CAIN-42 CAIN Studio

API reference · CAIN Guard

Check Nonce

POST /fabric/guard/a2a/nonce/check

Last reviewed 2026-10-02

POST /fabric/guard/a2a/nonce/check

Check nonce for replay protection.

Request body

A2ANonceRequest (required)

FieldTypeMeaning
agent_id requiredstring
nonce requiredstring
timestamp requirednumber

Responses

StatusMeaningBody
200Successful ResponseJSON
422Validation ErrorHTTPValidationError
401No key, or a key that is not validJSON detail
429Rate limit for your plan reached; retry after the Retry-After secondsJSON detail

Try it

This call changes data in the account the key belongs to.

The request goes from your browser straight to this site. Your key is not stored unless you tick the box, and then only in this tab's session storage.

Code

curl -sS -X POST 'https://cainstudio.online/fabric/guard/a2a/nonce/check' \
  -H "X-API-Key: $CAIN_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"agent_id": "agent-id", "nonce": "nonce", "timestamp": 1.0}'

Schemas used

A2ANonceRequest · HTTPValidationError · ValidationError

← Check Drift · all 10 CAIN Guard calls · Observe Capability →

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