API reference · Trust Fabric

The latest proof run: every claim, executed

GET /fabric/proof

Last reviewed 2026-10-02

GET /fabric/proof

Public and unauthenticated, deliberately.

The point of this surface is that a sceptical engineer who has never met us can check it. Putting it behind a credential would defeat the exercise.

Nothing here is tenant data: the checks run against synthetic tenants that are deleted afterwards, so publishing the results discloses nothing about anyone.

Responses

Status	Meaning	Body
`200`	Successful Response	JSON
`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 only

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 GET 'https://cainstudio.online/fabric/proof' \
  -H "X-API-Key: $CAIN_API_KEY"

import json, os, urllib.request

req = urllib.request.Request('https://cainstudio.online/fabric/proof', method='GET',
    headers={"X-API-Key": os.environ["CAIN_API_KEY"]})
with urllib.request.urlopen(req, timeout=60) as r:
    print(r.status, json.load(r))

const res = await fetch("https://cainstudio.online/fabric/proof", {
  method: "GET",
  headers: {
    "X-API-Key": process.env.CAIN_API_KEY!,
  },
});
console.log(res.status, await res.json());

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