{"uid":"cap_q6oBFD2y9_YgHpPaR4nOI","slug":"polyform-email-sender-trust-ac3d9b42","name":"Polyform Email Sender Trust","description":"Pay-per-call data endpoints for AI agents. USDC on Base via x402. No account, no API key — one micropayment per call.","url":"https://api.polyform.org/v1/email/sender-trust?utm_source=zero.xyz","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":{"type":"json","example":{"domain":"example.com","verdict":"REVIEW","riskScore":35}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/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_c7RMVmFzBkdeFs-KjrrWX","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":"Returns a trust verdict and risk score for an email sender's domain to help assess spam or phishing risk","exampleAgentPrompt":"Can you check the sender trust score for the domain 'newsletter.acme.com' — I want to know whether it's safe or high risk before I process these incoming emails?","exampleUseCases":[{"title":"Pre-screening inbound email pipeline","prompt":"Before my agent processes any inbound emails, check the sender trust for 'marketing.deals4u.biz' — I need to know if the verdict is safe or if I should flag it for review."},{"title":"Phishing alert triage for security team","prompt":"We got an email from 'support.paypa1-secure.com' — can you look up the sender trust and risk score so I can decide whether to escalate this as a phishing attempt?"},{"title":"Vendor onboarding email validation","prompt":"A new vendor is contacting us from 'invoices.globaltrade-partners.net' — can you pull the email sender trust verdict and risk score for that domain so I know whether to whitelist them?"}],"resultDescription":"Returns a JSON object containing the sender's domain, a verdict string (e.g. 'REVIEW', 'SAFE', 'BLOCK'), and a numeric risk score (0–100) indicating the likelihood of spam or malicious activity.","failureModes":["Missing or invalid domain in query params returns an error","Unknown or very new domain may return low-confidence or neutral verdict","Network timeout if domain reputation lookup takes too long","Payment failure via x402 prevents the call from completing","Malformed GET request returns 400 error"],"whenToPreferThis":"Use this endpoint when you need a lightweight, pay-per-call email sender reputation check with no account setup required. Ideal for AI agents that process inbound emails and need to triage sender trustworthiness on demand using USDC micropayments via x402 on Base. Prefer this over subscription-based email reputation APIs when call volume is low or unpredictable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T00:43:21.196Z","isFirstParty":false,"canonicalSlug":"polyform-email-sender-trust-ac3d9b42"}