Dropbox Sign

Troubleshooting

If requests fail, run zero doctor check-connector --env-name DROPBOX_SIGN_TOKEN or zero doctor check-connector --url https://api.hellosign.com/v3/account --method GET

Authentication

Dropbox Sign uses HTTP Basic Auth with the API key as the username and an empty password. All curl examples below pass the token via -u "$DROPBOX_SIGN_TOKEN:" (note the trailing colon — it supplies the blank password).

Test Mode

For development, append test_mode=1 to every write request (the Dropbox Sign API accepts the form field on send, send_with_template, create_embedded, etc.). Test-mode signature requests are free and non-legally-binding — use them when wiring up or testing flows. To run in production mode, omit the field (defaults to production).

Account

Get Account Info

Verifies auth and returns the account email, plan quotas, and callback URL.

curl -s "https://api.hellosign.com/v3/account" -u "$DROPBOX_SIGN_TOKEN:" | jq '.account | {account_id, email_address, quotas, callback_url}'

Signature Requests

Send Signature Request (File Upload)

Send a document for signing. The body is multipart/form-data. Replace the local PDF path and signer fields as needed. Remove test_mode=1 for production.

curl -s -X POST "https://api.hellosign.com/v3/signature_request/send" -u "$DROPBOX_SIGN_TOKEN:" -F "title=NDA Agreement" -F "subject=Please sign this NDA" -F "message=Please review and sign at your earliest convenience." -F "signers[0][email_address]=signer@example.com" -F "signers[0][name]=Jane Signer" -F "file[0]=@/tmp/contract.pdf" -F "test_mode=1" | jq '.signature_request | {signature_request_id, title, is_complete, signatures: [.signatures[] | {signature_id, signer_email_address, status_code}]}'

Send Signature Request (File URL)

Provide a publicly reachable PDF URL instead of uploading the file.

curl -s -X POST "https://api.hellosign.com/v3/signature_request/send" -u "$DROPBOX_SIGN_TOKEN:" -F "title=NDA Agreement" -F "subject=Please sign" -F "signers[0][email_address]=signer@example.com" -F "signers[0][name]=Jane Signer" -F "file_url[0]=https://example.com/contract.pdf" -F "test_mode=1" | jq '.signature_request | {signature_request_id, title, is_complete}'

Send with Template

Send a request from a saved reusable template. Replace <template-id> with the template ID obtained from GET /v3/template/list.

curl -s -X POST "https://api.hellosign.com/v3/signature_request/send_with_template" -u "$DROPBOX_SIGN_TOKEN:" -F "template_ids[0]=<template-id>" -F "subject=Please sign this contract" -F "signers[Client][name]=Jane Signer" -F "signers[Client][email_address]=signer@example.com" -F "test_mode=1" | jq '.signature_request | {signature_request_id, title, signatures: [.signatures[] | {signature_id, signer_role, signer_email_address, status_code}]}'

The signers[Client] key uses the template's role name (e.g. Client, Manager). Inspect the template to confirm role names before sending.

Get Signature Request

Poll for status. Replace <signature-request-id> with the ID from the send response.

curl -s "https://api.hellosign.com/v3/signature_request/<signature-request-id>" -u "$DROPBOX_SIGN_TOKEN:" | jq '.signature_request | {signature_request_id, title, is_complete, is_declined, signatures: [.signatures[] | {signature_id, signer_email_address, status_code, signed_at}]}'

Useful status_code values: awaiting_signature, signed, declined, on_hold, error_unknown.

List Signature Requests

curl -s "https://api.hellosign.com/v3/signature_request/list?page=1&page_size=20" -u "$DROPBOX_SIGN_TOKEN:" | jq '{list_info, requests: [.signature_requests[] | {signature_request_id, title, is_complete, created_at}]}'

Add query= to filter. Example: ?query=subject:Contract+complete:false.

Cancel Signature Request

Cancels an incomplete signature request (emails a cancellation notice to the signers).

curl -s -X POST "https://api.hellosign.com/v3/signature_request/cancel/<signature-request-id>" -u "$DROPBOX_SIGN_TOKEN:"

A successful cancel returns HTTP 200 with an empty body.

Send Reminder

Resend the signing email to a specific signer on an open request.

curl -s -X POST "https://api.hellosign.com/v3/signature_request/remind/<signature-request-id>" -u "$DROPBOX_SIGN_TOKEN:" -F "email_address=signer@example.com" | jq '.signature_request | {signature_request_id, signatures: [.signatures[] | {signer_email_address, last_reminded_at}]}'

Files

Download Signed Files

Download the final signed PDF. Use file_type=pdf for a flat PDF or file_type=zip for all documents as a ZIP.

curl -s "https://api.hellosign.com/v3/signature_request/files/<signature-request-id>?file_type=pdf" -u "$DROPBOX_SIGN_TOKEN:" --output /tmp/signed_document.pdf

Get Signed File Download URL

Returns a short-lived S3 URL instead of the binary — useful when you want to share the link rather than download the bytes.

curl -s "https://api.hellosign.com/v3/signature_request/files/<signature-request-id>?get_url=1&file_type=pdf" -u "$DROPBOX_SIGN_TOKEN:" | jq '{file_url, expires_at}'

Templates

List Templates

curl -s "https://api.hellosign.com/v3/template/list?page=1&page_size=20" -u "$DROPBOX_SIGN_TOKEN:" | jq '{list_info, templates: [.templates[] | {template_id, title, message, signer_roles: [.signer_roles[].name]}]}'

Get Template

curl -s "https://api.hellosign.com/v3/template/<template-id>" -u "$DROPBOX_SIGN_TOKEN:" | jq '.template | {template_id, title, message, signer_roles: [.signer_roles[].name], custom_fields: [.custom_fields[] | {name, type, required}]}'

Common Status Codes

Guidelines

1. Always include `test_mode=1` while developing. Test-mode requests are free, do not email real recipients with legally binding documents, and are clearly marked as "TEST MODE" in the signing UI. Remove the flag only once you are ready to send a real signature request. 2. Auth is Basic with an empty password. Pass -u "$DROPBOX_SIGN_TOKEN:" (trailing colon matters). Do not send Authorization: Bearer ... — it will be rejected. 3. Bodies are `multipart/form-data`, not JSON. Use -F for every field; arrays use indexed keys like signers[0][name]. Nested objects use the same bracket syntax (form_fields_per_document[0][0][type]=text). 4. Signing order: add signers[0][order]=0, signers[1][order]=1 to require sequential signing. 5. Use templates for repeated contracts. Create the template once in the Dropbox Sign UI, then send via send_with_template — it's faster and lets non-technical teammates edit the document layout. 6. Poll `GET /signature_request/{id}` or configure a callback URL. The API supports webhook callbacks for signature_request_signed, signature_request_all_signed, etc. — far cheaper than polling. 7. Signed file URLs from `get_url=1` expire quickly (typically within a few minutes). Download immediately or regenerate on demand.