siwa
// SIWA (Sign-In With Agent) authentication for ERC-8004 registered agents.
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stars:953
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updated:March 4, 2026
SKILL.mdreadonly
SKILL.md Frontmatter
namesiwa
version0.2.0
descriptionSIWA (Sign-In With Agent) authentication for ERC-8004 registered agents.
metadata[object Object]
SIWA SDK
Sign-In With Agent (SIWA) lets AI agents authenticate with services using their ERC-8004 onchain identity.
Install
npm install @buildersgarden/siwa
Skills
Agent-Side (Signing)
Choose based on your wallet provider:
- Bankr — Bankr Agent API wallets
Server-Side (Verification)
- Server-Side Verification — Next.js, Express, Hono, Fastify
SDK Modules
| Import | Description |
|---|---|
@buildersgarden/siwa | Core: signSIWAMessage, verifySIWA, createSIWANonce |
@buildersgarden/siwa/signer | Signer factories |
@buildersgarden/siwa/erc8128 | ERC-8128 HTTP signing/verification |
@buildersgarden/siwa/receipt | HMAC receipt helpers |
@buildersgarden/siwa/nonce-store | Nonce stores (Memory, Redis, KV) |
@buildersgarden/siwa/next | Next.js middleware |
@buildersgarden/siwa/express | Express middleware |
@buildersgarden/siwa/hono | Hono middleware |
@buildersgarden/siwa/fastify | Fastify middleware |