ChatSpark Developer Documentation

Build powerful AI chat integrations with the ChatSpark REST API and embed the Chat Widget on your website. Get started in minutes.

REST API

Server-side integrations for chat, agents, conversations, leads, analytics, training, and webhooks.

5 min to first call

Chat Widget

Embed a conversational AI widget on your website. Customize appearance, capture leads, and subscribe to events.

2 min to embed

What you can build

Customer Support Bot
Lead Capture Widget
Slack Integration
WhatsApp Agent
E-commerce Assistant
Booking Agent

Quick Start

Send your first chat message in seconds. Replace cs_live_... with your API key and {id} with your agent ID.

bash

curl -X POST https://chatspark.io/api/v1/agents/{id}/chat \
  -H "Authorization: Bearer cs_live_..." \
  -H "Content-Type: application/json" \
  -d '{"message":"Hello!"}'

Read the full Quick Start guide →

Plan & Rate Limits

API access and rate limits vary by plan. Upgrade to unlock more endpoints and higher throughput.

Plan	API Access	Endpoints	Rate Limit
Basic	No access	—	—
Plus	Chat, Conversations, Leads	Chat, List agents, Conversations, Leads	`60` req/min
Pro	Plus + Agents, Analytics	+ Agent CRUD, Analytics	`120` req/min
Enterprise	Full access	+ Training, Webhooks, Full CRUD	`300` req/min

Ready to integrate?

Follow our Quick Start guide to make your first API call in under 5 minutes.