-deliverability","result":{}},{"ok":true,"slug":"email-validate","result":{}},{"ok":true,"slug":"dns-lookup","result":{}}],"summary":"6/6 steps succeeded"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.009","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":"$0.009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_RB4yJqjb21EeWsf7eK2rn","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.009","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Diagnoses why a domain's email lands in spam by checking SPF posture, DMARC policy, DKIM key strength, MX targets, and returning a composite 0–100 deliverability score.","exampleAgentPrompt":"Can you diagnose why emails from acmecorp.com might be landing in spam — check the SPF, DMARC, DKIM, and MX setup and give me an overall deliverability score?","exampleUseCases":null,"resultDescription":"Returns a structured report covering SPF posture, DMARC policy details, DKIM key strength, MX record targets, and a composite 0–100 deliverability score — all from a single bundled execution of 6 underlying email diagnostics tools.","failureModes":["Invalid or non-existent domain returns an error or empty DNS results","Domain with no DNS records returns null/missing fields for SPF, DMARC, DKIM","Private or internal domains unreachable via public DNS may return no results","Rate limiting or payment failure may block the call","Partial results if some DNS records are missing but others are present"],"whenToPreferThis":"Use this endpoint when you need a comprehensive, one-call email deliverability audit covering all major authentication and routing signals (SPF, DMARC, DKIM, MX) plus a composite score — rather than calling individual DNS lookup tools separately. Ideal for agents diagnosing spam delivery issues or auditing email infrastructure for any domain.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:05:50.922Z","isFirstParty":false}