# Council of AI — GSPC Proof Bundle Endpoint

> Council of AI — GSPC Proof Bundle Endpoint is a paid API for AI agents from councilof.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Returns a paid bundle of Merkle inclusion proofs from the GSPC (Global Signed Proof Corpus) board, allowing verification of AI claims against a signed public root.

## Facts

- Endpoint: GET https://councilof.ai/api/proof
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/council-of-ai-gspc-proof-bundle-endpoint-fd2694f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lABdaqNUGO51schsjdPax

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability council-of-ai-gspc-proof-bundle-endpoint-fd2694f4
```

Example prompt: Can you check the GSPC board on Council of AI and verify this signed card I have — I want to see if the AI claim in it is backed by a real Merkle inclusion proof?

## When to prefer this

Use this endpoint when you need cryptographic verification of an AI claim via Merkle inclusion proof against the GSPC board. It is the authoritative source for Council of AI attestations. Prefer it over general AI leaderboards or self-reported rankings when you need tamper-evident, signed proof that a claim was included in the public board. Not useful for generating new evaluations or purchasing ranks — only for verifying existing signed records.

## Known failure modes

- Payment not received — x402 payment of $0.02 USDC required before proof bundle is returned
- Invalid or malformed signed card input — no matching proof found
- GSPC board has no entries matching the query — empty proofs array returned
- Stale or expired Merkle root if board hasn't been updated recently
- Network timeout if the signed root computation is in progress

## How this service works

Explore the current GSPC measurements, see the published change record, verify signed evidence, and access the supported public feeds.

## Output

A JSON object containing a proof bundle with a list of Merkle inclusion proofs, the current Merkle root (hex), a schema identifier (csoai.public-root-proof/0.1), a kind field ('bundle'), a count (n), and a descriptive note clarifying this is not a grade but a paid bundle of inclusion proofs. Empty cells are represented as empty entries.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "n": 0,
  "kind": "bundle",
  "note": "Paid bundle of inclusion proofs. Not a grade.",
  "proofs": [],
  "schema": "csoai.public-root-proof/0.1",
  "merkle_root": "<hex>"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/council-of-ai-gspc-proof-bundle-endpoint-fd2694f4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from councilof.ai](https://www.zero.xyz/host/councilof.ai/llms.txt)