API reference · Trust Fabric

Mint a short-lived agent delegation token

POST /fabric/identity/agent-tokens

Last reviewed 2026-10-02

POST /fabric/identity/agent-tokens

Delegates to the agent-id service, which owns the signing key. This endpoint exists so agent delegation lives in the same Identity namespace as everything else, not so the Fabric can re-implement token signing.

Request body

AgentTokenRequest (required)

Field	Type	Meaning
`agent_id` required	string	min length `1` · max length `255`
`scopes` required	array of string	min items `1`
`ttl_seconds`	integer	min `1.0` · max `3600.0` · default `900`
`chain`	array of string

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

Your API key X-API-Key Remember the key in this tab onlyRequest body application/json

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/identity/agent-tokens' \
  -H "X-API-Key: $CAIN_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"agent_id": "agent-id", "scopes": ["scopes"], "ttl_seconds": 900}'

import json, os, urllib.request

req = urllib.request.Request('https://cainstudio.online/fabric/identity/agent-tokens', method='POST',
    headers={"X-API-Key": os.environ["CAIN_API_KEY"], "Content-Type": "application/json"},
    data=json.dumps({
      "agent_id": "agent-id",
      "scopes": [
        "scopes"
      ],
      "ttl_seconds": 900
    }).encode())
with urllib.request.urlopen(req, timeout=60) as r:
    print(r.status, json.load(r))

const res = await fetch("https://cainstudio.online/fabric/identity/agent-tokens", {
  method: "POST",
  headers: {
    "X-API-Key": process.env.CAIN_API_KEY!,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "agent_id": "agent-id",
    "scopes": [
      "scopes"
    ],
    "ttl_seconds": 900
  }),
});
console.log(res.status, await res.json());

Schemas used

AgentTokenRequest · HTTPValidationError · ValidationError

← Who has read this tenant's evidence · all 79 Trust Fabric calls · Verify an agent delegation token →

Try CAIN-42 on your own agents

Create a free account and every new account starts with a 7-day trial of the full platform. Or try the sandbox first, with no account at all.

Create a free account → · Try the sandbox · See the whole ecosystem