Get a SIWA nonce for agent sign-in (body: address, agentId, agentRegistry?). Requires RECEIPT_SECRET, SIWA_RPC_URL. Call syra_spend_siwa_nonce via Syra MCP with USDC x402 pay-per-call. No per-vendor API keys.
syra_spend_siwa_nonce — Get a SIWA nonce for agent sign-in (body: address, agentId, agentRegistry?). Requires RECEIPT_SECRET, SIWA_RPC_URL.
Part of Syra Machine Money for Agents. Spend routes settle USDC via HTTP 402; install once via MCP and call tools without per-vendor API keys.
What this tool does
Get a SIWA nonce for agent sign-in (body: address, agentId, agentRegistry?). Requires RECEIPT_SECRET, SIWA_RPC_URL.. Agents invoke it as syra_spend_siwa_nonce through @syra-ai/mcp-server (curated profile) or the escape hatch syra_call_tool with toolId: "siwa-nonce".
Install and call
claude mcp add syra -- npx -y @syra-ai/mcp-server@latest
# Then ask your agent to call:
# syra_spend_siwa_nonce
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