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Pay-per-call eSignature + ID verification. Starting at $0.08.

All software will be priced like this. We're first. Send a contract for signature, or verify an ID, in one HTTPS call. Full feature set: eIDAS-Advanced signing, X.509 certificates, OCR, liveness, face matching. Pay per use — no subscriptions, no minimums. Envelope signing at $0.10; ID verification starting at $0.08 with à la carte add-ons. Built for developers and AI agents.

The lodestone, in five lines Read the quickstart → 
curl -X POST https://api.verafirma.com/v1/envelopes \
  -H "PAYMENT-SIGNATURE: $(cat payment.b64)" \
  -F 'pdf=@contract.pdf' \
  -F 'payload={"title":"NDA","recipients":[{"email":"x@example.com","name":"X","role":"SIGNER"}]}'

All software will be priced like this.

We're here first. Pay per call — $0.10 per envelope, ID verification starting at $0.08. Full feature set. No subscriptions, no minimums.

Pay only for the checks you run

ID checking · Liveness detection · Face matching · Secure document signing · Multi-signer envelopes · X.509 certificates · ESIGN + UETA + GDPR compliant. Granular à la carte pricing — start at $0.08 per ID check, add only the components you need. DocuSign charges ~$3 per envelope for the same signing capability.

Learn more →

Agent-native

x402 per-call payment. MCP discovery. OpenAPI 3.1. llms.txt. Built for the agent economy from day one.

Compliant with ESIGN Act · UETA · eIDAS · GDPR · SOC 2 framework · X.509 signing certificates on every completed document.

Pricing in one line

$0.10 per envelope. Pay per call — no minimum, no commitment. Refunded automatically on terminal failure (rejected, expired, cancelled) up to a per-envelope cap.

See the per-mode breakdown →

Discover the API

  • Quickstart — five-line curl from PDF + recipient + payment to signing URL.
  • The lodestone path — design rationale for the canonical agent use case.
  • x402 wire format — EIP-3009 per-call payment authorization.
  • MCP — point an MCP-compatible client at https://api.verafirma.com/mcp.
  • API reference — audience-augmented OpenAPI 3.1 surface.
  • llms.txt + llms-full.txt — agent-friendly discovery surfaces.