# BoldSign

**Canonical:** https://apis.io/providers/boldsign/  
**Website:** https://boldsign.com/esignature-api/  
**APIs profiled:** 11

BoldSign is an e-signature platform built by Syncfusion that provides a REST API for sending documents for electronic signature, managing reusable templates, tracking envelope status, and embedding signing and requesting workflows directly into third-party applications. The API supports both API key and OAuth 2.0 authentication and outputs JSON responses across US, EU, CA, and AU regional endpoints. BoldSign offers official SDKs for .NET, Python, Java, Node.js, and PHP, along with a free sandbox environment, a Postman collection, and an interactive API Explorer. The platform is SOC 2 Type II, HIPAA, GDPR, and eIDAS compliant, and supports webhooks for real-time event notifications.

## Kin Score — 45.4 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 45.4).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 69.7 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 39.5 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

## Agent readiness — 37.9 (agent-ready)

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

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (11)

- **BoldSign Branding API** — The Branding API from BoldSign — 6 operation(s) for branding.
- **BoldSign Contacts API** — The Contacts API from BoldSign — 5 operation(s) for contacts.
- **BoldSign Custom Field API** — The Custom Field API from BoldSign — 5 operation(s) for custom field.
- **BoldSign Document API** — The Document API from BoldSign — 25 operation(s) for document.
- **BoldSign GroupContacts API** — The GroupContacts API from BoldSign — 5 operation(s) for groupcontacts.
- **BoldSign Identity Verification API** — The Identity Verification API from BoldSign — 3 operation(s) for identity verification.
- **BoldSign Plan API** — The Plan API from BoldSign — 1 operation(s) for plan.
- **BoldSign Sender Identities API** — The Sender Identities API from BoldSign — 7 operation(s) for sender identities.
- **BoldSign Teams API** — The Teams API from BoldSign — 4 operation(s) for teams.
- **BoldSign Template API** — The Template API from BoldSign — 16 operation(s) for template.
- **BoldSign User API** — The User API from BoldSign — 8 operation(s) for user.

## Agentic access (1)

- **Boldsign Agentic Access** — 85 operations · 60 acting · 2 human-in-the-loop

## Security (2)

- **Boldsign Authentication** — apiKey · 2 schemes
- **Boldsign Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Boldsign Plans Pricing**

## Tags

E-Signature, Electronic Signature, Document-Management, Embedded Signing, Webhook, Templates, Identity Verification, Compliance

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