aid: hellosign
name: Dropbox Sign (HelloSign)
description: >-
  Dropbox Sign (formerly HelloSign) is an eSignature platform whose v3 REST API
  lets developers send documents for legally binding electronic signature, build
  reusable templates, embed signing directly in their own apps, run bulk send
  jobs, and manage accounts, teams, and API apps. The API exposes 73 operations
  across 12 product areas (Signature Request, Template, Bulk Send, Embedded,
  Account, Team, Report, Fax, Fax Line, Unclaimed Draft, API App, OAuth), with
  API-key and OAuth 2.0 authentication, 23 webhook event types, official SDKs in
  six languages, and a published hosted documentation MCP server. HelloSign was a
  Y Combinator company (S11), acquired by Dropbox in 2019 and rebranded to Dropbox
  Sign in 2022; the API base host remains api.hellosign.com.
url: https://raw.githubusercontent.com/api-evangelist/hellosign/refs/heads/main/apis.yml
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://github.com/hellosign.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: enriched
x-tier-reason: real-api-enriched
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- eSignature
- Electronic Signatures
- Documents
- Digital Agreements
- Signature Workflow
- Embedded Signing
- Compliance
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: hellosign:hellosign-account-api
  name: Dropbox Sign (HelloSign) Account API
  description: '{''$ref'': ''./markdown/en/tags/account-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/hellosign-account-api-openapi.yml
- aid: hellosign:hellosign-api-app-api
  name: Dropbox Sign (HelloSign) Api App API
  description: '{''$ref'': ''./markdown/en/tags/api-app-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Api App
  properties:
  - type: OpenAPI
    url: openapi/hellosign-api-app-api-openapi.yml
- aid: hellosign:hellosign-bulk-send-job-api
  name: Dropbox Sign (HelloSign) Bulk Send Job API
  description: '{''$ref'': ''./markdown/en/tags/bulk-send-job-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Bulk Send Job
  properties:
  - type: OpenAPI
    url: openapi/hellosign-bulk-send-job-api-openapi.yml
- aid: hellosign:hellosign-embedded-api
  name: Dropbox Sign (HelloSign) Embedded API
  description: '{''$ref'': ''./markdown/en/tags/embedded-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Embedded
  properties:
  - type: OpenAPI
    url: openapi/hellosign-embedded-api-openapi.yml
- aid: hellosign:hellosign-fax-api
  name: Dropbox Sign (HelloSign) Fax API
  description: The Fax API from Dropbox Sign (HelloSign) — 4 operation(s) for fax.
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Fax
  properties:
  - type: OpenAPI
    url: openapi/hellosign-fax-api-openapi.yml
- aid: hellosign:hellosign-fax-line-api
  name: Dropbox Sign (HelloSign) Fax Line API
  description: '{''$ref'': ''./markdown/en/tags/fax-lines-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Fax Line
  properties:
  - type: OpenAPI
    url: openapi/hellosign-fax-line-api-openapi.yml
- aid: hellosign:hellosign-oauth-api
  name: Dropbox Sign (HelloSign) OAuth API
  description: '{''$ref'': ''./markdown/en/tags/oauth-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - OAuth
  properties:
  - type: OpenAPI
    url: openapi/hellosign-oauth-api-openapi.yml
- aid: hellosign:hellosign-report-api
  name: Dropbox Sign (HelloSign) Report API
  description: '{''$ref'': ''./markdown/en/tags/report-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Report
  properties:
  - type: OpenAPI
    url: openapi/hellosign-report-api-openapi.yml
- aid: hellosign:hellosign-signature-request-api
  name: Dropbox Sign (HelloSign) Signature Request API
  description: '{''$ref'': ''./markdown/en/tags/signature-request-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Signature Request
  properties:
  - type: OpenAPI
    url: openapi/hellosign-signature-request-api-openapi.yml
- aid: hellosign:hellosign-team-api
  name: Dropbox Sign (HelloSign) Team API
  description: '{''$ref'': ''./markdown/en/tags/team-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Team
  properties:
  - type: OpenAPI
    url: openapi/hellosign-team-api-openapi.yml
- aid: hellosign:hellosign-template-api
  name: Dropbox Sign (HelloSign) Template API
  description: '{''$ref'': ''./markdown/en/tags/template-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Template
  properties:
  - type: OpenAPI
    url: openapi/hellosign-template-api-openapi.yml
- aid: hellosign:hellosign-unclaimed-draft-api
  name: Dropbox Sign (HelloSign) Unclaimed Draft API
  description: '{''$ref'': ''./markdown/en/tags/unclaimed-draft-tag-description.md''}'
  humanURL: https://developers.hellosign.com/
  baseURL: https://api.hellosign.com/v3
  tags:
  - Unclaimed Draft
  properties:
  - type: OpenAPI
    url: openapi/hellosign-unclaimed-draft-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/hellosign-agentic-access.yml
- type: DomainSecurity
  url: security/hellosign-domain-security.yml
- type: Authentication
  url: authentication/hellosign-authentication.yml
- type: OAuthScopes
  url: scopes/hellosign-scopes.yml
- type: MCPServer
  url: mcp/hellosign-mcp.yml
- type: LLMsTxt
  url: llms/hellosign-llms.txt
- type: Packages
  url: packages/hellosign-packages.yml
- type: SDKs
  url: packages/hellosign-packages.yml
- type: ErrorCatalog
  url: errors/hellosign-error-codes.yml
- type: Conventions
  url: conventions/hellosign-conventions.yml
- type: Lifecycle
  url: lifecycle/hellosign-lifecycle.yml
- type: StatusPage
  url: https://status.hellosign.com/
- type: Deprecation
  url: lifecycle/hellosign-lifecycle.yml
- type: Conformance
  url: conformance/hellosign-conformance.yml
- type: Compliance
  url: https://sign.dropbox.com/trust
- type: TrustCenter
  url: security/hellosign-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/hellosign-vulnerability-disclosure.yml
- type: Security
  url: https://app.intigriti.com/programs/dropbox/dropbox-vdp
- type: Webhooks
  url: asyncapi/hellosign-events-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Sandbox
  url: sandbox/hellosign-sandbox.yml
- type: Components
  url: components/hellosign-components.yml
- type: DataModel
  url: data-model/hellosign-data-model.yml
- type: ChangeLog
  url: changelog/hellosign-changelog.yml
- type: DeveloperPortal
  url: https://developers.hellosign.com/
- type: Documentation
  url: https://developers.hellosign.com/docs/overview/
- type: APIReference
  url: https://developers.hellosign.com/api/reference/
- type: GettingStarted
  url: https://developers.hellosign.com/api/api-quickstart
- type: Support
  url: https://help.dropbox.com/sign
- type: GitHubOrganization
  url: https://github.com/hellosign
- type: Pricing
  url: https://sign.dropbox.com/products/api
- type: SignUp
  url: https://app.hellosign.com/account/signUp
- type: TermsOfService
  url: https://www.hellosign.com/terms
- type: PrivacyPolicy
  url: https://www.hellosign.com/privacy
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence