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SINT ships first-party SDKs in four languages. All SDKs wrap the same HTTP/SSE gateway API and cover the full protocol surface.

TypeScript

@sint/sdk — primary SDK, full coverage, used in Console and Avatars.

Python

sint-sdk — Python 3.10+, type-hinted, async-first.

Go

github.com/sint-ai/sint-sdk-go — idiomatic Go, context-aware.

Rust

sint-sdk on crates.io — async, serde-friendly, no unsafe.

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Coverage matrix

FeatureTypeScriptPythonGoRust
Token issuance✓✓✓✓
Token delegation✓✓✓✓
Token revocation✓✓✓✓
Intercept✓✓✓✓
Batch intercept✓✓✓—
Approval wait (SSE)✓✓✓✓
Approval resolve✓✓✓✓
Ledger query✓✓✓✓
Ledger verify✓✓✓✓
CSML read✓✓——
LangChain integration✓✓——
OpenClaw integration✓———

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Common patterns

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Async-safe client

All SDKs are thread/goroutine/async-safe. Create one client per process, share across agents.

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Token rotation

Tokens expire. SDKs include a TokenManager that handles automatic rotation: 
const tokenMgr = client.tokenManager({
  refreshBefore: 60_000,  // refresh 60s before expiry
  scope: { resources: ["..."], actions: ["..."] }
});

await tokenMgr.ensureValid();
const token = tokenMgr.current();

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Approval waiting

The approvals.await() helper wraps the SSE endpoint: 
const approval = await client.approvals.await(approvalId, {
  timeout: 30000,
  onUpdate: (event) => console.log("Status:", event.status)
});

if (approval.resolved === "approved") {
  // Proceed
}

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Stability

  • TypeScript SDK: stable. Semantic versioning within the monorepo’s version.
  • Python, Go, Rust SDKs: beta. May have breaking changes until v1.0.
  • Gateway API: versioned at /v1/. Breaking changes increment the major version and are announced in the changelog.

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Contributing

SDK contributions welcome. See contributing.