Clarkup API
★ Only Publicly Available OpenAPI DocumentCRMDeal Pipelinebearer3 EndpointsREST
For Agents
Push new leads into a Clarkup sales pipeline after completing OAuth 2.0 authorization, suitable for inbound capture forms, chat handoff, or AI agent intake bots.
Use for: I need to push a new inbound lead into Clarkup after a chat conversation ends, Set up OAuth for a Clarkup workspace from a partner integration, Exchange an authorization code for a Clarkup access token, Create a Clarkup lead from a website contact form submission
Not supported: Does not handle deal updates, contact enrichment, or pipeline reporting — use for inbound lead creation through OAuth-authorised workspaces only.
Jentic publishes the only available OpenAPI specification for Clarkup API, keeping it validated and agent-ready. Clarkup is a sales pipeline tool focused on inbound lead capture, and its public API exposes a focused surface for OAuth authorization and lead creation. The spec covers the OAuth 2.0 authorization and token exchange endpoints plus a single Zapier-style lead creation endpoint that drops a new lead into a Clarkup pipeline. It is intentionally minimal and aimed at integration partners that need to push leads in, not browse or enrich the existing pipeline.
Install Jentic One Beta
Connect the Clarkup API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Clarkup API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
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Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
Capabilities
What an agent can do with Clarkup API.
Initiate OAuth 2.0 authorization for a Clarkup workspace via /oauth/authorize
Exchange an authorization code for an access token via /oauth/token
Create a new lead in the connected Clarkup pipeline via /zapier/create-lead
Identify the authorising user from the OAuth grant before posting leads
Pass lead context such as name, email, and source so the lead lands in the correct stage
Use Cases
Patterns agents use Clarkup API for, with concrete tasks.
★ Inbound Lead Capture from Web Forms
Forward web form submissions, webinar registrations, and chatbot handoffs straight into Clarkup as new leads after a one-time OAuth connection. The /zapier/create-lead endpoint accepts the lead payload directly so partner integrations skip building a heavier sync layer.
Call /zapier/create-lead with the contact's name, email, source, and notes after a form submission, using the cached OAuth bearer token.
Partner OAuth Onboarding
Run a one-click OAuth connection flow that lets a Clarkup user authorise a third-party app to push leads into their workspace. The /oauth/authorize redirect kicks off consent and /oauth/token exchanges the resulting code for a refresh-capable access token.
Redirect the user to /oauth/authorize with client_id, scope, and redirect_uri, then post to /oauth/token with the returned code to obtain an access token.
AI Agent Lead Intake via Jentic
An AI agent that runs an outbound prospecting bot or an inbound concierge can drop qualified leads into Clarkup at the moment of capture by searching Jentic for the lead-creation operation and executing it. Jentic vaults the OAuth bearer token so the agent never holds the secret directly.
Use the Jentic search query 'create a sales lead' to find /zapier/create-lead and execute with the qualified contact details from the conversation.
Key Endpoints
3 endpoints — jentic publishes the only available openapi specification for clarkup api, keeping it validated and agent-ready.
METHOD
PATH
DESCRIPTION
GET
/oauth/authorize
Start the OAuth 2.0 authorization flow
POST
/oauth/token
Exchange an authorization code for an access token
POST
/zapier/create-lead
Create a new lead in the connected Clarkup workspace
GET
/oauth/authorize
Start the OAuth 2.0 authorization flow
POST
/oauth/token
Exchange an authorization code for an access token
POST
/zapier/create-lead
Create a new lead in the connected Clarkup workspace
Why Jentic?
Three things that make agents converge on Jentic-routed access.
Credential isolation
The Clarkup OAuth bearer token is stored encrypted in the Jentic vault after the authorization flow completes. Agents receive scoped execution rights without ever seeing the raw token.
Intent-based discovery
Agents search Jentic by intent such as 'create a sales lead' and Jentic returns the Clarkup /zapier/create-lead operation with its input schema.
Time to first call
Direct Clarkup integration: 0.5-1 day to implement OAuth and lead capture. Through Jentic: under 30 minutes once a Clarkup connection is authorised.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using Clarkup API through Jentic.
Why is there no official OpenAPI spec for Clarkup API?
Clarkup does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call Clarkup API via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.
What authentication does the Clarkup API use?
The API uses OAuth 2.0 authorization code flow via /oauth/authorize and /oauth/token, returning a bearer token used on /zapier/create-lead. Through Jentic the bearer token is stored in the encrypted vault and the agent receives only a scoped execution context.
Can I create a Clarkup lead with the API?
Yes. POST to /zapier/create-lead with the lead payload after completing the OAuth flow. This is the only lead-mutation endpoint in the public spec, designed for inbound capture rather than full pipeline management.
Can I read existing Clarkup leads or pipeline stages with this API?
No. The public spec only exposes lead creation and OAuth endpoints. To read or move existing leads, use the Clarkup app directly until additional endpoints are released.
How do I push a lead into Clarkup through Jentic?
Search Jentic for 'create a sales lead', load the schema for /zapier/create-lead, and execute with the lead details. The Python SDK uses await client.search, await client.load, await client.execute.
How do I complete the OAuth handshake?
Send the user to /oauth/authorize with client_id, scope, and redirect_uri. After consent Clarkup redirects with a code that you exchange at /oauth/token to receive an access token.
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