HubSpot Contacts

Name: Contacts API
Brand: HubSpot Contacts
Availability: InStock

✓ Official Vendor SpecCRMContact Managementoauth2,apiKey9 EndpointsREST

Install Jentic One Beta

Connect the Contacts to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Contacts, 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.

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 | sh

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 instance

Jentic 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 Contacts API.

Create contact records with email, firstname, lastname, and custom property values

Batch update contacts in groups of up to 100 records by ID

Merge two contact records into a single canonical record using the merge endpoint

GET STARTED

Start building with Contacts API

Explore with Jentic

View OpenAPI Document

For Agents

Create, read, update, archive, merge, and GDPR-delete HubSpot contact records, with batch endpoints suitable for high-volume CRM sync.

Use for: I need to create a new contact record in HubSpot, Retrieve a contact by its CRM object ID, Update the lifecycle stage on an existing contact, Merge two duplicate contact records into one

Not supported: Does not handle marketing email sends, deal pipeline, or tickets - use only for HubSpot CRM contact records.

Use Cases

Patterns agents use Contacts API for, with concrete tasks.

★ Lead Capture Sync

Sync newly captured leads from a marketing form or webinar platform into HubSpot as contact records. Batch create handles up to 100 contacts per request, and properties can include UTM parameters and the original lead source for attribution reporting.

POST 100 contact payloads to /crm/v3/objects/contacts/batch/create with email, firstname, lastname, and lead_source properties from the form export.

Duplicate Cleanup

When two contact records exist for the same person, merge them into a single canonical record using the merge endpoint. The merge preserves associations and activity history from both records and is non-reversible, so a dry-run pass usually precedes the merge job.

POST /crm/v3/objects/contacts/merge with primaryObjectId and objectIdToMerge to consolidate duplicate contacts into one record.

GDPR Right-to-be-Forgotten

When a contact requests deletion under GDPR, use the gdpr-delete endpoint to permanently remove the contact record and prevent recreation from synced sources. This is distinct from archive, which is reversible - gdpr-delete is the irreversible compliance action.

POST /crm/v3/objects/contacts/gdpr-delete with the contact email or id to permanently remove the contact record from HubSpot.

AI Agent Lead Routing

An AI agent reads new contacts hourly, classifies them by ICP fit using their company domain and title, and updates the lifecycle stage and owner accordingly. Jentic exposes the read and update operations with typed schemas, so the agent routes leads without consulting docs.

Read new contacts from the last hour via /crm/v3/objects/contacts, classify each, and PATCH /crm/v3/objects/contacts/{contactId} with lifecyclestage and hubspot_owner_id.

Key Endpoints

9 endpoints — the hubspot contacts api manages contact records - the primary crm object representing the people a hubspot user does business with.

METHOD

PATH

DESCRIPTION

POST

/crm/v3/objects/contacts/batch/create

Create contact records in batch

POST

/crm/v3/objects/contacts/batch/read

Read contacts in batch by ID

POST

/crm/v3/objects/contacts/batch/update

Update contact properties in batch

POST

/crm/v3/objects/contacts/batch/archive

Archive contacts in batch

POST

/crm/v3/objects/contacts/merge

Merge two contact records into one

POST

/crm/v3/objects/contacts/gdpr-delete

Permanently delete a contact for GDPR compliance

GET

/crm/v3/objects/contacts/{contactId}

Retrieve a single contact

GET

/crm/v3/objects/contacts

List contacts with pagination

POST

/crm/v3/objects/contacts/batch/create

Create contact records in batch

POST

/crm/v3/objects/contacts/batch/read

Read contacts in batch by ID

POST

/crm/v3/objects/contacts/batch/update

Update contact properties in batch

POST

/crm/v3/objects/contacts/batch/archive

Archive contacts in batch

POST

/crm/v3/objects/contacts/merge

Merge two contact records into one

Why Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

Your HubSpot OAuth token or private app token 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 contact' or 'read a contact by id', and Jentic returns the matching contacts operation with its input schema so the agent calls the right endpoint without browsing the reference docs.

Time to first call

FAQs

Specific to using Contacts API through Jentic.

What authentication does the HubSpot Contacts API use?

It supports OAuth 2.0 (oauth2 and oauth2_legacy) and HubSpot private app tokens passed as bearer tokens. Through Jentic, tokens are stored encrypted in the vault and a scoped token is injected per request, so raw credentials never enter the agent context.

Can I merge duplicate contacts with the HubSpot Contacts API?

Yes - POST /crm/v3/objects/contacts/merge with primaryObjectId and objectIdToMerge in the request body. Associations and activity history from the merged record transfer to the primary record. The operation is not reversible.

What are the rate limits for the HubSpot Contacts API?

Standard CRM v3 limits apply - 100 requests per 10 seconds for OAuth apps and 110 per 10 seconds for private apps on Pro and Enterprise. Use /crm/v3/objects/contacts/batch/create or /batch/update (up to 100 records per call) when syncing large lead lists.

How do I GDPR-delete a contact through Jentic?

Run the Jentic search "gdpr delete hubspot contact" to find POST /crm/v3/objects/contacts/gdpr-delete, load the schema, and execute with the contact email or id. Jentic handles authentication. This is irreversible - confirm before running.

Is the HubSpot Contacts API free?

The Contacts API is included with any HubSpot account, including the free tier. There is no per-call HubSpot fee, but custom property limits and higher API throughput require a paid tier.

Can I associate a contact with a company and deal in one call?

Yes - pass an associations array on create, or use the CRM Associations API afterwards, to link a single contact to companies, deals, and tickets. The single-record GET supports an associations parameter to return linked IDs in one response.

Can I limit what my agent is allowed to do with the HubSpot Contacts API?

Yes. Because you run Jentic One yourself, your own rules decide which contact operations and credentials the agent may use, and HubSpot's per-object OAuth scopes let you grant only the access it needs. For example, you can allow reading and updating contact records while leaving destructive operations like merge, batch archive, and GDPR delete out of the allowed set. The agent can only call the operations you explicitly permit.

HubSpot Contacts

Connect the Contacts to your agent

Capabilities

Start building with Contacts API

Use Cases

Key Endpoints

Why Jentic?

Related APIs

FAQs