# Stable Financial – Supported Central Bank Codes

> Stable Financial – Supported Central Bank Codes is a paid API for AI agents from stable-financial.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns the list of supported central bank codes (e.g. FED, ECB, BOJ) available for interest rate queries.

## Facts

- Endpoint: GET https://stable-financial.vercel.app/api/macro/interest-rates/banks
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stable-financial-vercel-app-8b10af6c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UlekHPBIjwLWijYom4tCx

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 stable-financial-vercel-app-8b10af6c
```

Example prompt: What central bank codes are supported for interest rate queries — things like FED, ECB, BOJ — so I can figure out which ones I can look up?

## When to prefer this

Use this endpoint when you need to discover which central bank codes are valid inputs before querying specific policy interest rates. This is the canonical enumeration/discovery endpoint for the stable-financial macro interest rates API — prefer it over hardcoding bank codes or guessing valid identifiers.

## Known failure modes

- Service unavailable returns 5xx with no bank list
- Payment required (402) if x402 micropayment not attached
- Empty or malformed response if provider data is stale

## How this service works

Supported central bank codes (FED, ECB, BOJ, etc.).

## Output

Returns a JSON object containing an array of supported central bank code strings (e.g. ['FED', 'ECB', 'BOJ', ...]) and optionally a resource identifier. Useful for discovering valid bank codes before querying specific policy rates.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "properties": {},
     "description": "No query parameters.",
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "banks"
     ],
     "properties": {
      "banks": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "resource": {
       "type": "string"
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stable-financial-vercel-app-8b10af6c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stable-financial.vercel.app](https://www.zero.xyz/host/stable-financial.vercel.app/llms.txt)