SignatureAPI
Electronic Signature API
Visit signatureapi.com →DocsPricing
REST API for sending documents for electronic signature. Supports envelopes with multiple documents and up to 10 recipients, sequential or parallel signing, document templates (.docx), embedded signing for web and React Native, webhooks, recipient authentication methods, and cryptographically sealed deliverables with audit logs. Also offers no-code connectors for Power Automate and Zapier, an AI toolkit for agents, and a dashboard for tracking signing activity. Signatures are legally binding under ESIGN, UETA, and eIDAS (SES).
- Category
- APIs & backend
- Pricing
- usage_based · from $0.25 per envelope; standard plan $25/month with first 100 envelopes included
- Free tier
- yes
- API
- yes
- MCP server
- yes
- SDK
- unknown
- Open source
- no
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Listed 2026-10-25 · last verified 2026-10-25 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.95
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API
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