SaaS Stack & Email Provider Detector

x402

SaaS Stack & Email Provider Detector is a paid API for AI agents from agent-data.centorprat.workers.dev, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-29).

Identifies a company's email provider, security gateway, DMARC setup, SSO, and SaaS tools (Atlassian, Okta, Zoom, etc.) from its domain or work email using public DNS lookups.

Price / call$0.015

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call data and tools for AI agents, $0.002-0.01 per call in USDC via x402 (Base, Polygon or Solana), no account or API key; MAX tiers ($0.05-0.25) run deeper jobs. Agent toolkit: web search, search + read top pages, any page as clean markdown with a prompt-injection check, which-x402-API-to-call recommender, seller check. Data: Google Maps places with contacts, YouTube video data and transcripts, job listings (Indeed, LinkedIn, 13 boards), Google Ads Transparency, TikTok comments, Pinterest, Airbnb, Redfin, AliExpress, app stores, live sports, website and SEO checks, Shopify store tech stacks, and onchain token / address risk checks.

Output

Returns per-domain findings including: identified email provider (Microsoft 365, Google Workspace, or other), email security gateway, Microsoft tenant details, DMARC policy, email sending tools, SSO provider, and list of confirmed SaaS vendors (e.g. Atlassian, Okta, Zoom, OpenAI). Optionally includes vendor-hosted subdomains with their CNAME records. Free-mail addresses and failed lookups are not charged.

Example use cases

Email platform segmentation for sales outreach

“I need to know if hubspot.com and zendesk.com are on Microsoft 365 or Google Workspace — I'm segmenting my outreach and want to personalize my pitch based on their email platform.”

Prospect filtering by security stack

“Check whether salesforce.com and workday.com use Proofpoint or Mimecast as their email security gateway — I only want to reach out to companies using one of those two products.”

Competitor SaaS usage discovery

“Find out what SaaS tools notion.so is running — especially whether they use Okta for SSO and what email sending tools they have set up. Include any vendor-hosted subdomains you find.”

Technical details

Endpoint

POSThttps://agent-data.centorprat.workers.dev/tools/saas-stack-email-provider-detector?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need fast, DNS-based SaaS stack and email infrastructure discovery for B2B sales prospecting, lead qualification, or competitive research — without requiring any access to the target company's systems. Ideal for filtering leads by email platform or required vendor (e.g. 'only show me Okta customers') at $0.01 per call with up to 3 domains at once. Prefer this over full company enrichment APIs when you specifically need email provider, security gateway, or SaaS vendor signals derived from public DNS records.

Side effects

Domain has no public DNS records — lookup returns empty or skipped result
Free-mail addresses (gmail.com, outlook.com) are silently skipped at no charge
Exceeding 3 items per call returns a validation error
Unknown or private SaaS vendors may not be detected
DNS propagation delays may cause stale results for recently changed configurations
Some security gateways or SSO providers that don't leave DNS footprints won't be detected

Input

Schema · Request body

Field	Type	Description
emails	array	Lead or contact emails, e.g. ["jane@acme.com"]. The company domain is taken from each address; free-mail addresses (gmail.com, outlook.com, yahoo.com...) are skipped for free.
domains	array	Company domains or websites, e.g. ["stripe.com", "atlassian.com"].
emailProvider	string	microsoft = Microsoft 365 (incl. via GoDaddy), google = Google Workspace, other = neither, any = no filter.
excludeVendors	array	e.g. your own product, to keep only prospects.
requireVendors	array	e.g. ["Okta"], ["Proofpoint", "Mimecast"], ["HubSpot"], ["Greenhouse"]. Case-insensitive.
includeSubdomains	boolean	Return each vendor-hosted subdomain with its CNAME (help, status, careers, go, login, www...). Turn off for smaller rows.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "items": [
      {
        "dmarc": {
          "policy": "reject",
          "reportingVendor": null
        },
        "input": "stripe.com",
        "stack": {
          "ai": [
            "OpenAI (ChatGPT Enterprise / API)",
            "Anthropic (Claude for Work)"
          ],
          "web": [
            "Google (Search Console / Workspace)"
          ],
          "other": [
            "Apple (Business / Sign in with Apple)"
          ],
          "design": [
            "Canva"
          ],
          "hosting": [
            "Vercel",
            "Fastly"
          ],
          "support": [
            "Zendesk",
            "Intercom"
          ],
          "devTools": [
            "Postman"
          ],
          "payments": [
            "Stripe"
          ],
          "security": [
            "Bug bounty (HackerOne / Bugcrowd)"
          ],
          "analytics": [
            "Qualtrics"
          ],
          "eSignature": [
            "DocuSign"
          ],
          "advertising": [
            "Meta Business Manager"
          ],
          "emailSending": [
            "SendGrid (Twilio)",
            "Mailchimp Mandrill"
          ],
          "productivity": [
            "Google Workspace",
            "Microsoft 365"
          ],
          "collaboration": [
            "Whimsical",
            "Atlassian (Jira / Confluence)"
          ]
        },
        "domain": "stripe.com",
        "vendors": [
          {
            "name": "Meta Business Manager",
            "category": "advertising",
            "evidence": [
              "TXT facebook-domain-verification=m7id9rt8ehlgcg9tt2yggbsi6gro7i"
            ],
            "confidence": "high"
          },
          {
            "name": "Anthropic (Claude for Work)",
            "category": "ai",
            "evidence": [
              "TXT anthropic-domain-verification-zk7x9c=QfN52ECybLPUWh51R9pKF0Q"
            ],
            "confidence": "high"
          },
          {
            "name": "OpenAI (ChatGPT Enterprise / API)",
            "category": "ai",
            "evidence": [
              "TXT openai-domain-verification=dv-9tiBE20GDN0Td9lCfVtA3DwG"
            ],
            "confidence": "high"
          },
          {
            "name": "Qualtrics",
            "category": "analytics",
            "evidence": [
              "SPF include:_spf.qualtrics.com"
            ],
            "confidence": "high"
          },
          {
            "name": "Atlassian (Jira / Confluence)",
            "category": "collaboration",
            "evidence": [
              "TXT atlassian-domain-verification=upLp21qQgja1aHG2gnAb1AmXRqb/zG"
            ],
            "confidence": "high"
          },
          {
            "name": "Whimsical",
            "category": "collaboration",
            "evidence": [
              "TXT whimsical=253112f9add9790f3a27b9d9893626451fc4cda1"
            ],
            "confidence": "high"
          },
          {
            "name": "Canva",
            "category": "design",
            "evidence": [
              "TXT canva-site-verification=xLypn0D9XANRy-lbwcMfHA"
            ],
            "confidence": "high"
          },
          {
            "name": "Postman",
            "category": "devTools",
            "evidence": [
              "TXT postman-domain-verification=c3b168067b16085c452b04b643ae1000"
            ],
            "confidence": "high"
          },
          {
            "name": "DocuSign",
            "category": "eSignature",
            "evidence": [
              "TXT docusign=4c9f5602-1c19-4e4c-bde7-77dc4b9ea8a0",
              "TXT docusign=4a93db58-af07-4632-a881-b569d41a6c57"
            ],
            "confidence": "high"
          },
          {
            "name": "Mailchimp Mandrill",
            "category": "emailSending",
            "evidence": [
              "DKIM selector mandrill._domainkey"
            ],
            "confidence": "medium"
          },
          {
            "name": "SendGrid (Twilio)",
            "category": "emailSending",
            "evidence": [
              "DKIM s1._domainkey -> s1.domainkey.u2680008.wl009.sendgrid.net",
              "DKIM s2._domainkey -> s2.domainkey.u2680008.wl009.sendgrid.net"
            ],
            "confidence": "high"
          },
          {
            "name": "Fastly",
            "category": "hosting",
            "evidence": [
              "TXT fastly-domain-delegation-3c9tdnjzdwy7wfffvyyy-786084-2024-07"
            ],
            "confidence": "high"
          },
          {
            "name": "Vercel",
            "category": "hosting",
            "evidence": [
              "TXT vercel-domain-verification-0x8270=XezzJjJYrYZwY6CahDneh2ruB",
              "TXT vercel-domain-verification-d2ks5d=rkbS4OdBoLxPogGq2IhBN1OZV",
              "TXT vercel-domain-verification-n462w8=JRePwTQbccpon6VAqYhidisHw"
            ],
            "confidence": "high"
          },
          {
            "name": "Apple (Business / Sign in with Apple)",
            "category": "other",
            "evidence": [
              "TXT apple-domain-verification=8kIS0gmJTvILWQuI"
            ],
            "confidence": "high"
          },
          {
            "name": "Stripe",
            "category": "payments",
            "evidence": [
              "SPF include:spf1.stripe.com",
              "SPF include:greenhouse-outbound-mail.stripe.com",
              "TXT stripe-verification=82ce82470fb8324e19fa65abdb6fd370da5a8f90"
            ],
            "confidence": "high"
          },
          {
            "name": "Google Workspace",
            "category": "productivity",
            "evidence": [
              "MX alt1.aspmx.l.google.com",
              "MX alt2.aspmx.l.google.com",
              "MX aspmx.l.google.com"
            ],
            "confidence": "high"
          },
          {
            "name": "Microsoft 365",
            "category": "productivity",
            "evidence": [
              "TXT MS=ms80697640"
            ],
            "confidence": "high"
          },
          {
            "name": "Bug bounty (HackerOne / Bugcrowd)",
            "category": "security",
            "evidence": [
              "TXT h1-domain-verification=KhpNX9YNAc7bX95agGvFsPPKbYTVe1KC6xj7P"
            ],
            "confidence": "high"
          },
          {
            "name": "Intercom",
            "category": "support",
            "evidence": [
              "DKIM intercom._domainkey -> 1cfa01d9-a634-461b-80cd-cca1e261fd6f.dkim.intercom.io"
            ],
            "confidence": "high"
          },
          {
            "name": "Zendesk",
            "category": "support",
            "evidence": [
              "DKIM zendesk1._domainkey -> zendesk1._domainkey.zendesk.com",
              "DKIM zendesk2._domainkey -> zendesk2._domainkey.zendesk.com"
            ],
            "confidence": "high"
          },
          {
            "name": "Google (Search Console / Workspace)",
            "category": "web",
            "evidence": [
              "TXT google-site-verification=qjP3OAiraClha_40cX9Z9FrG5q3O_0InXSa",
              "TXT google-site-verification=ZgGi2-xDdfnaWxdfjn5AqtUS11jKWqSXAV_",
              "TXT google-site-verification=pmz8ueKvWMPxNlwUDcVroF91-tq6I9VM6wS"
            ],
            "confidence": "high"
          }
        ],
        "resolved": true,
        "subdomains": [
          {
            "cname": "stripe.com",
            "vendor": null,
            "subdomain": "www.stripe.com"
          },
          {
            "cname": "fe-nlb.stripe.com",
            "vendor": null,
            "subdomain": "mail.stripe.com"
          },
          {
            "cname": "prod-webhooks-flow.stripe.com",
            "vendor": null,
            "subdomain": "support.stripe.com"
          },
          {
            "cname": "fe-nlb.stripe.com",
            "vendor": null,
            "subdomain": "t.stripe.com"
          },
          {
            "cname": "fe-nlb.stripe.com",
            "vendor": null,
            "subdomain": "community.stripe.com"
          },
          {
            "cname": "fe-nlb.stripe.com",
            "vendor": null,
            "subdomain": "shop.stripe.com"
          },
          {
            "cname": "fe-nlb.stripe.com",
            "vendor": null,
            "subdomain": "blog.stripe.com"
          },
          {
            "cname": "prod-frontend-flow.stripe.com",
            "vendor": null,
            "subdomain": "auth.stripe.com"
          },
          {
            "cname": "b.stripecdn.com",
            "vendor": null,
            "subdomain": "trust.stripe.com"
          }
        ],
        "wildcardDns": false,
        "vendorsCount": 21,
        "dkimSelectors": [
          "google",
          "s1",
          "s2",
          "mandrill",
          "zendesk1",
          "zendesk2",
          "intercom",
          "cm",
          "m1"
        ],
        "emailProvider": "Google Workspace",
        "microsoftTenant": null,
        "verificationRecords": [
          "Anthropic (Claude for Work)",
          "Apple (Business / Sign in with Apple)",
          "Atlassian (Jira / Confluence)",
          "Bug bounty (HackerOne / Bugcrowd)",
          "Canva",
          "DocuSign",
          "Fastly",
          "Google (Search Console / Workspace)",
          "Meta Business Manager",
          "Microsoft 365",
          "OpenAI (ChatGPT Enterprise / API)",
          "Postman",
          "Stripe",
          "Vercel",
          "Whimsical"
        ],
        "emailSecurityGateway": null
      }
    ]
  }
}

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