Dropbox Sign APIConnect Dropbox Sign without building on its API
Dropbox Sign has a REST API. Free self-serve test mode for any developer; production use requires a paid API plan (Essentials, Standard, or Premium). If you're reading the docs because you need Dropbox 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 Dropbox Sign and your other tools.
- APIREST (JSON)
- AuthAPI key
- AccessPaid plan to go live
What the Dropbox Sign API gives you
- Type
- REST (JSON)
- Authentication
- API key (HTTP Basic) or OAuth 2.0
- Who can get access
- Free self-serve test mode for any developer; production use requires a paid API plan (Essentials, Standard, or Premium).
- What it covers
- Signature requests (including embedded and bulk send), templates, unclaimed drafts, accounts, teams, and files.
- Limits
- 100 requests per minute for standard endpoints, 25 per minute for higher-tier endpoints, and 10 per minute in test mode.
Official docs: developers.hellosign.com. Checked September 2026. Vendors change access terms, so confirm with Dropbox Sign before you build.
Building on the Dropbox Sign API vs. having Caddi run it
| The job | Build it on the API | With Caddi |
|---|---|---|
| Getting access | Register an app, get Dropbox Sign credentials, and manage tokens and refreshes. | Connect your Dropbox 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 Dropbox 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 Dropbox Sign work off someone's desk, the build is the slow part.
What teams usually want the Dropbox Sign API for
Envelope generation
Caddi pulls signer details from the CRM, populates the right template, and sends the Dropbox Sign envelope to the correct contacts.
Signed-doc filing
On signature, Caddi files the final PDF in Dropbox with the right metadata and updates the matching CRM record.
Reminder + chase
Caddi monitors outstanding envelopes and sends the firm's standard reminder to each signer on a cadence — logging touches in the CRM.
Dropbox Sign API questions
Does Dropbox Sign have an API?
Yes. Dropbox Sign has a REST API, authenticated with API key (HTTP Basic) or OAuth 2.0. The official documentation is at https://developers.hellosign.com/.
How do I get access to the Dropbox Sign API?
Free self-serve test mode for any developer; production use requires a paid API plan (Essentials, Standard, or Premium).
Does the Dropbox Sign API have rate limits?
100 requests per minute for standard endpoints, 25 per minute for higher-tier endpoints, and 10 per minute in test mode.
Can I connect Dropbox Sign to my other tools without writing code against its API?
Yes. With Caddi you show the Dropbox Sign task once, the way you'd train a new hire, and Caddi builds it as verified code that runs across Dropbox 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 Dropbox Sign with Caddi?
No. There is no integration code for you to write or maintain. Every automation Caddi builds for Dropbox Sign is reviewed before it runs in production, and every run is logged.
Connect Dropbox Sign without the build.
Drop your work email and pick a time. We'll show you Caddi running your Dropbox Sign workflow end to end.