# Dropbox Sign (HelloSign)

**Canonical:** https://apis.io/providers/hellosign/  
**Website:** https://developers.hellosign.com/  
**APIs profiled:** 12

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.

## Kin Score — 64.0 / 100 (strong)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 64.0).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 70.1 |
| Governance | 20.8 |
| Operational Transparency | 63.2 |
| Developer Ergonomics | 77.7 |
| Commercial Clarity | 60.5 |

## Agent readiness — 64.6 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| MCP Server | yes |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | verified |
| Event Surface Described | yes |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (12)

- **Dropbox Sign (HelloSign) Account API** — {'$ref': './markdown/en/tags/account-tag-description.md'}
- **Dropbox Sign (HelloSign) Api App API** — {'$ref': './markdown/en/tags/api-app-tag-description.md'}
- **Dropbox Sign (HelloSign) Bulk Send Job API** — {'$ref': './markdown/en/tags/bulk-send-job-tag-description.md'}
- **Dropbox Sign (HelloSign) Embedded API** — {'$ref': './markdown/en/tags/embedded-tag-description.md'}
- **Dropbox Sign (HelloSign) Fax API** — The Fax API from Dropbox Sign (HelloSign) — 4 operation(s) for fax.
- **Dropbox Sign (HelloSign) Fax Line API** — {'$ref': './markdown/en/tags/fax-lines-tag-description.md'}
- **Dropbox Sign (HelloSign) OAuth API** — {'$ref': './markdown/en/tags/oauth-tag-description.md'}
- **Dropbox Sign (HelloSign) Report API** — {'$ref': './markdown/en/tags/report-tag-description.md'}
- **Dropbox Sign (HelloSign) Signature Request API** — {'$ref': './markdown/en/tags/signature-request-tag-description.md'}
- **Dropbox Sign (HelloSign) Team API** — {'$ref': './markdown/en/tags/team-tag-description.md'}
- **Dropbox Sign (HelloSign) Template API** — {'$ref': './markdown/en/tags/template-tag-description.md'}
- **Dropbox Sign (HelloSign) Unclaimed Draft API** — {'$ref': './markdown/en/tags/unclaimed-draft-tag-description.md'}

## MCP servers (1)

- **hellosign-mcp.yml**

## Agentic access (1)

- **Hellosign Agentic Access** — 73 operations · 46 acting

## Security (4)

- **Hellosign Authentication** — http · 2 schemes
- **Hellosign Domain Security** — TLSv1.3 · DMARC
- **Hellosign Vulnerability Disclosure** — Intigriti · security.txt · contact published
- **Hellosign Trust Center** — HIPAA, ISO 9001, SOC (CPA/AICPA attestation), Skyhigh Enterprise-Ready

## Tags

Company, eSignature, Electronic Signatures, Documents, Digital Agreements, Signature Workflow, Embedded Signing, Compliance

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/hellosign/). Scores are computed from the provider's own public artifacts under a published rubric.