At €0.029 per envelope, the world’s most affordable e-signature API now ships dual MCP servers with 84 AI-ready tools for documentation and live data, letting anyone send, track, and manage signing requests from Claude, ChatGPT, Cursor, or any MCP-compatible AI tool. No developer required.

Firma.dev, the developer-first e-signature API used by thousands of developers worldwide, announced the release of Firma 12 with dual MCP (Model Context Protocol) server integration. The update makes Firma.dev the first e-signature platform in the world to offer both a documentation MCP server and a full data MCP server, giving users complete control of their e-signature workflows through AI tools like Claude, ChatGPT, Cursor, GitHub Copilot, VS Code, and OpenAI Codex.

The Data MCP server, new in Firma 12, provides 84 tools across 10 categories, covering signing requests, templates, workspaces, webhooks, email domains, custom fields, and more. Users can create signing requests, send documents, check envelope statuses, manage templates, and query usage data, all without writing a single line of code or downloading anything. Authentication is handled through OAuth, so getting started is as simple as adding the server URL to your AI client and signing in with your Firma.dev account.

“You can literally say ‘send the standard NDA to Sarah’ inside Claude, and it happens,” said Derick Dorner, co-founder of Firma.dev. “We’ve removed the last barrier between people and e-signatures. You don’t need to be a developer. You don’t need to learn an API. You just talk to your AI.”

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The World’s Most Affordable E-Signature API

Firma 12’s AI-native capabilities arrive alongside pricing that remains unmatched in the industry. At €0.029 per envelope (roughly 3¢ USD), Firma.dev operates on a pure pay-as-you-go model with no monthly minimums, no per-seat fees, and no contracts. For context, legacy providers like DocuSign charge enterprise customers anywhere from $1 to $5+ per envelope depending on plan and volume.

The pricing has driven real results. Paul Jolley, CEO of Clear, a Hawaiian property management platform processing around 20,000 envelopes per month, switched from DocuSign to Firma.dev and estimates savings between $5,000 and $10,000 over the next year. He completed his integration, including a complex 107-data-point lease agreement template, in a day and a half.

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“Firma.dev is what I’ve always wanted,” Jolley said. “The billing model is like Twilio. You just use it and pay for what you send.”

Built for the AI Workflow

The dual MCP architecture in Firma 12 reflects a broader shift in how software gets built and operated. The Docs MCP server, launched in February 2026, lets developers query live API documentation from within their coding environment. The new Data MCP server goes further: it connects directly to a user’s Firma.dev workspace, enabling real operations through conversational AI.

Yavuz Selim Mert, founder of Splendid Consulting in Toronto, integrated Firma.dev without any prior coding experience. Using ChatGPT to guide his setup, he completed his entire integration in about a day and reduced his monthly e-signature costs from $230 with his previous provider to approximately $14 with Firma.dev, a 94% cost reduction.

“I found Firma.dev because AI recommended it to me,” Mert said. “Then I built the whole thing using AI. It’s the perfect example of how these tools are supposed to work together.”

Ghali Bennani, co-founder of London-based fintech startup Ralio, specifically sought out Firma.dev for its MCP integration. His setup took under five minutes.