API reference · Credential broker

CAIN decides on the call, then makes it with the stored credential

POST /fabric/broker/call

Last reviewed 2026-11-06

POST /fabric/broker/call

Request body

CallRequest (required)

Field	Type	Meaning
`credential` required	string	min length `1` · max length `63`
`method`	string	default `"GET"`
`url` required	string	min length `8` · max length `4000`
`headers`	map of string to string
`json`	any or null
`body`	string or null	max length `1000000`
`agent_id`	string or null	max length `200`

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 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/broker/call' \
  -H "X-API-Key: $CAIN_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"credential": "credential", "method": "GET", "url": "url"}'

import json, os, urllib.request

req = urllib.request.Request('https://cainstudio.online/fabric/broker/call', method='POST',
    headers={"X-API-Key": os.environ["CAIN_API_KEY"], "Content-Type": "application/json"},
    data=json.dumps({
      "credential": "credential",
      "method": "GET",
      "url": "url"
    }).encode())
with urllib.request.urlopen(req, timeout=60) as r:
    print(r.status, json.load(r))

const res = await fetch("https://cainstudio.online/fabric/broker/call", {
  method: "POST",
  headers: {
    "X-API-Key": process.env.CAIN_API_KEY!,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "credential": "credential",
    "method": "GET",
    "url": "url"
  }),
});
console.log(res.status, await res.json());

Schemas used

CallRequest · Error · HTTPValidationError · ValidationError

all 4 Credential broker calls · Brokered credentials (the secrets are never returned) →

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