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OpenAPI Specification

openapi: 3.2.0
info:
  title: Cold Leads Follow Ups API
  version: 1.0.0
  description: 'Headless e-mail verification and B2B e-mail discovery, plus the sales memory an AI agent needs to continue work across sessions: one-call lead context, a next-actions queue, follow-up scheduling and an audit log of API/MCP calls. Each operation declares x-coldleads-side-effect (read or write); nothing here sends e-mail. Authenticate with an API key from Settings → API keys (Business plan). Node.js SDK: https://github.com/anttka4cz/coldleads-node-sdk · MCP server: https://github.com/anttka4cz/mcp-server-coldleads'
servers:
- url: https://coldleads.app/api/v1
security:
- apiKey: []
tags:
- name: Follow Ups
paths:
  /follow-ups:
    post:
      operationId: scheduleFollowUp
      summary: Set, move or clear a contact's next action (no credits, never sends e-mail)…
      x-coldleads-side-effect: write
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                contact_id:
                  type: string
                email:
                  type: string
                  format: email
                due_at:
                  type: string
                  format: date-time
                  description: Within a year
                in_days:
                  type: integer
                  minimum: 0
                  maximum: 365
                  description: Alternative to due_at; 09:00 UTC
                note:
                  type: string
                  maxLength: 300
                clear:
                  type: boolean
                  description: true removes the follow-up
      responses:
        '200':
          description: contact_id, next_action_due, note
        '400':
          description: lead_required | invalid_arguments
        '404':
          description: not_found
      tags:
      - Follow Ups
components:
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: x-api-key
externalDocs:
  description: Node.js SDK (GitHub)
  url: https://github.com/anttka4cz/coldleads-node-sdk