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.
Firma 12 introduces a Data MCP server with 84 tools across 10 distinct categories.
Users can manage signing requests, templates, and webhooks via conversational AI without writing code.
The platform utilizes OAuth for seamless authentication within AI clients like Claude and ChatGPT.
E-signature costs are set at €0.029 per envelope with a pure pay-as-you-go billing model.
The dual architecture includes a Docs MCP server for live API documentation queries.
Real-world implementations report cost reductions of up to 94% compared to legacy providers.
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.”
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. In comparison, legacy providers like DocuSign often charge enterprise customers significantly higher rates per envelope depending on plan and volume.
The pricing has driven real results for firms like Hawaiian property management platform Clear. CEO Paul Jolley estimates savings between $5,000 and $10,000 over the next year after switching to Firma.dev. “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.”
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.
This accessibility allowed Yavuz Selim Mert, founder of Splendid Consulting, to integrate the API without prior coding experience. Using ChatGPT to guide his setup, he completed the integration in about a day and reduced monthly costs from $230 to approximately $14. Ghali Bennani, co-founder of fintech startup Ralio, also highlighted the efficiency of the system, noting that his setup took under five minutes.
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