Zoho Sign APIConnect Zoho Sign without building on its API
Zoho Sign has a REST API. Paid plan required: the Enterprise edition or the API-only plan, where sending documents through the API uses prepaid Zoho Sign credits (5 per envelope); a 14-day trial and 50 free test documents per month are available. If you're reading the docs because you need Zoho Sign to talk to the rest of your stack, Caddi does that without you writing or maintaining integration code: you show it the job once, and it runs it across Zoho Sign and your other tools.
- APIREST (JSON)
- AuthOAuth 2.0
- AccessPlan-dependent
What the Zoho Sign API gives you
- Type
- REST (JSON)
- Authentication
- OAuth 2.0
- Who can get access
- Paid plan required: the Enterprise edition or the API-only plan, where sending documents through the API uses prepaid Zoho Sign credits (5 per envelope); a 14-day trial and 50 free test documents per month are available.
- What it covers
- Signature requests (envelopes), documents, templates, bulk send, fields, users and account settings.
- Limits
- Most calls are capped at 50 per minute (template export 2 per minute, template import 1 per minute), with up to 25 recipients and 40 documents per request.
Official docs: zoho.com. Checked September 2026. Vendors change access terms, so confirm with Zoho Sign before you build.
Building on the Zoho Sign API vs. having Caddi run it
| The job | Build it on the API | With Caddi |
|---|---|---|
| Getting access | Register an app, get Zoho Sign credentials, and manage tokens and refreshes. | Connect your Zoho Sign account once. Caddi holds the connection. |
| Writing the integration | A developer maps fields, handles pagination, retries and rate limits, and writes the sync. | You show Caddi the Zoho Sign task the way you'd train a new hire. It writes verified code for it. |
| Steps the API doesn't cover | Screens with no endpoint stay manual, or need a separate RPA tool. | Caddi uses a secure, audited browser session where there's no API, in the same automation. |
| The other systems in the loop | Each extra tool is another API, another set of credentials, another integration to own. | One automation runs across all the tools the job touches. |
| Keeping it running | Someone owns the code when the API version, fields or your process change. | Every automation is reviewed before it runs in production, and every run is logged. |
Building on the API is the right call when you have engineers and the integration is your product. When the goal is getting Zoho Sign work off someone's desk, the build is the slow part.
What teams usually want the Zoho Sign API for
Send for signature
Caddi sends the contract through Zoho Sign and logs the request to Salesforce.
File signed contract
Caddi saves the signed Zoho Sign document to the right folder in Google Drive.
Notify on completion
Caddi posts the right Zoho Sign completion update to the channel.
Zoho Sign API questions
Does Zoho Sign have an API?
Yes. Zoho Sign has a REST API, authenticated with OAuth 2.0. The official documentation is at https://www.zoho.com/sign/api/.
How do I get access to the Zoho Sign API?
Paid plan required: the Enterprise edition or the API-only plan, where sending documents through the API uses prepaid Zoho Sign credits (5 per envelope); a 14-day trial and 50 free test documents per month are available.
Does the Zoho Sign API have rate limits?
Most calls are capped at 50 per minute (template export 2 per minute, template import 1 per minute), with up to 25 recipients and 40 documents per request.
Can I connect Zoho Sign to my other tools without writing code against its API?
Yes. With Caddi you show the Zoho Sign task once, the way you'd train a new hire, and Caddi builds it as verified code that runs across Zoho Sign and the other tools the job touches. Where a step has no API, Caddi uses a secure, audited browser session in the same automation.
Do I need a developer to automate Zoho Sign with Caddi?
No. There is no integration code for you to write or maintain. Every automation Caddi builds for Zoho Sign is reviewed before it runs in production, and every run is logged.
Connect Zoho Sign without the build.
Drop your work email and pick a time. We'll show you Caddi running your Zoho Sign workflow end to end.