HubSpot Timeline
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For Agents
Define timeline event templates and emit events into HubSpot CRM record timelines so an agent can surface app activity (e.g., a webinar registration or a feature usage event) on the right contact, company, deal, or ticket.
Use for: I need to define a timeline event template for webinar registrations, Add a custom token (e.g., webinar_title) to an existing event template, Create a single timeline event on a contact when they register for a webinar, Bulk-emit timeline events for a list of contacts after a campaign
Not supported: Does not handle CRM record CRUD, automation workflows, or marketing email activity ingestion - use for app-emitted custom timeline events and their templates only.
The HubSpot CRM Timeline API lets a public app create custom timeline events that appear on the timeline of CRM records - contacts, companies, tickets, and deals. Apps first define event templates that describe the event type, header, detail, and tokens (event-specific fields), then emit individual events that bind values to those tokens. The API supports template management (create, list, get, update, delete event templates), token management on a template, single and batch event creation, and rendering of an event's header and detail as HTML for display inside HubSpot.
Install Jentic One Beta
Connect the Timeline to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Timeline, 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.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fhubspot.com%2Fhubspot-crm-timeline" | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fhubspot.com%2Fhubspot-crm-timeline" | 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 Timeline API.
Create a new event template for an app via POST /integrators/timeline/v3/{appId}/event-templates
List the event templates configured for an app with GET /integrators/timeline/v3/{appId}/event-templates
Add or update a token on an event template via PUT /integrators/timeline/v3/{appId}/event-templates/{eventTemplateId}/tokens/{tokenName}
Emit a single timeline event using POST /integrators/timeline/v3/events
Emit many events in one call with POST /integrators/timeline/v3/events/batch/create
Read a previously created event via GET /integrators/timeline/v3/events/{eventTemplateId}/{eventId}
Render a timeline event's header or detail as HTML using GET /integrators/timeline/v3/events/{eventTemplateId}/{eventId}/render
Use Cases
Patterns agents use Timeline API for, with concrete tasks.
★ Surfacing App Activity on CRM Records
Public apps that want their activity visible to HubSpot users define timeline event templates (e.g., 'Webinar Registered') and emit events that show up on the relevant contact's timeline. POST /integrators/timeline/v3/events accepts the event template ID, the object email or ID it should attach to, the timestamp, and the token values that fill out the header and detail. Sales reps then see the activity in context without leaving HubSpot.
Call POST /integrators/timeline/v3/events with eventTemplateId, email (the contact identifier), tokens={webinar_title:'Q3 Demo', registered_at:'2026-06-01T10:00Z'}, and timestamp.
App Onboarding: Defining Event Templates
When a public app first installs in a HubSpot portal it provisions its event templates so future events have somewhere to land. POST /integrators/timeline/v3/{appId}/event-templates creates the template with a name, headerTemplate, detailTemplate, and supported objectType. Tokens are then added via PUT /integrators/timeline/v3/{appId}/event-templates/{eventTemplateId}/tokens/{tokenName}, defining the typed fields the template expects.
Call POST /integrators/timeline/v3/{appId}/event-templates with name='Webinar Registered', objectType='contacts', headerTemplate, and detailTemplate, then add tokens via PUT for each token.
Bulk Event Backfill After Campaign
After a webinar or marketing event, an integration backfills HubSpot with timeline events for every registrant so reps can see who attended which session. POST /integrators/timeline/v3/events/batch/create accepts a list of events in one request, each with its own template, object, and tokens. This avoids per-event rate limit pressure and keeps the timeline up to date in seconds.
Call POST /integrators/timeline/v3/events/batch/create with one input per registrant containing eventTemplateId, email, tokens, and timestamp.
AI Agent Logging Activity to HubSpot
An AI agent that performs work on behalf of a HubSpot customer (e.g., generates a proposal, runs a check, kicks off a workflow) logs a record of its action to the relevant contact or deal timeline so users have full audit visibility. Through Jentic the agent searches for timeline event creation, loads the schema, and emits an event with templated tokens. Jentic stores OAuth credentials in its vault so the agent only handles scoped tokens.
Search Jentic for 'create hubspot timeline event for contact', load POST /integrators/timeline/v3/events, and emit an event with the relevant eventTemplateId and token values.
Key Endpoints
13 endpoints — the hubspot crm timeline api lets a public app create custom timeline events that appear on the timeline of crm records - contacts, companies, tickets, and deals.
METHOD
PATH
DESCRIPTION
POST
/integrators/timeline/v3/events
Create a single timeline event
POST
/integrators/timeline/v3/events/batch/create
Batch create timeline events
GET
/integrators/timeline/v3/events/{eventTemplateId}/{eventId}
Read a timeline event
GET
/integrators/timeline/v3/events/{eventTemplateId}/{eventId}/render
Render an event's header or detail as HTML
POST
/integrators/timeline/v3/{appId}/event-templates
Create an event template for the app
GET
/integrators/timeline/v3/{appId}/event-templates
List the app's event templates
PUT
/integrators/timeline/v3/{appId}/event-templates/{eventTemplateId}/tokens/{tokenName}
Add or update a token on a template
POST
/integrators/timeline/v3/events
Create a single timeline event
POST
/integrators/timeline/v3/events/batch/create
Batch create timeline events
GET
/integrators/timeline/v3/events/{eventTemplateId}/{eventId}
Read a timeline event
GET
/integrators/timeline/v3/events/{eventTemplateId}/{eventId}/render
Render an event's header or detail as HTML
POST
/integrators/timeline/v3/{appId}/event-templates
Create an event template for the app
GET
/integrators/timeline/v3/{appId}/event-templates
List the app's event templates
PUT
/integrators/timeline/v3/{appId}/event-templates/{eventTemplateId}/tokens/{tokenName}
Add or update a token on a template
Why Jentic?
What agents get from Jentic-routed access to this vendor.
Setup
Wiring HubSpot Timeline by hand means learning its OAuth2 access token, private app token, or developer hapikey auth, targeting the api.hubapi.com host, and shaping event and template payloads yourself. Through Jentic you install once, import HubSpot Timeline from the API Directory, store the credential once, and your agent calls it.
Permission scoping
The Timeline API puts the app id and event template id in the URL path (/integrators/timeline/v3/{appId}/event-templates/{eventTemplateId}), so a rule can pin your agent to one app's templates for reads and edits. You choose the operations it may call, so emitting events or creating templates are not included unless you add them.
Credential isolation
Your HubSpot access token, private app token, or developer hapikey is stored once, encrypted, by your own Jentic One instance and injected at execution time. It never enters the agent's prompt, logs, or context.
Intent-based discovery
Agents search Jentic by intent such as 'create a HubSpot timeline event' or 'render a timeline event', and Jentic returns the matching Timeline operation with its input schema so the agent emits events without browsing the reference docs.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using Timeline API through Jentic.
What authentication does the HubSpot Timeline API use?
It supports OAuth 2.0, HubSpot private app access tokens, and the legacy developer hapikey for app-scoped operations. The Authorization header carries the Bearer token. Through Jentic credentials are stored encrypted in the vault and injected at execution time so the agent never holds the raw secret.
Can I emit a timeline event for a contact identified by email?
Yes. POST /integrators/timeline/v3/events accepts an email field that resolves to the contact, alongside objectId for direct ID-based binding. Provide one of the two - email is convenient when you only know the user's address.
What are the rate limits for the HubSpot Timeline API?
HubSpot enforces 100 requests per 10 seconds for OAuth apps and 190 per 10 seconds for private apps on Enterprise tiers, plus daily quotas. Use POST /integrators/timeline/v3/events/batch/create to keep ingestion well under the limit during high-volume backfills.
How do I create a new event template through Jentic?
Search Jentic for 'create hubspot timeline event template', load POST /integrators/timeline/v3/{appId}/event-templates, and execute it with name, objectType, headerTemplate, and detailTemplate. Add tokens afterwards via PUT on the tokens path.
Can I render the HTML for a timeline event programmatically?
Yes. GET /integrators/timeline/v3/events/{eventTemplateId}/{eventId}/render returns the rendered HTML for the event header or detail (controlled by a query parameter), useful for previewing how the event will look in HubSpot's UI.
What objects can a timeline event attach to?
An event template declares its supported objectType - typically contacts, companies, deals, or tickets - and emitted events attach to a specific record of that type. To support multiple object types you create one event template per object type.
Can I limit what my agent is allowed to do with the HubSpot CRM Timeline API?
Yes. Because you run Jentic One yourself, your own rules decide which Timeline operations the agent may call and which credential it uses. Since the app id and event template id sit in the URL path (/integrators/timeline/v3/{appId}/event-templates/{eventTemplateId}), you can pin the agent to a single app's templates and choose whether it may only read and render events or also emit events and create templates. Operations like POST /integrators/timeline/v3/events or creating an event template are excluded unless you explicitly allow them.
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