HubSpot Postal Mail
Browse all Hubspot APIs✓ Official Vendor SpecCRMContact Managementoauth2,apiKey11 EndpointsREST
For Agents
Log, read, update, archive, and search HubSpot postal mail engagement records so direct mail activity sits alongside emails and calls in the CRM.
Use for: I need to log a direct mail send against a contact, Find all postal mail engagements sent in a campaign, Get the postal mail record for a specific ID, Bulk import postal mail sends from a print partner CSV
Not supported: Does not print, mail, or fulfil physical letters - use for logging postal mail engagement records into HubSpot CRM only.
The HubSpot Postal Mail API treats postal mail engagements - direct mail letters, postcards, packages - as first-class CRM records that can be logged against contacts, companies, and deals. It supports the standard CRM object pattern: read, list, patch, and archive single records, plus batch read, create, update, and archive of up to 100 records per call, and a search endpoint with filter groups and sort. Use it to log direct mail sends from a print partner back into the CRM, build outreach reports that combine digital and offline channels, and trigger follow-up sequences once a piece of postal mail is delivered.
Install Jentic One Beta
Connect the Postal Mail to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Postal Mail, 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-postal-mail" | 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-postal-mail" | 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 Postal Mail API.
Log a postal mail engagement on a contact or company record
Read a single postal mail record by ID with property selection
List postal mail engagements with cursor-based pagination
Search postal mail by date sent, status, or campaign property
Batch create up to 100 postal mail records from a print partner export
Update or archive postal mail records when a send is cancelled or reissued
Use Cases
Patterns agents use Postal Mail API for, with concrete tasks.
★ Direct mail engagement logging
Capture every direct mail piece a print partner sends so it shows up alongside email and call engagements on the contact timeline. Use POST /crm/v3/objects/postal_mail/batch/create to push batches of postal mail engagements with associations to the recipient contacts, then PATCH each record once a delivery confirmation arrives.
POST 100 postal mail records to /crm/v3/objects/postal_mail/batch/create with hs_postal_mail_subject and hs_timestamp set, plus contact associations.
Multi-channel outreach reporting
Build a report that combines digital and offline outreach by listing postal mail engagements alongside emails, calls, and meetings. POST /crm/v3/objects/postal_mail/search with date filters returns the postal mail subset; combine with the other engagement APIs for a unified channel view.
POST a search to /crm/v3/objects/postal_mail/search filtering hs_timestamp greater than the start of the quarter, sorted ascending.
Cancelled-send cleanup
Archive postal mail records when a print run is cancelled or reissued so the timeline only reflects pieces that actually went out. POST /crm/v3/objects/postal_mail/batch/archive removes up to 100 records in a single call.
POST /crm/v3/objects/postal_mail/batch/archive with the IDs of 50 cancelled mail records.
AI agent execution through Jentic
An agent that needs to log postal mail engagements discovers this API via Jentic's intent search using a query like 'log direct mail in hubspot', loads the input schema for the chosen operation, and executes the call with credentials supplied from your Jentic One instance. The same flow handles batch create, search, and patch.
Search Jentic for 'log direct mail in hubspot', load POST /crm/v3/objects/postal_mail/batch/create, and execute with one postal mail record.
Key Endpoints
11 endpoints — the hubspot postal mail api treats postal mail engagements - direct mail letters, postcards, packages - as first-class crm records that can be logged against contacts, companies, and deals.
METHOD
PATH
DESCRIPTION
GET
/crm/v3/objects/postal_mail/{postalMailId}
Read a single postal mail record by ID
PATCH
/crm/v3/objects/postal_mail/{postalMailId}
Update a postal mail record's properties
DELETE
/crm/v3/objects/postal_mail/{postalMailId}
Archive a postal mail record
GET
/crm/v3/objects/postal_mail
List postal mail records with pagination
POST
/crm/v3/objects/postal_mail/batch/create
Create up to 100 postal mail records in one call
POST
/crm/v3/objects/postal_mail/batch/read
Read up to 100 postal mail records by ID
POST
/crm/v3/objects/postal_mail/batch/update
Update up to 100 postal mail records in one call
POST
/crm/v3/objects/postal_mail/batch/archive
Archive up to 100 postal mail records in one call
GET
/crm/v3/objects/postal_mail/{postalMailId}
Read a single postal mail record by ID
PATCH
/crm/v3/objects/postal_mail/{postalMailId}
Update a postal mail record's properties
DELETE
/crm/v3/objects/postal_mail/{postalMailId}
Archive a postal mail record
GET
/crm/v3/objects/postal_mail
List postal mail records with pagination
POST
/crm/v3/objects/postal_mail/batch/create
Create up to 100 postal mail records in one call
POST
/crm/v3/objects/postal_mail/batch/read
Read up to 100 postal mail records by ID
POST
/crm/v3/objects/postal_mail/batch/update
Update up to 100 postal mail records in one call
POST
/crm/v3/objects/postal_mail/batch/archive
Archive up to 100 postal mail records in one call
Why Jentic?
What agents get from Jentic-routed access to this vendor.
Setup
Wiring Postal Mail by hand means implementing HubSpot's OAuth2 authorization-code flow (or managing a private-app header token), posting engagement records to api.hubapi.com with the right properties and associations, and handling token refresh yourself. Through Jentic you install once, import Postal Mail from the API Directory, store the token once, and your agent calls it.
Permission scoping
This API works against the postal_mail object collection, with the record id in the URL path (/crm/v3/objects/postal_mail/{postalMailId}) on reads, updates, and deletes. Limit the agent to the operations it needs, such as logging and reading postal mail records, so destructive paths like delete or batch archive are not included unless you add them.
Credential isolation
Your HubSpot 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 'log direct mail in HubSpot' or 'search postal mail by date', and Jentic returns the matching Postal Mail operation with its input schema, including the association payload structure, so the agent calls the right endpoint without browsing the reference docs.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using Postal Mail API through Jentic.
What authentication does the HubSpot Postal Mail API use?
It accepts OAuth 2.0 access tokens and private app access tokens passed as a Bearer credential in the Authorization header. Through Jentic, the token is stored encrypted in the credential vault and attached at execution time.
Can I associate a postal mail engagement with a contact and a deal?
Yes. Pass associations in the create payload referencing both the contact ID and the deal ID, and HubSpot will link the postal mail record to both. The same record will appear on each associated record's timeline.
What are the rate limits for the HubSpot Postal Mail API?
It shares HubSpot's account-level rate limits, typically 100 requests per 10 seconds for OAuth apps. Use POST /crm/v3/objects/postal_mail/batch/create to ingest up to 100 records per request when importing from a print partner.
How do I bulk-import postal mail through Jentic?
Search Jentic with 'batch create postal mail hubspot', load POST /crm/v3/objects/postal_mail/batch/create, and execute with up to 100 records per call. The response returns each record's id and properties for downstream association.
Is the HubSpot Postal Mail API free?
It is included with HubSpot accounts that have CRM access enabled; there is no per-call charge for the endpoints. Standard account-level rate limits apply.
How do I update the delivery status on a postal mail record?
PATCH /crm/v3/objects/postal_mail/{postalMailId} with a properties object containing the status field your portal uses (for example a custom hs_postal_mail_status property). Other properties on the record remain untouched.
Can I limit what my agent is allowed to do with the HubSpot Postal Mail API?
Yes. Because you run Jentic One yourself, your own rules decide which postal mail operations and credentials the agent may use. You can allow it to log and read records through POST /crm/v3/objects/postal_mail/batch/create and GET /crm/v3/objects/postal_mail/{postalMailId} while withholding destructive paths such as DELETE and POST /crm/v3/objects/postal_mail/batch/archive. Only the operations you grant are exposed to the agent, and the HubSpot token stays with your instance and attaches at execution time.
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