# Council of AI — XRPL Issuer Evidence Check (GSPC Board)

> Council of AI — XRPL Issuer Evidence Check (GSPC Board) is a paid API for AI agents from councilof.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Fetches a signed evidence card for an XRPL issued-asset or issuer address, verifying domain linkage and on-chain obligations against the GSPC board.

## Facts

- Endpoint: GET https://councilof.ai/api/rwa/evidence
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/council-of-ai-xrpl-issuer-evidence-check-gspc-board-d9c346fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lem6iA-eOFTCdyBjand56

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-xrpl-issuer-evidence-check-gspc-board-d9c346fd
```

Example prompt: Can you check the Council of AI GSPC board for the XRPL asset USD issued by rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh and tell me whether it passes two-way domain verification and has any on-chain obligations?

## When to prefer this

Use this endpoint when you need to verify the legitimacy and domain linkage of a specific XRPL issued asset or its issuer address against the Council of AI's GSPC board. It is best suited for due-diligence, compliance, or trust-verification workflows involving XRPL tokens or real-world asset issuers. Prefer this over generic blockchain explorers when you need a structured, signed, human-and-machine-readable attestation rather than raw ledger data.

## Known failure modes

- Missing or invalid 'asset' query parameter returns an error or empty response
- Unknown XRPL symbol or issuer r-address that has not been probed returns an empty or stub card
- Domain verification inconclusive due to missing DNS records returns UNCHECKABLE state
- Payment failure (x402 protocol) results in no card being returned
- Rate limiting or upstream XRPL node unavailability may cause transient failures

## 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 signed JSON evidence card conforming to the CSOAI card-v0 schema, containing: the card kind and probe state (e.g. PROBED), decoded account root flags, a subject line summarizing the domain verification result (PASS/FAIL/UNCHECKABLE) and on-chain obligation details, an inputs SHA-256 hash, the surface type (public.notice), any unmeasured fields, and an Ed25519 signature (or null if unsigned). The SHA-256 of the full card payload is also returned.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "asset"
     ],
     "properties": {
      "asset": {
       "type": "string",
       "description": "XRPL issued-asset symbol (see /api/xrpl) or issuer r-address"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "schema": "https://councilof.ai/schema/card-v0.json",
  "sha256": "<hex>",
  "payload": {
   "kind": "csoai.eater.xrpl-issuer/0.1",
   "state": "PROBED",
   "account_root": {
    "flags_decoded": {}
   },
   "inputs_sha256": "<hex>",
   "onchain_obligation": {}
  },
  "subject": "XRPL <SYMBOL> (<issuer>) two-way domain <PASS|FAIL|UNCHECKABLE> + on-chain obligation",
  "surface": "public.notice",
  "unmeasured": [],
  "sig_ed25519": "<hex or null>"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/council-of-ai-xrpl-issuer-evidence-check-gspc-board-d9c346fd/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)