Evaluate an external action in one call

Submit an Action Proposal

First Instinct evaluates it against receiver-owned policy and returns one of four states.

POST /v1/action-proposals

{
  "action_type": "create_refund_request",
  "target": "merchant_refund_workflow",
  "amount": 42,
  "currency": "GBP",
  "idempotency_key": "...",
  "evidence": [...]
}

{
  "decision": "require-human-approval",
  "reason_codes": [
    "SPONSOR_UNVERIFIED",
    "MANDATE_SCOPE_UNVERIFIED"
  ],
  "evaluation_record": "..."
}

The Target issues its own receipt

First Instinct verifies Target Receipts; it does not issue them. The Target signs what it actually did — accepted_for_processing, completed, failed or reversed.

POST /v1/target-receipts

{
  "action_id": "...",
  "outcome": "accepted_for_processing",
  "issuer": "customer_ticketing_system"
}

Shadow Mode

Run evaluation beside a live workflow without blocking, approving or executing anything. Shadow Mode records how the same requests would be classified under the proposed policy, so you can measure exposure before enforcing.

Webhooks

Subscribe to evaluation and Target Receipt events to keep your own systems in sync. Webhook payloads carry the source-attributed evaluation record identifier, never customer credentials.