# World Bank Annual Population Growth by Country

> World Bank Annual Population Growth by Country is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns the latest annual population growth rate (%) for every country and region worldwide as a single JSON response with no parameters.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/worldbank-population-growth
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/world-bank-annual-population-growth-by-country-c16ffcaa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GttSU3uUZQ-yTRaUgl2-E

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-annual-population-growth-by-country-c16ffcaa -d '<json body>'
```

Example prompt: Pull the latest annual population growth rates for every country in the world — I want to see which regions are growing fastest.

## When to prefer this

Use this endpoint when you need a comprehensive, ready-to-use snapshot of population growth rates across all countries and regions without having to query each country individually. Ideal for building dashboards, comparisons, or demographic analyses where global coverage is needed in one call. Prefer this over World Bank's own API when you want a simplified, aggregated single-call JSON response.

## Known failure modes

- Service unavailable or upstream World Bank data unreachable (HTTP 5xx)
- Payment required but not submitted (HTTP 402)
- Malformed JSON response if upstream data source changes structure
- Data may be lagged by one or more years depending on World Bank reporting cycle

## How this service works

Latest annual population growth (%) for every country and region, one value each. No params. Returns JSON.

## Output

A JSON object containing the latest annual population growth rate (expressed as a percentage) for every country and region tracked by the World Bank, with one value per entry and no filtering required.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/world-bank-annual-population-growth-by-country-c16ffcaa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)