# World Bank Population Density Time Series (Suverse Proxy)

> World Bank Population Density Time Series (Suverse Proxy) is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.07/call, status unknown (last checked 2026-10-16).

Returns a yearly population density time series for any country by ISO code, sourced from World Bank Open Data, with no API key required.

## Facts

- Endpoint: POST https://proxy.suverse.io/v1/data/suverse-wb-pop-density?utm_source=zero.xyz
- Price: $0.07/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/world-bank-population-density-time-series-suverse-proxy-4b3364c7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_y1nJhSOofEIJbIo9jKJGi

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 world-bank-population-density-time-series-suverse-proxy-4b3364c7 -d '<json body>'
```

Example prompt: Pull the full yearly population density time series for Japan (ISO code JPN) from the World Bank — I want to see how it's changed over the decades.

## When to prefer this

Choose this endpoint when you need historical, yearly population density data from a trusted multilateral source (World Bank) for any country, without needing to obtain or manage an API key. It is ideal for macro, demographic, and cross-country analysis workflows where agents need standardized, comparable density figures over time. Prefer it over raw World Bank API calls when you want a proxied, agent-friendly interface with x402 micropayment support and no authentication overhead.

## Known failure modes

- Invalid or unrecognized ISO country code returns an error or empty dataset
- Country has no World Bank data available for certain years, resulting in null or missing values
- Malformed request body causes a 400-level error
- Payment of $0.07 USDC not fulfilled causes a 402 Payment Required response
- World Bank upstream data unavailability may cause a 503 or timeout

## How this service works

Population Density for any country by ISO code as a yearly World Bank Open Data time series, no key. Returns country, year, and value. For AI agents doing macro, demographic, and cross country analysis.

## Output

Returns a structured time series with the country name, ISO code, and a list of year-value pairs representing population density (people per square kilometer) as reported by the World Bank Open Data dataset.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/world-bank-population-density-time-series-suverse-proxy-4b3364c7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proxy.suverse.io](https://www.zero.xyz/host/proxy.suverse.io/llms.txt)