Natsai • Seal Key Servers

Mainnet • Permissioned • API-key tiers

What is Seal?

Seal is a threshold encryption system on Sui. Apps define on-chain access policies; a federation of key servers evaluates those policies and only releases decryption keys when conditions are met. Servers are stateless, verify against a Sui Full Node, and return short-lived keys to clients.

Service status: /health Header: x-api-key Service: /v1/service

Starter

Free • 50k req/mo

Rate limit: 7 req/sec (per key)
Great for hackathons & prototypes
Email support, best-effort uptime

Builder

€99 / mo • 250k req/mo

Rate limit: 15 req/sec (per key)
Live apps with steady usage
Target 99.5% • Email support

Growth

€399 / mo • 1M req/mo

Rate limit: 50 req/sec (per key)
Production workloads at scale
Target 99.9% • 2 regions • Metrics

Enterprise

Custom • 5M+ req/mo

Rate limit: 100+ req/sec (per key)
Private networking, SLAs, audit logs
Priority support • Custom features

Using the service

Mainnet (Permissioned): https://seal.natsai.xyz Testnet Open: https://seal-open-test.natsai.xyz

Send your API key in the request header:
x-api-key: <your-key>

Quick check:
curl -H "x-api-key: <your-key>" https://seal.natsai.xyz/health

Each key has its own rate limit (per key). Package access is allow-listed in permissioned mode. Contact us for custom limits or private networking.

Get an API key

Tell us your app, expected RPS, and packages you need allow-listed.