API Documentation & Integrations

Complete REST API documentation for WarmySender. Build custom integrations with our email warmup, campaign, and LinkedIn automation APIs.

Authentication

All API requests require a Bearer token in the Authorization header. Generate API keys from Settings > API Keys in your WarmySender dashboard. Keys are scoped to your workspace and support granular permissions.

Authorization: Bearer your-api-key-here

Base URL

All API endpoints are available at:

https://warmysender.com/api/v1

Rate Limiting

API requests are limited to 60 requests per minute per workspace. Rate limit headers are included in all responses:

API Endpoints

Prospects

Campaigns

Mailboxes

Warmup

Suppressions

Webhooks

WarmySender sends real-time webhook notifications for key events. Configure webhooks from Settings → Webhooks or via the API. Each delivery is signed with HMAC-SHA256 (X-Warmy-Signature) and retried up to 10 times with exponential backoff (1 min → 72 h) until your endpoint returns a 2xx.

Event types

Native Slack integration (no middleware)

Paste a Slack Incoming Webhook URL (https://hooks.slack.com/services/…) into Settings → Webhooks and we auto-format each event as a Block Kit message. LinkedIn reply notifications include the reply body, prospect name, profile URL, and campaign — rendered as a readable Slack card. No Zapier, Make, or n8n required in the middle. Rate limits are honored automatically via the Retry-After header on HTTP 429.

n8n, Zapier, Make integration

Create an HTTP Trigger (Webhook) node in n8n (or a Webhook trigger in Zapier / Make), copy its Production URL, and paste it into Settings → Webhooks. You receive the full JSON payload and can fan out to any downstream system — Slack, Discord, Teams, HubSpot, Pipedrive, Airtable, Google Sheets, Notion, or a custom database — with conditional logic and transformations between steps. Signature verification via X-Warmy-Signature is recommended when your endpoint is publicly reachable.

Popular Integrations

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