What is a Unified CRM API?

CRM platforms each store data differently, with their own authentication and schemas. A Unified CRM API standardizes these into one interface — operations like Create Record, Create Lead, Create Engagement work the same way no matter which platform is on the other end, while Knit manages translation, rate limiting, retries, and sync management underneath.

CRM API Operations

Every operation below is real and already live — not a roadmap item. Browse the full API reference →

Create Record

Add a new record under a custom object

Create Lead

Create a new lead record in the CRM

Create Engagement

Log a new engagement activity such as an email or call

Create Deal

Create a new deal in the CRM

Create CRM Contact

Create a new contact in the CRM

Create CRM Account

Create a new account in the connected CRM

CRM Contacts

Sync contact details like name, email, phone, and associated accounts

Add Tag

Assign a tag to a contact or account

Add field to a schema

Add a new field to an existing schema

CRM Accounts

Sync CRM account-level data including addresses, contacts, and phone numbers

Read All Schemas

List all custom object schemas available in the CRM

Read All Fields for a Schema

List all fields defined within a specific custom object

Leads

Sync lead data including contact info, lead source, and conversion status

Get Global Tags

Fetch all tags available for use across contacts and accounts

Get Candidate Tags

Fetch tags assigned to candidates or contacts

Get all Deal Stages

Retrieve a list of all deal stages configured in the CRM

Engagement

Sync engagement activities like emails, calls, or meetings related to contacts

Deals

Sync deal pipeline data including stages, accounts, and related contacts

Custom Objects Records

Sync records from custom CRM objects

Create Schema

Define a new custom object schema

Update Schema Details

Update metadata or field structure for a schema

Update Record

Update a specific record under a custom object

Update Lead

Update an existing lead with new information

update existing field

Update label, type, or config for a field in schema

Update Engagement

Update an engagement entry with new notes or outcomes

Update Deal

Update an existing deal with pipeline or status changes

Update CRM Contact

Update contact information in the CRM

Update CRM Account

Update account details such as name, status, or owner

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26 CRM apps you can integrate with today

Active Campaign

Active Campaign

Active Campaign integrates via Knit's Unified CRM API — live in days, not weeks.

Affinity CRM

Affinity CRM

Affinity CRM integrates via Knit's Unified CRM API — live in days, not weeks.

Attio

Attio

Enable Attio API integration via Knit's Unified CRM API — no per-platform maintenance.

Brevo

Brevo

Brevo integrates via Knit's Unified CRM API — one schema, one integration.

Capsule CRM

Capsule CRM

Power Capsule CRM API integration via Knit's Unified CRM API — no per-platform maintenance.

Clickup CRM

Clickup CRM

Clickup CRM integrates via Knit's Unified CRM API — live in days, not weeks.

Close CRM

Close CRM

Ship Close CRM API integration via Knit's Unified CRM API — no per-platform maintenance.

Copper CRM

Copper CRM

Copper CRM integrates via Knit's Unified CRM API — one schema, one integration.

Dynamics 365 CRM

Dynamics 365 CRM

Enable Dynamics 365 CRM API integration via Knit's Unified CRM API — live in days, not weeks.

Freshsales

Freshsales

Freshsales integrates via Knit's Unified CRM API — no per-platform maintenance.

Freshworks

Freshworks

Build Freshworks API integration via Knit's Unified CRM API — one schema, one integration.

GoHighLevel

GoHighLevel

GoHighLevel integrates via Knit's Unified CRM API — live in days, not weeks.

Hubspot

Hubspot

Enable Hubspot API integration via Knit's Unified CRM API — no per-platform maintenance.

Insightly CRM

Insightly CRM

Ship Insightly CRM API integration via Knit's Unified CRM API — one schema, one integration.

Lead Squared

Lead Squared

Add Lead Squared API integration via Knit's Unified CRM API — live in days, not weeks.

Monday CRM

Monday CRM

monday.com CRM integrates via Knit's Unified CRM API — live in days, not weeks.

Netsuite CRM

Netsuite CRM

Launch Netsuite CRM API integration via Knit's Unified CRM API — no per-platform maintenance.

Nutshell

Nutshell

Nutshell integrates via Knit's Unified CRM API — one schema, one integration.

Pipedrive

Pipedrive

Launch Pipedrive API integration via Knit's Unified CRM API — no per-platform maintenance.

Pipeline CRM

Pipeline CRM

Add Pipeline CRM API integration via Knit's Unified CRM API — no per-platform maintenance.

Salesflare CRM

Salesflare CRM

Salesflare CRM integrates via Knit's Unified CRM API — no per-platform maintenance.

Salesforce API

Salesforce API

Salesforce API integrates via Knit's Unified CRM API — one schema, one integration.

Sugar CRM

Sugar CRM

Build Sugar CRM API integration via Knit's Unified CRM API — live in days, not weeks.

Twenty

Twenty

Enable Twenty API integration via Knit's Unified CRM API — no per-platform maintenance.

Zendesk Sell

Zendesk Sell

Ship Zendesk Sell API integration via Knit's Unified CRM API — live in days, not weeks.

Zoho CRM

Zoho CRM

Zoho CRM integrates via Knit's Unified CRM API — no per-platform maintenance.

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Why Knit for CRM integrations

Extensive webhook support

Real-time sync without constant polling — get notified the moment CRM data changes.

Scalable infra

Sync thousands of CRM records in minutes, not hours.

Add a missing app in days

AI-powered connector building means a missing CRM platform isn't a months-long wait.

Unified CRM API vs. building it yourself

Building it yourself

  • A separate integration for every CRM platform you support
  • Different schema, auth, and pagination per platform
  • You build and maintain OAuth for each platform
  • Poll each API on your own schedule
  • Engineering effort grows with every new platform
  • Weeks to months per platform, per engineer

With Knit

  • One Unified CRM API covers every platform you support
  • One normalized schema across every platform
  • Embedded Auth handles OAuth, storage, and refresh for you
  • Extensive webhook support for real-time sync
  • Describe a missing app to the Integrations Agent and get it built instantly
  • Live in days, not months

Customer Stories

See how leading technology firms are scaling their operations

Amazing Product With Exceptional Support from the team. By using Knit we managed to speed up our development by orders of magnitude.
H
Huynh H
Developer, Multiplier
A brilliant tool to let you seamlessly integrate with many different systems. It is very easy to integrate with and customer support is next level.
J
Jayesh
Co-Founder, Scrut
Seamless integration experience. Well-documented, self-explanatory APIs, and excellent service and support.
P
Poorvi
Product Manager, Onsurity
Easy to integrate. Knit's dashboard is intuitive for setting up and testing integrations, and the sandbox is extremely useful during development.
A
Aditya
Product Lead, RazorpayXPayroll
Knit shipped a brand-new Timesheet API in a week and handed us a ready-to-use NetSuite sandbox. That velocity is priceless when you're running payroll in 40+ countries.
R
Rohit Singh
GM, Payoneer Workforce Management

#1 in Ease of Integrations

4.9 out of 5 stars

4.9 out of 5 stars on G2

G2 Leader, Spring 2026G2 Fastest Implementation, Spring 2026G2 High Performer, Spring 2026G2 Best Est. ROI, Spring 2026
FAQ

Common questions about the Unified CRM API

Which CRM systems does Knit support?

26 CRM platforms today — including Active Campaign, Affinity CRM, Attio and more. Missing one you need? Knit's AI-assisted connector-build process typically adds a new one within days.

Does the Unified CRM API support both reading and writing data?

Yes. It supports both reads and writes, so you can build bi-directional sync use cases — not just pull CRM data, but push updates back to the source app.

How does authentication work across CRM platforms?

Knit provides an embedded Auth component (white-labeling available on higher tiers) that handles OAuth, credential storage, and refresh — your customers authorize once through Knit, and you never touch raw credentials.

What is the timeline for adding a missing CRM connector?

Typically days, not months — the same AI-based connector-build tooling that lets us maintain the 26 CRM connectors already live.

Do you store CRM data or customer PII?

No. Knit acts as a stateless passthrough — data is processed on our application server and sent directly to your webhooks, without being stored on Knit's servers.

What is the pricing model, and is there a free trial?

You choose the model that fits your business — pricing based on integrated accounts, or based on API call volume. Every plan includes a 30-day free trial before billing starts.

See all FAQs

From the blog

Full list of Knit’s CRM API Guides

Full list of Knit’s CRM API Guides

This directory is a live list of all CRM API integration guides we have written at Knit. Use it to quickly find the guide related to the specific CRM APP you want to learn more about.

Zendesk CRM API Directory

Zendesk CRM API Directory

Zendesk CRM API integration guide covering key features, endpoints, use cases, FAQs, and best practices to automate customer data, sales pipelines, and support workflows at scale.‍

Zoho CRM API Directory

Zoho CRM API Directory

Zoho CRM API integration guide covering authentication, bulk read/write, COQL queries, composite requests, backups, and key endpoints. Includes practical highlights and FAQs for building reliable Zoho CRM integrations.

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