Learn how to securely authenticate the Contacts API connection using OAuth 2.0 scopes and API keys. We cover token lifecycles, refresh cadence, and best practices for keeping credentials safe.
This section explains how BulkSMS-com authorizes access to your Contacts API data, including how to supply client credentials, manage scopes, and rotate secrets to maintain security.
GET /contacts/:contactId — Retrieve a single contact GET /contacts/:contactId/tasks — List a contact’s tasks GET /contacts/:contactId/tasks/:taskId — Get a specific task GET /contacts/:contactId/notes — List notes for a contact GET /contacts/:contactId/notes/:id — Get a note GET /contacts/:contactId/appointments — List appointments GET /contacts/ — List all contacts GET /contacts/business/:businessId — List or fetch by business API Endpoint9: contacts.write — Write permission hint API Endpoint10: POST /contacts/ — Create a contact API Endpoint11: PUT /contacts/:contactId — Update a contact API Endpoint12: DELETE /contacts/:contactId — Delete a contact API Endpoint13: POST /contacts/:contactId/tasks — Create a task API Endpoint14: PUT /contacts/:contactId/tasks/:taskId — Update a task API Endpoint15: PUT /contacts/:contactId/tasks/:taskId/completed — Mark task completed API Endpoint16: DELETE /contacts/:contactId/tasks/:taskId — Delete a task API Endpoint17: POST /contacts/:contactId/tags — Add tags to a contact
Trigger: a contact is created or updated in the Contacts API. BulkSMS-com receives the change and updates messaging records in real time.
Actions: create or update the corresponding contact in BulkSMS-com, map phone numbers and preferred channels, and trigger SMS campaigns or notifications.
Example paths: GET /contacts/:contactId to fetch; POST /contacts/ to create; PUT /contacts/:contactId to update.
Key fields: contactId, phone, name, email, tags, custom fields
Trigger: a new message event or status change in BulkSMS-com prompts an update to the contact in GHL.
Actions: update contact notes, tasks, or statuses in the Contacts API based on messaging events.
Example calls: POST /contacts/:contactId/tasks to create a task; PUT /contacts/:contactId/tasks/:taskId to update.
Key fields: contactId, taskId, status, messageId
Trigger: periodic reconciliation to align data across both systems.
Actions: merge duplicates, unify field mappings, and ensure consistent lifecycle events across platforms.
Example: GET /contacts/ to pull lists; POST /contacts/ to create; PUT /contacts/:contactId to update.
Key fields: contactId, externalId, email, phone
Automate messaging workflows without writing code, using pre-built triggers and actions.
Centralize contact data for highly personalized SMS campaigns and accurate audience segmentation.
Scale outreach quickly with reliable data synchronization and ready-to-use automation templates.
This section introduces core elements such as contacts, tasks, notes, and tags, and explains the authentication, endpoint usage, and data synchronization processes.
Application Programming Interface: a defined set of rules that allows software components to communicate and share data safely.
A callback mechanism where one system notifies another of events in real time via HTTP requests.
The process of verifying that an app or user has permission to access the requested resources.
A specific URL path exposed by an API to perform a function or retrieve data.
Configure a trigger on contact creation to send a welcome or onboarding SMS automatically, increasing initial engagement.
Use contact status changes to schedule targeted reminders or check-ins via SMS, improving conversion rates.
Aggregate new or updated contacts into a daily SMS digest for teams that need rapid visibility into changes.
In BulkSMS-com, generate API credentials and note the client ID and secret. Store securely and configure redirect URIs if required.
Select the needed endpoints and assign appropriate scopes (for example, contacts.readonly for reads and contacts.write for writes). Test connectivity in a sandbox environment.
Run test requests, verify data fidelity, monitor logs, and refine field mappings and retry strategies for reliability.
Yes, bidirectional syncing is possible when both systems are configured to listen for relevant events. Enable webhooks for contact updates in GHL and set corresponding triggers in BulkSMS-com to push or pull data as needed. Implement conflict resolution rules to prevent duplicates during sync. Keep in mind that not all endpoints support all operations; map the fields carefully and test thoroughly to ensure data integrity.
Read-only access typically uses the contacts.readonly scope. For updates, you’ll need write scopes such as contacts.write. Always apply the principle of least privilege and restrict scopes to only what your workflow requires. Rotate credentials regularly and monitor usage for anomalies.
Yes. You can create and update contacts from BulkSMS-com using POST and PUT endpoints, respectively. Ensure that essential fields such as name, phone, and email are properly mapped to the Contacts API fields. Use idempotent operations where possible to prevent duplicates.
Authenticate using OAuth 2.0 or API keys, depending on your configuration. Store credentials securely, rotate them periodically, and implement token refresh logic. Use server-to-server communications where feasible to enhance security.
Rate limits depend on your plan and endpoints in use. Plan for bursts by implementing exponential backoff and retries with sensible backoff times. Monitor quota usage in the developer console to avoid interruptions.
Validate payloads via signature checks and verify webhook sources. Use idempotent requests and maintain proper logging of received events. Securely store webhook URLs and restrict access to trusted IPs where possible.
Endpoint documentation is available in the developer portal under the Contacts API reference. If you need a sandbox environment or additional examples, contact support to enable access.
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