Integrate Digital Trust Into Your Applications
Empowering developers with institutional-grade blockchain infrastructure. Securely sign, notarize, and verify documents with a single API call or modular SDK.
const firma = require('@firma/sdk');// Initialize clientconst client = new firma({apiKey: 'YOUR_API_KEY',env: 'production'});// Anchoring document to blockchainconst receipt = await client.notarize({documentHash: 'sha256:4f8e...3a1',metadata: {contractId: 'TX-90210'}});console.log(`Verified on block: ${receipt.blockHeight}`);Why Choose FIRMA API & SDK?
RESTful API
Lightning-fast JSON endpoints designed for high concurrency and simple implementation across any tech stack.
Flexible SDK
Native support for Node.js, Python, Java, and Go. Pre-built modules to speed up your development cycle.
Complete Lifecycle
From creation and multi-party signing to archival and blockchain verification, we handle the entire document path.
Blockchain Integrity
Every action is immutable and cryptographically anchored to a public distributed ledger for absolute non-repudiation.
Automated Workflows
Set up smart triggers and webhooks to automate document distribution based on specific business conditions.
Enterprise Security
SOC2, GDPR, and ISO 27001 compliant infrastructure. AES-256 encryption at rest and TLS 1.3 in transit.
What You Can Integrate
One platform, limitless possibilities for secure digital operations.
Digital Signatures
eIDAS compliant biometric and digital signatures for all legal needs.
Document Notarization
Timestamping and official digital sealing of any file type instantly.
Blockchain Anchoring
Link physical or digital assets to permanent public ledger records.
Document Verification
Public-facing verification portals for authenticity cross-referencing.
Digital Identity & Consent
Verify users and capture explicit consent tied to identity hashes.
Workflow Automation
Automate conditional approvals and sequential signing pipelines.
Benefits of FIRMA API & SDK
For Developers
Zero-Config Setup
Go from 0 to 'Signed' in under 10 minutes with our comprehensive SDKs.
Robust Sandbox
Test everything in a mirror environment before moving to production.
Webhooks & Callbacks
Get real-time updates on document status without polling our API.
For Businesses
Cost Efficiency
Eliminate paper costs and courier fees while improving turnaround time by 90%.
Legal Compliance
Adhere to global regulations like eIDAS, ESIGN, and UETA effortlessly.
Brand Consistency
White-label our signature interface to match your corporate identity perfectly.
Built for Every Industry
Leading organizations across sectors rely on FIRMA for digital trust.
How It Works
Get Credentials
Sign up for a developer account and generate your secure API keys.
Explore Docs
Review our OpenAPI specifications and interactive SDK guides.
Integrate
Use our SDKs to hook into your existing document signing workflows.
Test & Deploy
Run full E2E tests in the sandbox and flip to production in one click.
Developer Tools & Resources
Security at Every
Layer
We treat security not as a feature, but as our fundamental core architecture. Your data is protected by the most advanced standards available.
Encrypted
AES-256 end-to-end encryption for all document storage and transit.
Authenticated
Multi-factor authentication and granular API key permissions control.
Blockchain-Anchored
Provable immutability via decentralized ledger timestamps.
Verifiable
Zero-knowledge proof verification systems for privacy-first trust.
Integrate Trust. Build Without Limits.
Join thousands of developers building the future of secure digital agreement infrastructure.