HEIR APIBuild Digital Inheritance Solutions

Programmatic access to smart contract generation, vault management, and estate planning tools

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API Reference

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📝

Smart Contract Generation

Generate inheritance smart contracts for Ethereum, Solana, and TON with a single API call. Support for multiple legal frameworks.

🔐

Secure by Design

API key authentication with tiered access, rate limiting, IP whitelisting, and webhook signature verification.

🪝

Real-time Webhooks

Subscribe to events like contract deployments, verifications, and dead man's switch triggers with automatic retries.

🎨

Embeddable Wizard

White-label the contract builder wizard in your application with custom branding and theming.

⚡

High Performance

Built for scale with tiered rate limits up to 10,000 requests per 15 minutes for enterprise customers.

📚

Comprehensive SDKs

Official SDKs for JavaScript, Python, and Go. OpenAPI spec for generating clients in any language.

Quick Example

bash

# Generate an inheritance contract
curl -X POST https://api.heir.es/api/v1/contracts/generate \
  -H "Authorization: Bearer heir_pk_xxx..." \
  -H "Content-Type: application/json" \
  -d '{
    "blockchain": "evm",
    "ownerAddress": "0x1234...",
    "beneficiaries": [
      { "name": "Alice", "address": "0xabc...", "percentage": 60 },
      { "name": "Bob", "address": "0xdef...", "percentage": 40 }
    ],
    "inheritanceTemplate": "common-law",
    "deadMansSwitch": { "enabled": true, "intervalDays": 365 }
  }'

API Access

All subscriptions include API access. Start with our free tier, then upgrade as you grow.

Tier	Rate Limit	Webhooks	Embedding	Included With
Free	100 req/day	❌	❌	Everyone
Starter	1,000 req/day	❌	❌	$49/mo subscription
Professional	10,000 req/day	✅	✅	$149/mo subscription
Enterprise	Unlimited	✅	✅	Custom subscription

Drafts Are Free

Create unlimited estate plan drafts at no cost on heir.es. You only pay when you deploy.

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