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The Extended API is a set of low-latency edge utilities that complement the Main API. Use it for high-volume operations where round-trip latency matters: email address validation, DNS lookups for domain setup, SMS dispatch, and AI text scoring.

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Base URL

https://app.spotzee.com/api/ext

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Authentication

All requests require a bearer token. The same API keys used for the Main API are accepted here. See Authentication. 
Authorization: Bearer YOUR_API_KEY

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Capabilities

GroupWhat it does
Email healthValidate addresses, detect role accounts, check domain reputation
DNSLook up SPF, DKIM, DMARC, MX records — used by domain-setup wizards
SMSDispatch SMS messages and check delivery
AI text toolsScore, classify, and generate content snippets
Customer dataRead-only lookups for enriched customer records
QuotaInspect remaining credits on metered operations

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When to use Extended over Main

Use Extended API for…Use Main API for…
Per-request validation in a signup formCRUD on contacts, segments, journeys
Domain-setup wizards in your own UITriggering campaigns and journeys
High-volume scoring at the edgeReading reporting and analytics data
Quota and credit lookupsManaging organisation and project state

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Versioning

The current version is v1. The OpenAPI specification is published at: 
https://app.spotzee.com/api/ext/openapi.json
Interactive Swagger UI is available at https://app.spotzee.com/api/ext/docs.

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Rate limits

Per-API-key rate limits apply. Quota-metered endpoints (validation, scoring) deduct credits on success — check Quota endpoints before high-volume runs.

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Errors

See the Extended API errors reference.

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Next

Authentication

API keys and scopes.

Errors

Status codes and error bodies.