Insightly REST API v3.1

REST API for managing contacts, organizations, leads, opportunities, projects, tasks, events, products, price books, quotes, and custom objects in Insightly. Uses HTTP Basic authentication with a Base64-encoded API key as the username and an empty password, against a pod-specific host.

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/rest-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑
aid: insightly:rest-api
name: Insightly REST API v3.1
description: REST API for managing contacts, organizations, leads, opportunities, projects, tasks, events,
  products, price books, quotes, and custom objects in Insightly. Uses HTTP Basic authentication with
  a Base64-encoded API key as the username and an empty password, against a pod-specific host.
humanURL: https://api.insightly.com/v3.1/Help
baseURL: https://api.{pod}.insightly.com/v3.1
tags:
- CRM
- Contacts
- Leads
- Opportunities
- Project
tags_raw:
- CRM
- Contacts
- Leads
- Opportunities
- Projects
properties:
- type: Documentation
  url: https://api.insightly.com/v3.1/Help