Firma.dev Cheap E-Signature API
VerifiedFeaturedRemoteAbout Firma.dev Cheap E-Signature API
Firma.dev provides a developer-focused e-signature API for adding document signing to software products. It includes embeddable signing interfaces, multi-tenant workspaces, white-label options, and a remote MCP server integration guide.
Key features
- 01REST API with OpenAPI specifications
- 02Embeddable editors and signing interface
- 03White-label domains and branding
- 04Isolated multi-tenant workspaces
- 05Audit trails and completion certificates
Use cases
- 01Add document signing to a SaaS product
- 02Embed signing flows in a web application
- 03Offer branded signatures to customers
- 04Manage signing across customer workspaces
MCP support
The documentation includes an integration guide for an MCP Server. The input does not describe the server's MCP tools or behavior.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://docs.firma.dev/mcpclaude mcp add --transport http firma-dev-cheap-e-signature-api https://docs.firma.dev/mcp{"mcpServers":{"firma-dev-cheap-e-signature-api":{"type":"http","url":"https://docs.firma.dev/mcp"}}}Open in Cursor{"servers":{"firma-dev-cheap-e-signature-api":{"type":"http","url":"https://docs.firma.dev/mcp"}}}Open in VS Code{"mcpServers":{"firma-dev-cheap-e-signature-api":{"type":"http","url":"https://docs.firma.dev/mcp"}}}{"mcpServers":{"firma-dev-cheap-e-signature-api":{"serverUrl":"https://docs.firma.dev/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
3| Parameter | Type | Required | Description |
|---|---|---|---|
| query | string | Yes | Search query |
| version | string | No | Filter to specific version (e.g., 'v0.7') |
| language | string | No | Filter to specific language code (e.g., 'zh', 'es'). Defaults to 'en' |
Details
From the project README
The cheapest e-signature API, built for developers
Only €0.049 per envelope (~5¢). No minimums, no contracts, no monthly fees.
Embed document signing into your SaaS with a few lines of code.
Get your API key · Docs · Quick Start · API Reference · Pricing
SOC 2 · GDPR · ISO 27001 · eIDAS · EU Data Residency
Why developers choose Firma
- Minutes to integrate. Simple REST API, OpenAPI specs, and pre-built UI components. Most teams ship in an evening.
- Pay per envelope. €0.049 (~5¢) per envelope. No subscriptions, no tiers, no surprises. Start for free.
- Fully white-labeled. Custom domains, branding, email templates, and certificates. Your users never see Firma.
- Multi-tenant from day one. Isolated workspaces for each of your customers with granular permissions.
- Embeddable everything. Drop-in template editor, signing request editor, and signing experience. Works with React, Vue, Angular, vanilla JS, and mobile.
- Compliant and secure. ESIGN, UETA, and eIDAS compliant. SOC 2 Type II, ISO 27001, GDPR. Audit trails and certificates of completion on every document.
- Resell-ready. Built to be rebranded and bundled. Turn e-signatures into a revenue stream.
Documentation
This repo powers docs.firma.dev, built with Mintlify.
50+ guides covering authentication, embeds, webhooks, field prefilling, conditional logic, white-labeling, multi-tenant setup, localization, security, and more.
Versioned API reference with interactive endpoint pages and full OpenAPI specs. Latest: v1.37.0.
Available in English, Spanish, and French.
Integration guides
Ready-made guides for the platforms developers are already building with:
Lovable · Bolt · Cursor · Claude Code · Replit · v0 · n8n · Salesforce · Supabase · Cloudflare · ChatGPT · Gemini · Mistral · GitHub Copilot · MCP Server
Get started
- Sign up for free (no credit card required)
- Grab your API key from the dashboard
- Follow the quick start to send your first document
Links
| Main site | firma.dev |
| Documentation | docs.firma.dev |
| API Changelog | docs.firma.dev/guides/api-changelog |
| Status | status.firma.dev |
| Support | Help in the sidebar of the Firma dashboard |
Comments
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