# Council of AI — RAS USDC Token Supply Lookup

> Council of AI — RAS USDC Token Supply Lookup is a paid API for AI agents from councilof.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).

Fetches the on-chain USDC token supply for a specified EVM ledger with cryptographically signed, state-proof-verified evidence

## Facts

- Endpoint: GET https://councilof.ai/api/ras/supply?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/council-of-ai-ras-usdc-token-supply-lookup-41b9ecb6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cdquKr11UO3glfuQm9oSz

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-ras-usdc-token-supply-lookup-41b9ecb6
```

Example prompt: Can you get me the current verified USDC supply on Base, with a signed state-proof receipt I can independently verify?

## When to prefer this

Choose this endpoint when you need an independently verifiable, cryptographically signed snapshot of USDC token supply on a specific EVM chain. It is superior to generic blockchain RPC calls because it provides state-proof verification, a signed receipt, and an auditable evidence classification — making it suitable for compliance, auditing, or trust-sensitive financial monitoring workflows. Prefer this over unattested oracle or operator-API data sources when proof integrity matters.

## Known failure modes

- Unsupported ledger value returns an enum validation error
- Unsupported asset value (non-USDC) rejected at schema level
- Evidence kind returned as REJECTED if on-chain proof cannot be verified
- Missing required query parameters (asset or ledger) cause request failure
- Network or RPC issues on the target chain may cause stale or unavailable data
- Ed25519 signature field may be null for unsigned supporting runs

## How this service works

We measure how AI systems behave against frozen, published tests and publish checkable evidence. Issued measurement cards are signed; unsigned supporting runs are labelled. Read the live board and corrections ledger.

## Output

Returns a JSON object containing: the kind of measurement (csoai.ras.supply-read/0.1), proof verification flags (account_proof_verified, storage_proof_verified), the block height and state root at which the measurement was taken, the USDC supply in base units with decimal precision, the evidence kind (STATE_PROOF_VERIFIED, OPERATOR_API, or REJECTED), and a signed receipt with SHA-256 hash and optional Ed25519 signature for independent verification.

## 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",
      "ledger"
     ],
     "properties": {
      "asset": {
       "enum": [
        "USDC"
       ],
       "type": "string",
       "description": "asset whose issuer publishes a deployment list the reader parses"
      },
      "ledger": {
       "enum": [
        "ethereum",
        "arbitrum",
        "avalanche",
        "base",
        "celo",
        "hyperevm",
        "linea",
        "optimism",
        "polygon",
        "sonic",
        "unichain",
        "zksync"
       ],
       "type": "string",
       "description": "EVM ledger named on the issuer's list"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "kind": "receipt",
  "result": {
   "kind": "csoai.ras.supply-read/0.1",
   "proof": {
    "account_proof_verified": true,
    "storage_proof_verified": true
   },
   "height": {
    "number": "<int>",
    "state_root": "<0x…>"
   },
   "supply": {
    "decimals": 6,
    "base_units": "<int>"
   },
   "evidence_kind": "STATE_PROOF_VERIFIED | OPERATOR_API | REJECTED"
  },
  "schema": "csoai.ras.supply/0.1",
  "receipt": {
   "sha256": "<hex>",
   "sig_ed25519": "<hex or null>"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/council-of-ai-ras-usdc-token-supply-lookup-41b9ecb6/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)