# Council of AI — SWIFT Population Slice

> Council of AI — SWIFT Population Slice is a paid API for AI agents from councilof.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Returns a signed, verifiable population slice of SWIFT-sourced bank rows with attestation metadata for independent AI measurement verification

## Facts

- Endpoint: GET https://councilof.ai/api/pop/swift?utm_source=zero.xyz
- Price: $0.01/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-swift-population-slice-0ae22f96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f2N6s7Gw-PR_cKqnyaRAi

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-swift-population-slice-0ae22f96
```

Example prompt: Pull the Council of AI SWIFT population slice — I need the signed attestation card with the SHA-256 hash and row count so I can independently verify their bank census data.

## When to prefer this

Choose this endpoint when you need cryptographically attested, independently verifiable SWIFT bank population data with a signed measurement card. Prefer it over raw census files when auditability, non-repudiation (Ed25519 signature), and chain-of-custody (settlement info) are required. Especially useful for AI evaluation pipelines needing frozen, reproducible population snapshots tied to a specific as-of date.

## Known failure modes

- Payment not received — returns 402 if USDC payment not included
- Invalid HTTP method — only GET/HEAD/DELETE accepted per schema enum
- Attestation signature may be null if run is unsigned (labelled as supporting, not issued)
- Data not yet indexed — state field may reflect non-INDEXED status
- Source file unavailable — /interop/swift-census.json missing or stale
- Network/facilitator connectivity failure returning 5xx

## 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 SWIFT population slice with: slice ID ('swift'), row count (n), verbatim population rows, as-of date, indexing state, unit description, schema version, settlement info (payer, network, transaction), source file reference, and a full attestation object including schema URL, SHA-256 hash, payload kind, surface label, and optional Ed25519 signature.

## 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"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "n": 26,
  "id": "swift",
  "kind": "slice",
  "rows": "<the population rows / artifact bytes, verbatim>",
  "as_of": "2026-09-01",
  "state": "INDEXED",
  "n_unit": "sourced bank rows (three-state; identity = a dated press URL, hashed)",
  "schema": "csoai.population-door/0.1",
  "settle": {
   "payer": "<0x… or null>",
   "network": "<caip2 or null>",
   "transaction": "<0x… or null>"
  },
  "source": [
   "/interop/swift-census.json"
  ],
  "attestation": {
   "schema": "https://councilof.ai/schema/card-v0.json",
   "sha256": "<hex>",
   "payload": {
    "kind": "csoai.population.slice/0.1",
    "rows_sha256": "<hex>"
   },
   "surface": "population.slice",
   "sig_ed25519": "<hex or null>"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/council-of-ai-swift-population-slice-0ae22f96/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)