API reference · CAIN Budget
Evaluate Budget
POST /fabric/budgets/evaluate
Last reviewed 2026-10-02
POST /fabric/budgets/evaluate
Evaluate if an action is allowed under budget constraints.
Request body
EvaluateRequest (required)
| Field | Type | Meaning |
|---|---|---|
amount_cents required | number | > 0.0 |
action required | string | min length 1 |
scope | string | default "tenant" |
scope_id | string or null | |
trajectory_id | string or null | |
identity_id | string or null | |
agent_id | string or null | |
trace_id | string or null |
Responses
| Status | Meaning | Body |
|---|---|---|
200 | Successful Response | JSON |
422 | Validation Error | HTTPValidationError |
401 | No key, or a key that is not valid | JSON detail |
429 | Rate limit for your plan reached; retry after the Retry-After seconds | JSON 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/budgets/evaluate' \
-H "X-API-Key: $CAIN_API_KEY" \
-H 'Content-Type: application/json' \
-d '{"amount_cents": 1.0, "action": "action", "scope": "tenant"}'import json, os, urllib.request
req = urllib.request.Request('https://cainstudio.online/fabric/budgets/evaluate', method='POST',
headers={"X-API-Key": os.environ["CAIN_API_KEY"], "Content-Type": "application/json"},
data=json.dumps({
"amount_cents": 1.0,
"action": "action",
"scope": "tenant"
}).encode())
with urllib.request.urlopen(req, timeout=60) as r:
print(r.status, json.load(r))const res = await fetch("https://cainstudio.online/fabric/budgets/evaluate", {
method: "POST",
headers: {
"X-API-Key": process.env.CAIN_API_KEY!,
"Content-Type": "application/json",
},
body: JSON.stringify({
"amount_cents": 1.0,
"action": "action",
"scope": "tenant"
}),
});
console.log(res.status, await res.json());Schemas used
HTTPValidationError · ValidationError · EvaluateRequest
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