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klerc

API & Integrations

Nearly 1,000 apps, one API.

Connect the tools your team already uses — calendars, payments, accounting, e-signature, drives and more — from a catalogue of nearly 1,000 apps powered by Composio; connected accounts power the inbox and your agents' tools. And everything in the interface is an API: one action registry behind the UI, Molly and a token-authed REST API.

apps via Composio
~1,000
API actions
165
feature areas
19
query dialects over HTTP
3
Connecting an account to the inbox: Gmail, Outlook and Zoho Mail for email, and Slack, Instagram, Facebook, X and YouTube — the connected ones marked.

Integrations

Nearly 1,000 apps, two clicks each

The catalogue spans email, communication, CRM & sales, payments, AI & productivity and developer tools — Google Calendar, Calendly, Zoom, Stripe, Razorpay, QuickBooks, Xero, Tally, DocuSign, Google Drive, Slack, Microsoft Teams and hundreds more. Connected accounts power the inbox and your agents' tools.

  • Email, communication, CRM & sales, payments, AI & productivity, developer
  • Managed OAuth with encrypted token storage
  • Status, per-account settings and disconnect in one place

REST API

Everything the UI does, over REST

Create and update records on any object, run SOQL from code, and call the same feature actions the UI uses — send a broadcast, create a task, move a pipeline stage. Plain REST with JSON at /api/v1, discoverable through the generated spec.

  • An OpenAPI spec at /api/v1/openapi.json
  • Cursor pagination and consistent envelopes
  • SOQL, SOSL and SAQL over HTTP

Tokens & scopes

Scoped tokens that respect reality

Tokens are hashed at rest and scoped as feature × action — objects:use, tasks:use, inbox:send. A token can never do more than your account is allowed to: its scopes intersect with your live permissions, so revoking a person's access revokes their integrations too.

  • sha256-hashed tokens with a wk_ prefix
  • A scope picker per token
  • A Molly token provisioned per user

Realtime & jobs

Sockets and queues where they belong

Presence, live co-editing and inbox updates ride WebSockets; heavy work — sends, ingestion, scheduled workflow runs — runs on background queues with retries and sweepers. Voice and video run on an SFU with credentials minted per session.

  • Socket namespaces for the app and public clients
  • Queued jobs with retry and pollers
  • Doc and sheet collaboration with total-order sequencing

Also in the box

Action registry

One catalogue of every action — the UI, Molly and the API all call through it.

Discoverable

listActions, describeAction, performAction — integrations can find capabilities.

Consistent envelopes

Uniform success and error shapes with status and data keys.

Rate limits

Sensible defaults: auth 20 per 15 minutes, API 600 per minute per IP.

Webhook ingest

Idempotent inbound processing for messaging events.

Public clients

Forms and chat widgets embed anywhere, behind origin allow-lists.

Put your agents to work.

Bring your team, connect your channels and let klerc take the follow-ups — from first hello to paid invoice.

Free during early access. No credit card needed.