Dropbox Sign website screenshot

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.

Dropbox Sign publishes 6 APIs on the APIs.io network, including Events and Callbacks API, Account API, API App API, and 3 more. Tagged areas include E-Signature, Electronic Signature, Document Signing, Workflow-Automation, and Documents.

The Dropbox Sign catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Dropbox Sign’s developer surface includes authentication, documentation, pricing, signup flow, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
33.7/100 thin ▬ flat Agent 23/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessSelf serve
1 APIs
E-SignatureElectronic SignatureDocument SigningWorkflow-AutomationDocuments

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 33.7/100 · thin
Contract Quality 14.1 / 23
Developer Ergonomics 5.6 / 18
Access Clarity 3.8 / 18
Operational Transparency 0.3 / 12
Contract Governance 1.2 / 11
Discoverability 6.0 / 9
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 23/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 6 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/dropbox-sign: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

Dropbox Sign Events and Callbacks API

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 whene...

Dropbox Sign Account API

The Account API from Dropbox Sign — 3 operation(s) for account.

Dropbox Sign API App API

The API App API from Dropbox Sign — 3 operation(s) for api app.

Dropbox Sign Bulk Send Job API

The Bulk Send Job API from Dropbox Sign — 2 operation(s) for bulk send job.

Dropbox Sign Embedded API

The Embedded API from Dropbox Sign — 2 operation(s) for embedded.

Dropbox Sign Fax API

The Fax API from Dropbox Sign — 2 operation(s) for fax.

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Dropbox Sign Account API

OPEN COLLECTION

Dropbox Sign Account API App API

OPEN COLLECTION

Dropbox Sign Account Bulk Send Job API

OPEN COLLECTION

Dropbox Sign Account Embedded API

OPEN COLLECTION

Dropbox Sign Account Fax API

OPEN COLLECTION

Dropbox Sign API

OPEN COLLECTION

Scroll for all 7

GraphQL 1

GraphQL schemas published by this provider.

Dropbox Sign (HelloSign) GraphQL Schema

This conceptual GraphQL schema represents the Dropbox Sign (formerly HelloSign) eSignature REST API v3. Dropbox Sign provides legally binding electronic signature workflows incl...

GRAPHQL

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Dropbox Sign Events and Callbacks

AsyncAPI description of the Dropbox Sign (formerly HelloSign) outbound event / callback surface. Dropbox Sign delivers event notifications by issuing HTTP POST requests to a sub...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Dropbox Sign API Rules

4 rules · 1 errors 3 warnings

SPECTRAL

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Dropbox Sign Authentication

http/oauth2 · 2 schemes

SECURITY

Dropbox Sign Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Dropbox Sign Trust Center

SOC 2, ISO 27001, ISO 27017, ISO 27018, PCI DSS, HIPAA, GDPR, CSA STAR

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Dropbox Sign Scopes

5 scopes · authorizationCode

5 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Dropbox Sign Agentic Access

15 operations · 8 acting

15 operations · 8 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Signup
Signup

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 API Documentation
API Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 DomainSecurity
DomainSecurity
 Authentication
Authentication
 OAuthScopes
OAuthScopes

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
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
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/dropbox-sign.png
tags:
- E-Signature
- Electronic Signature
- Document Signing
- Workflow-Automation
- Documents
tags_raw:
- 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: '0.23'
apis:
- 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:
  - E-Signature
  - Webhook
  - Event
  - Callbacks
  - Event-Driven
  tags_raw:
  - 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
- aid: dropbox-sign:dropbox-sign-account-api
  name: Dropbox Sign Account API
  description: The Account API from Dropbox Sign — 3 operation(s) for account.
  humanURL: https://developers.hellosign.com/api/api-reference-welcome
  baseURL: https://api.hellosign.com/v3
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/dropbox-sign-account-api-openapi.yml
  - type: Documentation
    url: https://developers.hellosign.com/api/api-reference-welcome
  - type: GitHub OpenAPI Repo
    url: https://github.com/hellosign/hellosign-openapi
  - type: GettingStarted
    url: https://developers.hellosign.com/api/reference
  - type: GraphQL
    url: graphql/dropbox-sign-graphql.md
- aid: dropbox-sign:dropbox-sign-api-app-api
  name: Dropbox Sign API App API
  description: The API App API from Dropbox Sign — 3 operation(s) for api app.
  humanURL: https://developers.hellosign.com/api/api-reference-welcome
  baseURL: https://api.hellosign.com/v3
  tags:
  - API App
  properties:
  - type: OpenAPI
    url: openapi/dropbox-sign-api-app-api-openapi.yml
  - type: Documentation
    url: https://developers.hellosign.com/api/api-reference-welcome
  - type: GitHub OpenAPI Repo
    url: https://github.com/hellosign/hellosign-openapi
  - type: GettingStarted
    url: https://developers.hellosign.com/api/reference
  - type: GraphQL
    url: graphql/dropbox-sign-graphql.md
- aid: dropbox-sign:dropbox-sign-bulk-send-job-api
  name: Dropbox Sign Bulk Send Job API
  description: The Bulk Send Job API from Dropbox Sign — 2 operation(s) for bulk send job.
  humanURL: https://developers.hellosign.com/api/api-reference-welcome
  baseURL: https://api.hellosign.com/v3
  tags:
  - Bulk Send Job
  properties:
  - type: OpenAPI
    url: openapi/dropbox-sign-bulk-send-job-api-openapi.yml
  - type: Documentation
    url: https://developers.hellosign.com/api/api-reference-welcome
  - type: GitHub OpenAPI Repo
    url: https://github.com/hellosign/hellosign-openapi
  - type: GettingStarted
    url: https://developers.hellosign.com/api/reference
  - type: GraphQL
    url: graphql/dropbox-sign-graphql.md
- aid: dropbox-sign:dropbox-sign-embedded-api
  name: Dropbox Sign Embedded API
  description: The Embedded API from Dropbox Sign — 2 operation(s) for embedded.
  humanURL: https://developers.hellosign.com/api/api-reference-welcome
  baseURL: https://api.hellosign.com/v3
  tags:
  - Embedded
  properties:
  - type: OpenAPI
    url: openapi/dropbox-sign-embedded-api-openapi.yml
  - type: Documentation
    url: https://developers.hellosign.com/api/api-reference-welcome
  - type: GitHub OpenAPI Repo
    url: https://github.com/hellosign/hellosign-openapi
  - type: GettingStarted
    url: https://developers.hellosign.com/api/reference
  - type: GraphQL
    url: graphql/dropbox-sign-graphql.md
- aid: dropbox-sign:dropbox-sign-fax-api
  name: Dropbox Sign Fax API
  description: The Fax API from Dropbox Sign — 2 operation(s) for fax.
  humanURL: https://developers.hellosign.com/api/api-reference-welcome
  baseURL: https://api.hellosign.com/v3
  tags:
  - Fax
  properties:
  - type: OpenAPI
    url: openapi/dropbox-sign-fax-api-openapi.yml
  - type: Documentation
    url: https://developers.hellosign.com/api/api-reference-welcome
  - type: GitHub OpenAPI Repo
    url: https://github.com/hellosign/hellosign-openapi
  - type: GettingStarted
    url: https://developers.hellosign.com/api/reference
  - type: GraphQL
    url: graphql/dropbox-sign-graphql.md
common:
- type: AgenticAccess
  url: agentic-access/dropbox-sign-agentic-access.yml
- type: TrustCenter
  url: security/dropbox-sign-trust-center.yml
- type: DomainSecurity
  url: security/dropbox-sign-domain-security.yml
- type: Authentication
  url: authentication/dropbox-sign-authentication.yml
- type: OAuthScopes
  url: scopes/dropbox-sign-scopes.yml
- 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: LlmsText
  url: https://developers.hellosign.com/llms.txt
- type: Blog
  url: https://sign.dropbox.com/blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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