API tool
Make REST calls to connect any external service
Call REST APIs from your workflows. GET, POST, PUT, DELETE with headers, auth, and dynamic variables. Connect systems that don't have native integrations—no per-call fees.
Popular solutions using API tool
Real-world automation scenarios
Sync to external system
When order placed, call a fulfillment or ERP API to create a record. Pass order ID, line items, shipping address.
Fetch and enrich data
Call a CRM or enrichment API to look up customer or company data. Use the response in Email, Data, or Filter.
Notify external service
Trigger an API when a form is submitted or approval is granted. POST JSON to your backend or third-party.
Chained API calls
First API returns an ID; use it in the next API call. Build multi-step integrations without code.
Scheduled API sync
Schedule a workflow to call an API daily or hourly. Pull data, transform, and store in Data or send via Email.
Retry on failure
Use Queue + Delay to retry failed API calls. Handle rate limits and transient errors.
Getting started with API tool
Add an API step
Configure method (GET, POST, etc.), URL, headers, and body. Use variables for dynamic values.
Set authentication
Add API key, Bearer token, or OAuth. Store credentials securely and reference in the step.
Use the response
Reference API response fields in later steps. Transform or Filter based on status and body.
Building is better together
Tools often used together:
Why choose MESA's API tool?
| MESA API | Zapier | Make | Custom code | |
|---|---|---|---|---|
| Included in price | ✓ | Per task | Per op | Build yourself |
| REST methods | ✓ | ✓ | ✓ | ✓ |
| Auth (OAuth, API key) | ✓ | ✓ | ✓ | Custom |
| No per-call fees | ✓ | Per task | Per op | Host costs |
| Response mapping | ✓ | ✓ | ✓ | Manual |
| Cost | FREE | Per task | Per op | Dev time |
Unlike other platforms, MESA's API tool is included free with every plan.
Common questions
What HTTP methods does the API tool support?
Can I use OAuth or API keys?
How do I map API responses to later steps?
Does the API tool support retries?
What's the difference between API and Webhook?
Where can I learn more?
Start using the MESA API tool today
Included free in all MESA plans
Need help connecting an API? Our team will help you design your first integration. Contact us →
