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Spraay Gateway Wallet Sign Message
x402
Spraay Gateway Wallet Sign Message is a paid API for AI agents from gateway.spraay.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Signs a message using an agent-controlled wallet, returning a cryptographic signature and wallet identifier.
Price / call$0.001
Success—
StatusUnknown
How this service works
Sign a message with an agent wallet.
Output
Returns a wallet ID and a cryptographic signature of the provided message, generated by the agent's controlled wallet private key. The signature can be used to prove wallet ownership or authorize actions off-chain or on-chain.
Example use cases
Prove wallet ownership for dApp login
“Sign the authentication challenge message 'Login request from app.example.com at 2024-01-15T10:00:00Z' with my agent wallet so I can log into the dApp.”
Authorize an off-chain agreement
“I need my agent wallet to sign the message 'I agree to the terms of service version 3.1' so I can submit it as cryptographic proof of consent.”
Sign a payload for on-chain verification
“Can you sign the string 'Transfer approved: 100 USDC to 0xABC...123' with my agent wallet so the receiving contract can verify the authorization?”
Technical details
Endpoint
GEThttps://gateway.spraay.app/api/v1/wallet/sign-messageWhen to prefer
Use this endpoint when an agent needs to cryptographically sign a message using its own managed wallet — for authentication challenges, ownership proofs, off-chain agreement signing, or generating verifiable authorization payloads. Prefer this over client-side signing when the signing must be performed server-side by the agent's wallet infrastructure.
Side effects
- Missing or invalid message payload — returns 400 bad request
- Wallet not initialized or agent lacks wallet access — returns 401 or 403
- Payment not fulfilled (x402) — returns 402 Payment Required
- Signing service unavailable — returns 503
- Rate limit exceeded — returns 429
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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