Analyze

Grade a full cold-email draft across 8 deliverability/effectiveness dimensions

Local rule-based analysis (subject line, personalization, value proposition, CTA, length, tone, research signals, spam triggers) with an optional AI pass layered on top, returning a 0-100 score, letter grade, per-check detail, and per-dimension metrics. This POST is side-effect-free and safe to retry with the same body. Content must be at least 20 characters. Not rate-limited.

post/api/v1/analyze/cold-email

Request

  • Base URL: https://firstsales.io
  • URL: https://firstsales.io/api/v1/analyze/cold-email
  • Auth: none required

Headers

Idempotency-Keystring

Optional retry key accepted for agent/client compatibility. This analysis operation is side-effect-free, so repeating the same body is safe even without server-side key storage.

Request body

contentstring required

Response

Cold email grade and analysis.

scorenumber required
grade'A' | 'B' | 'C' | 'D' | 'F' required
strengthsstring[] required
weaknessesstring[] required
improvementsstring[] required
source'ai+local' | 'local' required

Changes

No recorded changes to this operation across all 1 revision of this API.