{"uid":"cap_tSDrBGA035EYmxmoqsK8Q","slug":"spf-authorizes-customer-io-checker-7ebf3838","name":"SPF Authorizes Customer.io Checker","description":"Does the domain's SPF record authorise customerio to send its mail? Reads the SPF TXT record (Cloudflare DoH) and checks for customerio's include/ip mechanisms, returning yes/no, the matching mechanism and the full record. Confirms a vendor integration is wired for deliverability, or spots an unexpected sender. $0.01 per lookup.","url":"https://email.intel.rallylive.ca/email/spf-authorizes/customerio?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_OVMx3pWoPR4k-3714d_xI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a domain's SPF record authorizes Customer.io to send email on its behalf, returning yes/no, the matching mechanism, and the full SPF record.","exampleAgentPrompt":"Can you check whether the SPF record for acme.com authorizes Customer.io to send email on its behalf — I want to confirm our transactional email integration is wired up correctly before we go live.","exampleUseCases":[{"title":"Pre-launch deliverability audit","prompt":"We're about to launch our Customer.io campaigns for sendgrid.io — can you verify that our SPF record actually authorizes Customer.io to send mail so we don't end up in spam?"},{"title":"Unexpected sender investigation","prompt":"I'm seeing emails coming from our domain that we didn't send — can you check if the SPF record for mybrand.com includes Customer.io as an authorized sender?"},{"title":"Post-migration SPF validation","prompt":"We just migrated our transactional email stack to Customer.io for notifications.company.com — can you confirm that the SPF record is already set up to allow Customer.io to send on our behalf?"}],"resultDescription":"Returns a structured response indicating whether Customer.io is authorized as a sender in the domain's SPF record (yes/no), the specific SPF mechanism that matched (e.g. include:servers.cust-spf.com or a specific IP block), and the complete raw SPF TXT record retrieved via Cloudflare DNS-over-HTTPS.","failureModes":["Domain has no SPF TXT record — returns no authorization and empty record","Domain not found or DNS resolution failure via Cloudflare DoH","SPF record exists but contains no Customer.io-related mechanisms — returns not authorized","Malformed SPF record that cannot be parsed","Payment not received — x402 payment required error before lookup proceeds"],"whenToPreferThis":"Use this endpoint when you need to programmatically confirm that a specific domain's SPF record is correctly configured to authorize Customer.io as an email sender. Ideal for pre-deployment deliverability checks, post-configuration audits, or automated monitoring pipelines. Prefer this over general SPF parsers when the specific question is Customer.io authorization — it returns a direct yes/no answer rather than requiring you to parse and interpret SPF mechanisms yourself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T06:47:34.704Z","isFirstParty":false,"canonicalSlug":"spf-authorizes-customer-io-checker-7ebf3838"}