Dropbox Sign

Dropbox Sign (formerly HelloSign) is an eSignature platform that lets developers and businesses embed legally binding electronic signature workflows into their applications and websites. The product supports embedded signing and requesting, reusable templates, custom signer fields, branded signing flows, audit trails, and tamper-proof document delivery. The Dropbox Sign API is documented with an official OpenAPI specification and authenticated via HTTP Basic Auth with an API key or OAuth 2.0 Bearer tokens.

2 APIs 0 Features

eSignatureElectronic SignatureDocument SigningWorkflow AutomationDocuments

API Documentation

GitHubOrganization

Sources

aid: dropbox-sign
name: Dropbox Sign
description: >-
  Dropbox Sign (formerly HelloSign) is an eSignature platform that lets
  developers and businesses embed legally binding electronic signature
  workflows into their applications and websites. The product supports
  embedded signing and requesting, reusable templates, custom signer fields,
  branded signing flows, audit trails, and tamper-proof document delivery.
  The Dropbox Sign API is documented with an official OpenAPI specification
  and authenticated via HTTP Basic Auth with an API key or OAuth 2.0 Bearer
  tokens.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
  - eSignature
  - Electronic Signature
  - Document Signing
  - Workflow Automation
  - Documents
url: >-
  https://raw.githubusercontent.com/api-evangelist/dropbox-sign/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-30'
specificationVersion: '0.19'
apis:
  - aid: dropbox-sign:rest-api
    name: Dropbox Sign REST API
    description: >-
      Versioned REST API (v3) for sending signature requests, managing
      templates, teams, accounts, embedded signing/requesting flows, OAuth
      apps, and reports. Authentication is HTTP Basic Auth with an API key or
      OAuth 2.0 Bearer tokens; the API ships with an officially maintained
      OpenAPI specification used to generate SDKs and reference docs.
    humanURL: https://developers.hellosign.com/api/api-reference-welcome
    baseURL: https://api.hellosign.com/v3
    tags:
      - eSignature
      - Electronic Signature
      - Document Signing
      - Documents
    properties:
      - type: Documentation
        url: https://developers.hellosign.com/api/api-reference-welcome
      - type: OpenAPI
        url: https://github.com/hellosign/hellosign-openapi/blob/main/openapi.yaml
      - type: GitHub OpenAPI Repo
        url: https://github.com/hellosign/hellosign-openapi
      - type: GettingStarted
        url: https://developers.hellosign.com/api/reference
  - aid: dropbox-sign:events-api
    name: Dropbox Sign Events and Callbacks API
    description: >-
      Outbound event / callback surface for Dropbox Sign. The platform POSTs
      JSON event payloads (wrapped in a `multipart/form-data` `json` field)
      to a subscriber-configured URL whenever signature requests, templates,
      and account-level activity change state. Two callback scopes are
      supported: account callbacks (configured on the authenticated account)
      and app callbacks (configured per API app and routed by `client_id`).
      Authenticity is verified via the `event.event_hash` field, computed as
      HMAC-SHA256 of `event_time + event_type` keyed by the receiving
      account's API key.
    humanURL: https://developers.hellosign.com/docs/events/overview/
    tags:
      - eSignature
      - Webhooks
      - Events
      - Callbacks
      - Event-Driven
    properties:
      - type: Documentation
        url: https://developers.hellosign.com/docs/events/overview/
      - type: Walkthrough
        url: https://developers.hellosign.com/docs/events/walkthrough/
      - type: AccountCallbacks
        url: https://developers.hellosign.com/api/reference/operation/accountUpdateEventCallback/
      - type: AppCallbacks
        url: https://developers.hellosign.com/api/reference/operation/apiAppCreateEventCallback/
      - type: AsyncAPI
        url: https://raw.githubusercontent.com/api-evangelist/dropbox-sign/refs/heads/main/asyncapi/dropbox-sign-events-asyncapi.yml

common:
  - type: LinkedIn
    url: https://www.linkedin.com/company/dropboxsign
  - type: Website
    url: https://sign.dropbox.com
  - type: Documentation
    url: https://developers.hellosign.com
  - type: API Documentation
    url: https://developers.hellosign.com/api/api-reference-welcome
  - type: Pricing
    url: https://sign.dropbox.com/pricing
  - type: SignUp
    url: https://sign.dropbox.com/signup
  - type: GitHubOrganization
    url: https://github.com/hellosign
  - type: LLMsTxt
    url: https://developers.hellosign.com/llms.txt
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com

Dropbox Sign

APIs

Dropbox Sign REST API

Dropbox Sign Events and Callbacks API

Event Specifications

Dropbox Sign Events and Callbacks

Resources

Sources