Resources

Limit type	Limit
PDF format of a signable Document	Any PDF version
PDF format of an already signed Document that you want to sign again	PDF 1.6 and above
PDF format of an Attachment	Any PDF version
Size of one uploaded Document	50 MB
Documents per Signature Request	50
Signers per Signature Request	100 (5 in Sandbox during the API trial)
Approvers per Signature Request	10 (5 in Sandbox during the API trial)
Followers per Signature Request	100 (5 in Sandbox during the API trial)
Fields per Signature Request	500
Document formats accepted in the Signature Request	PDF, docx
Signer Document Requests per Signature Request	10
Size of Signer Document Requests files	25 MB
Labels per Signature Request	50
Number of pages for a document including at least one Smart Anchor	150 pages Be careful, the more Smart Anchors you have in a document, the more time your request will take.
The default validity of a `signature_link`	48 hours However, this duration can be modified (minimum 1 hour and maximum 72 hours) by making a request to the support.
Electronic seal fields per seal	200
Electronic seal image size	500 KB
Electronic seal document size	50 MB
Electronic seal images	50
Workflow Session: Number of Actions in an Action Group	10

Rate limit

A rate limit policy covers all the endpoints of the API.

The sandbox and production environments have different rate limit.

Environment	Requests/min	Requests/hour
Sandbox	30 requests/min	200 requests/hour
Production	60 requests/min	1200 requests/hour

📘
An additional daily limit of 100 Signature Requests applies in the Sandbox environment during the API trial period.

Your remaining calls quotas are sent in all the API responses through X-Ratelimit-Limit-Remaining-Minute and X-Ratelimit-Limit-Remaining-Hour HTTP headers :

HTTP/2 429 
< x-ratelimit-limit-hour: 1200
< x-ratelimit-limit-minute: 60
< x-ratelimit-remaining-hour: 1197
< x-ratelimit-remaining-minute: 59

If one of your calls is rejected because a rate limit threshold is hit, you will receive the status code 429 and "too many requests" as explanation.

ℹ️
The rate limit policy can be customised to fit your needs
If your implementation respects our standards (mainly use Webhooks instead of regular polling), you can request a change in your Rate-limit.
Please fill out this form.
Our support team will review your request and work with you to find the best solution.
Please keep in mind that:

It may take few days to treat your request

It is required to have an existing API Key in the targeted environment (sandbox or production)