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siwa-circle

Automate SIWA signing with Circle wallets for agent identity across Next.js, Express, Hono, and Fastify.

43|12|Updated Feb 4, 2026
Search Tags:#authentication#wallet#signer#onchain#circle#erc-8004#siwa
One-click install
npx skills add https://github.com/builders-garden/siwa --skill siwa-circle
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: siwa-circle
Source: https://github.com/builders-garden/siwa/tree/main/packages/siwa-website/public/skills/circle
Command: npx skills add https://github.com/builders-garden/siwa --skill siwa-circle

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Circle-based SIWA integrations simplify proving agent identity by delegating signing to Circle's developer-controlled wallets, reducing the risk and burden of managing private keys directly.

Core Features & Use Cases

  • Circle-based signer: manage SIWA message signing through Circle, enabling centralized wallet control for agents.
  • On-chain identity registration: register ERC-8004 agent identities via Circle's contract execution API.
  • Framework integration: works with Next.js, Express, Hono, and Fastify SIWA bindings.

Quick Start

Install the Circle SIWA signer and configure with Circle API keys to initialize the signer.

Frequently Asked Questions about siwa-circle

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I automate SIWA signing with Circle wallets to prove agent identity?▼

Automating SIWA signing with Circle wallets is achieved by delegating cryptographic signing to Circle's developer-controlled wallets. This proves agent identity without managing private keys directly, streamlining end-to-end authentication.

Can I use Circle SIWA signing with Next.js, Express, Hono, and Fastify?▼

Yes, Circle SIWA signing works with Next.js, Express, Hono, and Fastify. The skill provides framework integration bindings to wire Circle's developer wallets SDK across these server-side and client-side workflows.

How do I register ERC-8004 agent identities using Circle wallets?▼

Registering ERC-8004 agent identities is done through Circle's contract execution API. This on-chain identity registration process maps your agent identity securely using Circle-backed wallet infrastructure.

What is the best way to manage private keys for SIWA authentication?▼

Using Circle-based signers for SIWA authentication is a strong alternative to managing private keys directly. It centralizes wallet control for agents, reducing risk and operational burden by delegating signing to Circle.

Do I need Circle API keys to initialize the SIWA signer?▼

Yes, Circle API keys are required to initialize the SIWA signer. You must install the Circle SIWA signer package and configure it with your API keys to start automating message signing.

Why use Circle developer-controlled wallets for on-chain agent identity?▼

Circle developer-controlled wallets simplify proving on-chain agent identity by centralizing wallet control. This approach reduces the security risks associated with handling private keys directly during ERC-8004 interactions.

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