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Example workflow
Call history record sync test
Object-specific availability and field permissions determine this mapping. Use the restrictions shown for each record type.
Starting eventA change involving HubSpot Calls or Twilio Calls needs a defined result in the other system.
01
Start with HubSpot Calls and Twilio Calls. Use the record-matching and field-ownership rules from your mapping worksheet.
02
Resolve participant and business-record identities, provider/account scope, and any related recording access.
03
Test a normal update and one failed or repeated update in the supported direction. Keep both record IDs with the test results.
What to verifyTest two calls to the same number, a corrected disposition, and a delayed call completion. Verify that the intended CRM activity is updated once.
Connect the Stacksync MCP server to your AI assistant, then ask for the sync in plain language. You only sign in; there is no code to write and no API key to paste.
1. Add the Stacksync MCP server
Server URL
https://mcp.stacksync.com/mcp
In Claude
Open Customize → Connectors, select + Add, then Add custom connector.
Name it Stacksync and enter https://mcp.stacksync.com/mcp.
Select Connect, sign in to Stacksync and choose your workspace.
In ChatGPT
Open Settings → Apps → Advanced settings and turn on Developer mode.
Select Create app, name it Stacksync, enter https://mcp.stacksync.com/mcp and choose OAuth.
Sign in to Stacksync, then enable Stacksync from the tools menu in a chat.
Twilio recordCallsDocumented record: Read: Supported. Write: Not available (read-only connector).
Record matchingRetain the source call ID, provider/account context, and the explicit relationship to a CRM activity. A phone number alone cannot identify one call.
Field ownershipKeep call history and disposition separate from actions that place a call or change routing; assign an owner for corrected activity details.
Use writable fields from the connected accounts. Read values from read-only fields without writing changes back to them, and define deletion handling separately.
Why teams connect HubSpot and Twilio
Put your HubSpot and Twilio data to work
Start with the work your team needs to complete: keep records up to date, make operational data available for reporting, or move data to a new system. Choose one HubSpot and Twilio workflow to test, define what success looks like, and decide who handles failed updates.
01
Push product signup and usage events into HubSpot contact properties to drive lifecycle marketing segmentation.
02
Write warehouse-computed lead and account scores back to HubSpot properties on a schedule or in near real time.
03
Trigger outbound messages by writing rows to a synced database table instead of calling the Twilio API directly from application code.
04
Sync delivery and error statuses back into the system that initiated the send, so failed messages surface where the campaign lives.
What records can you sync?
Start with the records your workflow needs. Check each system’s read and write requirements before mapping fields.
HubSpot
Read and write support varies by record
Record types covered in the setup guide
Record types
Coverage and requirements
Contact
Company
Deal
Line Item
Product
Ticket
Quote
Goal
Owner
Pipeline
Stages
Audit
Subscriptions
HubDB
Forms
Calls
Communications
Emails
Meetings
Notes
Post Mail
Tasks
Marketing Emails
Invoices
Attachments
Custom objects (all)
Associations
Users
Services
Listings
Courses
Appointments
Commerce Payments
Email Events
Property History
Supported. Confirm field permissions and sync direction.
Campaigns
Coming soon. Confirm field permissions and sync direction.
Feedback Submissions
Not supported. Confirm field permissions and sync direction.
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
SOC 2 Type II
ISO 27001
HIPAA BAA
GDPR
CCPA
DPF US-EU-UK-CH
SSO & SCIM
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Alerts
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
Review setup, record relationships, testing, and recovery for your implementation.
Authentication, permissions and API limits
Connection requirements and limits
HubSpot
Integration interface
REST API (CRM v3)
Authentication
OAuth (choose HubSpot account and authorize Stacksync); requires a HubSpot 'Super Admin' to grant access; optional "Grant access to sensitive fields" checkbox for sensitive/highly sensitive fields
Change detection
Record updates and association changes need separate validation. Association detection uses full scans unless Associations CDC Boost is configured for an eligible account.
Read access
Available for supported records
Write access
Available for supported records
Setup requirements
Have a HubSpot Super Admin authorize Stacksync through the account connection flow.
Include association tables when relationships between records are needed. Configure Associations CDC Boost separately when eligible.
Limitations to check
Custom objects require an eligible HubSpot plan. Custom id properties that collide with native record IDs are excluded from sync.
Associations CDC Boost requires setup and is unavailable on Free and Starter accounts; association timing can differ from ordinary records.
REST API (per-product APIs for Messaging, Voice, Conversations, Verify)
Authentication
Account SID + Auth Token (copied from Twilio Console Account Info and entered into the Stacksync Twilio connector)
Change detection
The saved Stacksync guide does not specify the change-detection mechanism. Confirm it for the selected objects.
Read access
Available for supported records
Write access
Not supported by this connector
Setup requirements
Copy the Account SID and Auth Token from the Twilio console into the Stacksync connection form.
Select the documented resources to read from Twilio into a supported destination; use a separate integration method if the workflow must send messages or make calls.
Limitations to check
The Stacksync connector is documented as read-only. It does not write changes back to Twilio.
Set up both accounts before testing the mapping. Use test records where available, and identify the account administrator who can approve access and help resolve setup errors.
HubSpot setup checklist
Have a HubSpot Super Admin authorize Stacksync through the account connection flow.
Include association tables when relationships between records are needed. Configure Associations CDC Boost separately when eligible.
Copy the Account SID and Auth Token from the Twilio console into the Stacksync connection form.
Select the documented resources to read from Twilio into a supported destination; use a separate integration method if the workflow must send messages or make calls.
Record the fields each system can update, the first-load cutoff, both record IDs, the expected update delay, and who handles errors. Complete the tests before production before expanding to more records.
Use HubSpot Calls and Twilio Calls for the first pilot. Verify its identity and permitted direction, then add dependent records only when the acceptance checks pass.
Stacksync managed sync
Best fit
Source-to-destination updates for supported objects. Choose the records, writable fields, and permissions for your workflow.
Operating responsibility
Fits ongoing record synchronization when the required operations are supported. Add workflow steps for approvals or business actions that go beyond copying fields.
Before you choose
Check record matching: Retain the source call ID, provider/account context, and the explicit relationship to a CRM activity. A phone number alone cannot identify one call. Verify field coverage, deletion handling, and how changes are detected.
Native vendor integration
Best fit
A vendor-built integration may fit if it supports your HubSpot and Twilio record types.
Operating responsibility
Can reduce setup for a supported workflow. You may need another method for records or business steps it does not cover.
Before you choose
First check whether either vendor offers this integration. If available, verify Calls / Calls, update direction, account tier, and related-record handling.
Custom API or workflow
Best fit
Consider when HubSpot and Twilio need a transformation, approval, or action outside a direct record sync.
Operating responsibility
Provides control over business steps; the team owns credentials, version changes, error queues, and reconciliation.
Before you choose
Verify endpoint permissions, pagination, quotas, duplicate detection, and failure recovery. Separate reading history from actions that send messages, grant access, or post transactions.
File or scheduled snapshot
Best fit
Consider for a one-time HubSpot / Twilio migration or a reporting need with an explicit freshness window.
Operating responsibility
Can simplify a bounded transfer; later changes and deletion history require another extraction or a separately designed incremental process.
Before you choose
Record the extraction cutoff, source IDs, encoding, date/number formats, and reconciliation totals.
Workflow scenarios and expected results
Call history record sync test
Object-specific availability and field permissions determine this mapping. Use the restrictions shown for each record type.
Starting event: A change to the selected Calls or Calls record needs a defined result in the other system.
Start with HubSpot Calls and Twilio Calls. Use the record-matching and field-ownership rules from your mapping worksheet.
Resolve participant and business-record identities, provider/account scope, and any related recording access.
Test a normal update and one failed or repeated update in the supported direction. Keep both record IDs with the test results.
Expected result: Test two calls to the same number, a corrected disposition, and a delayed call completion. Verify that the intended CRM activity is updated once.
If it fails: Look up the current call and destination activity before retrying; repairing history must not place another call or expose a restricted recording.
Link communication history with HubSpot context
Validate the selected objects and operations even where connector-level direction is documented.
Starting event: A communication in Twilio needs an association with Contact or Company in HubSpot.
Select the communication records from Messages or Calls and preserve message/call and thread IDs.
Resolve the participant-to-business-record relationship explicitly; phone number or display name alone may be ambiguous.
Keep history replication separate from sending a message, placing a call, or changing consent. Confirm a separate authorized operation for any action.
Expected result: Repeated delivery updates the same history record; a private conversation stays private; a history replay sends no new message.
If it fails: Check source delivery state and the destination relationship before retrying. Do not resend to repair an analytical or history discrepancy.
Initial load and acceptance testing
Keep both record IDs with the expected and actual result. Reconcile the same filters and time window in each system.
Calls / Calls
Test case
Test two calls to the same number, a corrected disposition, and a delayed call completion. Verify that the intended CRM activity is updated once.
Expected result
The expected call history record relationship is preserved with no duplicate action or unintended write.
Direction and permissions
Test case
Verify read access in Twilio and write access in HubSpot. Test the permitted route without relying on a return sync.
Expected result
Only an approved, supported direction and permitted fields are written.
Freshness and reconciliation
Test case
Measure source and destination times for the selected records under normal load and a burst. Reconcile IDs and values using the same filters and cutoff.
Expected result
The process meets its agreed freshness target and reconciliation has no unexplained differences.
Failed updates, retries and recovery
Start with the failed record and the destination error, then inspect the source value, field requirements, and access.
Rejected or repeated call history record change
Investigate
Inspect HubSpot Calls and Twilio Calls, their IDs, and the destination error.
Next action
Look up the current call and destination activity before retrying; repairing history must not place another call or expose a restricted recording.
A record type or update is unavailable
Investigate
Check the HubSpot and Twilio connector guides, account permissions, and any operations marked On Request.
Next action
Ask the integration team to confirm a supported way to handle that record. Verify whether it needs connector configuration or a separate workflow step.
Source and destination disagree after a retry
Investigate
Compare current source values, destination validation, identity mappings, and any side effects already completed.
Next action
Stacksync issue retry reads the current source state. Decide the intended state before retrying or reverting; reconcile downstream effects separately.
See how each system detects changes and which updates the other system can receive.
Each direction has its own permissions and record requirements.
HubSpot → Twilio Direction not supported
Detect changesThis route requires read access from HubSpot and write access to Twilio; the documented connector restrictions do not permit it.
Apply updatesUse a supported direction or review a separate integration method for this requirement.
Twilio → HubSpot Timing depends on the connected systems
Detect changesThe saved Stacksync guide does not specify the change-detection mechanism. Confirm it for the selected objects.
Apply updatesSelected writable fields update in HubSpot. Its permissions and validation rules still apply; rejected records can be inspected in the Issues dashboard.
Update timing and record limits
Measure initial-load and ongoing-change latency separately. Source detection, selected objects, account limits, and destination validation determine the observed delay.
Associations CDC Boost requires setup and is unavailable on Free and Starter accounts; association timing can differ from ordinary records.
FAQ
HubSpot and Twilio integration FAQ
The documented direction is Twilio to HubSpot for supported objects. Twilio is documented as a read-only connector, so it cannot receive write-back through this connector. Authorize both systems, map the selected fields, and validate the first load and later changes.
Twilio is read-only through Stacksync. Two-way sync is not supported through these connectors; use a supported direction or review another implementation.
Prepare both accounts, the selected object schemas, stable source and destination IDs, and the expected outcome. Have a HubSpot Super Admin authorize Stacksync through the account connection flow. Copy the Account SID and Auth Token from the Twilio console into the Stacksync connection form. Use the pair worksheet to record ownership and acceptance criteria.
Measure initial-load and ongoing-change latency separately. Source detection, selected objects, account limits, and destination validation determine the observed delay.
No. Stacksync documents that pre-existing duplicates are not merged automatically when two-way sync begins. Review the initial dataset and matching plan before enabling it; an empty destination can simplify the first load.
Start with one business entity and a stable record ID. Map a small set of editable fields with compatible types, test required values and relationships, then expand after the pilot passes.
Check the destination error, field constraints, permissions, and current source value. The Stacksync issues dashboard supports retry and revert; retry reads current source values, so verify the intended record state before acting.
Use the current Stacksync pricing page and confirm the supported implementation with the team. Scope the required objects, record volume, update frequency, initial load, and support needs when comparing a managed connector with native or custom development.
Start by reviewing Calls in HubSpot and Calls in Twilio. Check how these records relate in your workflow, then confirm the actual fields and supported operations. Test record matching and one failed or repeated update before adding more records.
Use HubSpot Calls and Twilio Calls for the first pilot. Verify its identity and permitted direction, then add dependent records only when the acceptance checks pass.