API reference · Trust Fabric

Let one agent's already-allowed calls to these tools skip the per-call consensus round

POST /fabric/agent-keys/{agent_key_id}/fast-path

Last reviewed 2026-11-06

POST /fabric/agent-keys/{agent_key_id}/fast-path

Parameters

Name	In	Type	Meaning
`agent_key_id` required	path	string

Request body

FastPathGrantRequest (required)

Field	Type	Meaning
`tools` required	array of string	Paths the agent calls, e.g. /tools/read_file. A trailing / covers that subtree. No wildcards. min items `1` · max items `64`
`service`	string or null	Leave empty for your own tools (calls that name no service). max length `256`
`ttl_s`	integer	Snapshot lifetime; the cluster re-commits it at half-life while the grant lasts. min `5.0` · max `900.0` · default `120`

Responses

Status	Meaning	Body
`200`	Successful Response	JSON
`401`	The X-API-Key header is missing, or the key is unknown, revoked or replaced.	`Error`
`403`	The key is valid but may not do this (for example an agent key approving its own held action).	`Error`
`422`	Validation Error	`HTTPValidationError`
`429`	Rate limit or monthly quota reached. Wait for the number of seconds in Retry-After when it is sent.	`Error`

Try it

Your API key X-API-Key Remember the key in this tab onlyagent_key_id pathRequest 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/agent-keys/<agent_key_id>/fast-path' \
  -H "X-API-Key: $CAIN_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"tools": ["tools"], "ttl_s": 120}'

import json, os, urllib.request

req = urllib.request.Request('https://cainstudio.online/fabric/agent-keys/<agent_key_id>/fast-path', method='POST',
    headers={"X-API-Key": os.environ["CAIN_API_KEY"], "Content-Type": "application/json"},
    data=json.dumps({
      "tools": [
        "tools"
      ],
      "ttl_s": 120
    }).encode())
with urllib.request.urlopen(req, timeout=60) as r:
    print(r.status, json.load(r))

const res = await fetch("https://cainstudio.online/fabric/agent-keys/<agent_key_id>/fast-path", {
  method: "POST",
  headers: {
    "X-API-Key": process.env.CAIN_API_KEY!,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "tools": [
      "tools"
    ],
    "ttl_s": 120
  }),
});
console.log(res.status, await res.json());

Schemas used

Error · FastPathGrantRequest · HTTPValidationError · ValidationError

← Create an agent key (a separate principal for one agent) · all 81 Trust Fabric calls · Remove an agent's fast-path grant immediately →

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Let one agent&#x27;s already-allowed calls to these tools skip the per-call consensus round