Official vendor OpenAPI document · agent-readyCRMContact Managementoauth211 EndpointsREST
For Agents
Create, update, search, and link HubSpot note records to contacts, companies, deals, and tickets, including batch operations.
Use for: I need to log a note on a contact summarising the call we just had, I want to sync notes from Gong into HubSpot timelines, Search for notes mentioning 'pricing concern' across all deals, List every note attached to a specific company
Not supported: Does not handle email threads, call recordings, or task creation - use for HubSpot CRM note engagement records only.
The HubSpot CRM Notes API manages the note engagement object that captures free-text annotations on contacts, companies, deals, and tickets in HubSpot. It supports single-record CRUD, batch read, batch create, batch update, batch upsert, batch archive, and search across note properties and associations. Use it to log AI-generated meeting summaries, sync notes from a sales engagement tool, or surface annotation history on a contact timeline.
Install Jentic One Beta
Connect the Notes to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Notes, 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-notes" | 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-notes" | 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 Notes API.
Create individual or batched note records and associate them with one or more CRM records
Search notes by body content, owner, creation date, or associated record
Update note body or attachments with single PATCH or batch update calls
Archive notes that are obsolete or were created in error
Upsert notes by an external system identifier to keep HubSpot in sync with a source-of-truth annotation store
Use Cases
Patterns agents use Notes API for, with concrete tasks.
★ Log AI-Generated Meeting Summaries
After a call or meeting, an AI summarisation pipeline can post the summary as a HubSpot note linked to the contact and deal so reps see the recap on the timeline without leaving the CRM. The note creation endpoint accepts an associations array, and rich-text bodies render natively in the HubSpot UI.
POST /crm/v3/objects/notes with hs_note_body containing the meeting summary text and an associations array linking the note to the contact and deal IDs.
Sync Notes from a Sales Engagement Platform
Mirror notes captured in a dialer, email tool, or revenue-intelligence platform into HubSpot so the CRM remains the unified record of conversations. Batch upsert keyed by an external note ID handles both create and update in one call, which suits a sync that runs every few minutes off platform webhooks.
POST /crm/v3/objects/notes/batch/upsert with up to 100 note records keyed by external_note_id and associations to the corresponding contact records.
Agent-Driven Note Search and Triage
An AI agent inside a sales-ops copilot can search across notes for keywords (objections, blockers, named competitors) to surface accounts that need attention. Through Jentic, the agent finds the note search operation by intent and runs filterGroups against hs_note_body, returning the matching deals or contacts for downstream action.
POST /crm/v3/objects/notes/search with filterGroups for hs_note_body CONTAINS_TOKEN 'pricing', sorted by created date descending, returning the top 50 with associated contact and deal IDs.
Key Endpoints
11 endpoints — the hubspot crm notes api manages the note engagement object that captures free-text annotations on contacts, companies, deals, and tickets in hubspot.
METHOD
PATH
DESCRIPTION
POST
/crm/v3/objects/notes
Create a note
GET
/crm/v3/objects/notes
List notes
GET
/crm/v3/objects/notes/{noteId}
Read a specific note
PATCH
/crm/v3/objects/notes/{noteId}
Update a note
POST
/crm/v3/objects/notes/search
Search notes by property filters
POST
/crm/v3/objects/notes/batch/upsert
Upsert notes by unique property
POST
/crm/v3/objects/notes
Create a note
GET
/crm/v3/objects/notes
List notes
GET
/crm/v3/objects/notes/{noteId}
Read a specific note
PATCH
/crm/v3/objects/notes/{noteId}
Update a note
POST
/crm/v3/objects/notes/search
Search notes by property filters
POST
/crm/v3/objects/notes/batch/upsert
Upsert notes by unique property
Jentic AI Readiness Score
This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use.
N
Notes
- Foundational (D-)41/100
74
Foundational Compliance63
Developer Experience & Jentic Compatibility17
AI-Readiness & Agent Experience94
Agent Usability70
Security63
AI DiscoverabilityPowered by JenticScoring Framework 1.0.0 | Scoring Engine 0.4.0
Show dimension breakdown
74
Foundational Compliance
Base layer of spec validity and structural soundness.
Grade: A-Signals: 4
94%
Lint Results
Aggregated quality score from linter diagnostics, weighted by severity.
100%
Resolution Completeness
Percentage of `$ref` references that resolve successfully.
0%
Specification Validity
Checks whether the API description parses successfully and conforms to its declared specification (e.g., OpenAPI).
100%
Structural Integrity
Structural correctness score based on schema issues using logarithmic dampening.
63
Developer Experience & Jentic Compatibility
Clarity, completeness, and ingestion readiness for developers and tooling.
Grade: BSignals: 4
8%
Example Density
How richly the API is illustrated with examples.
95%
Example Validity
Percentage of examples that conform to their schemas.
50%
Response Coverage
Percentage of operations with complete response definitions (success, client error, server error).
100%
Tooling Readiness
Health of API ingestion, bundling, and resolution within Jentic pipelines.
17
AI-Readiness & Agent Experience
Semantic breadth, depth, and agent comprehension for AI systems.
Grade: FSignals: 4
17%
Description Coverage
Coverage of descriptions across API elements.
0%
Error Standardization
Coverage of RFC 9457 Problem Details for error responses.
0%
OperationId Quality
Coverage, uniqueness, and casing consistency of operationIds for AI inference.
53%
Summary Coverage
Coverage of summaries across operations/tags/info.
94
Agent Usability
Functional utility, complexity comfort, and AI orchestration readiness.
Grade: A+Signals: 1
94%
Complexity Comfort
Agent comfort level based on API operational and structural complexity.
70
Security
Trust, risk posture, and security compliance.
Grade: A-Signals: 1
70%
Authentication Strength
Average quality of security schemes based on authentication method strength (weakest link for OAuth2).
63
AI Discoverability
Findability, semantic richness, and reasoning readiness.
Grade: B-Signals: 1
62%
Descriptive Richness
Clarity and depth of descriptions across API elements.
Score it yourself
Every API in the directory is allowlisted, so you can re-score it with no key required.
npx @jentic/api-scorecard-cli score <openapi-url>Why Jentic?
What agents get from Jentic-routed access to this vendor.
Setup
Wiring HubSpot Notes by hand means implementing its OAuth2 authorization-code flow (or managing a private-app token), posting engagement records to api.hubapi.com with the right note body and associations, and handling token refresh yourself. Through Jentic you install once, import HubSpot Notes from the API Directory, store the token once, and your agent calls it.
Permission scoping
This API works against the notes object collection, with the note id in the URL path (/crm/v3/objects/notes/{noteId}) on reads and updates. Limit the agent to the operations it needs, such as creating and searching notes, so an update or batch upsert path is not included unless you add it.
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 'create a HubSpot note' or 'search notes on a contact', and Jentic returns the matching note operation with its input schema, including the associations array shape, 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 Notes API through Jentic.
What authentication does the HubSpot Notes API use?
OAuth 2.0 Bearer tokens or HubSpot Private App tokens in the Authorization header. Jentic stores the token encrypted in the vault and provides the agent with a scoped reference, never the raw token.
Can I attach a note to multiple records in one call?
Yes. POST /crm/v3/objects/notes accepts an associations array on the request body so a note can link to a contact, the contact's company, and a related deal in a single request.
What are the rate limits for the HubSpot Notes API?
Standard HubSpot quotas apply: 100 requests per 10 seconds for OAuth apps and 110 for Private Apps, with daily caps that vary by Hub tier. Batch endpoints accept up to 100 records per call and count as one request, which is the right pattern for high-volume note ingestion.
How do I post an AI-generated meeting summary as a note through Jentic?
Run pip install jentic, call client.search('create a HubSpot note on a contact'), client.load to get the schema for POST /crm/v3/objects/notes, and client.execute with hs_note_body containing the summary text and an associations array linking the contact and deal IDs.
Can I search notes by their text content?
Yes. POST /crm/v3/objects/notes/search supports filters on hs_note_body using operators such as CONTAINS_TOKEN, which is how you find notes mentioning specific keywords across the portal.
Does this API support attachments on notes?
Yes. The hs_attachment_ids property on a note holds a comma-separated list of file IDs from the HubSpot Files API. Set the property at create or update time to attach files to the note.
Can I limit what my agent is allowed to do with the HubSpot Notes API?
Yes. Jentic One is self-hosted, so you run it and your own rules decide which note operations and credentials the agent can use. You can allow just the operations it needs, such as creating notes with POST /crm/v3/objects/notes and searching them with POST /crm/v3/objects/notes/search, while withholding update paths like PATCH /crm/v3/objects/notes/{noteId} or batch upsert. The agent can only call the operations you have granted, and your stored HubSpot token is injected at execution time rather than exposed to the agent.
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