What is Firma.dev?
Pay-per-envelope e-signature API that SaaS teams embed and rebrand inside their own products.
Who is Firma.dev best for?
Firma.dev is best for SaaS developers who need white-labeled document signing inside their own product.
SaaS platforms
Each of your customers gets an isolated team with its own branding, webhooks and API key, at no extra cost.
Signing inside your app
Template and signing editors embed in your product, so signers never leave it or see another brand.
High-volume sending
A flat price per envelope with no monthly minimum keeps the cost of each signed document predictable.
Apps built with AI tools
Guides cover Lovable, Bolt, v0 and Replit apps, and MCP servers connect Claude Code, Cursor and GitHub Copilot.
How much does Firma.dev cost?
Firma.dev charges a flat €0.049 per envelope, about 5 US cents, with no subscription, minimum or seat fees; test keys are free and watermark their documents.
- Full API access, unlimited teams and API keys
- Embedded template and signing editors
- No minimums, contracts or seat fees
- Email replies within 1 business day
- Add-on to pay-as-you-go use
Envelopes are bought as credits in the dashboard and shared across workspaces. Prices are set in euros but billed in your local currency, from 30+ currencies. Each workspace has a test API key that uses no credits and watermarks its documents. Sign-up needs no credit card. Full pricing on firma.dev. We checked these prices on .
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How do I connect Firma.dev to my AI agent?
Firma.dev MCP is Firma.dev's official MCP server. Add it to your agent once, then ask it to send documents for e-signature and manage templates in Firma.dev.
Connects your agent to Firma.dev, an e-signature API, so you can set up templates, send signing requests and check their status, or search its developer docs.
$ claude mcp add --transport http firma-dev https://mcp.firma.dev/mcp
Claude Code connects to Firma.dev over the web.
Run /mcp and sign in to Firma.dev in the browser.
Then ask your agent
- Runs
- On the web
- Sign-in
- OAuth
- Checked
- Answered 13 Nov
- Guide
- docs.firma.dev
Questions about Firma.dev
What is Firma.dev?
Pay-per-envelope e-signature API that SaaS teams embed and rebrand inside their own products.
Who is Firma.dev for?
Firma.dev is best for SaaS developers who need white-labeled document signing inside their own product.
Can I try Firma.dev for free?
Yes. Sign-up needs no credit card, and each workspace has a test API key that uses no credits and produces watermarked documents. Live envelopes cost €0.049 each, bought as credits.
How much does Firma.dev cost?
Firma.dev's paid plans are Pay as you go at €0.049 per envelope and Priority Support at €100 per month.
Does Firma.dev have an MCP server?
Yes. Firma.dev MCP is Firma.dev's official MCP server, so agents such as Claude Code, Cursor, Codex and GitHub Copilot can send documents for e-signature and manage templates in Firma.dev. Firma.dev runs it on the web and you sign in with your Firma.dev account.
Where can I try Firma.dev?
On its official website, firma.dev.
Are Firma.dev signatures legally binding?
Firma.dev says its signatures are aligned with the ESIGN and UETA acts in the US, eIDAS in the EU and GDPR. Each completed document comes with an audit trail and a certificate of completion.
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