# Clink Forge NCHS Births and General Fertility Rates Lookup

> Clink Forge NCHS Births and General Fertility Rates Lookup is a paid API for AI agents from api.clinkforge.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).

Retrieves NCHS (National Center for Health Statistics) birth counts and general fertility rate data for the United States by record ID, with cryptographic Ed25519 attestation on every response.

## Facts

- Endpoint: GET https://api.clinkforge.com/v1/p/auto-nchs-births-and-general-fertility-rates-united-states-lookup
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/clink-forge-nchs-births-and-general-fertility-rates-lookup-047b3e8e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pwMViEz4Q4wWZ9as1PRdO

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 clink-forge-nchs-births-and-general-fertility-rates-lookup-047b3e8e
```

Example prompt: Pull the NCHS births and general fertility rates record with ID 'us-births-2020-total' from Clink Forge — I need the fertility rate figures with the cryptographic attestation so I can confirm the data came from official government sources.

## When to prefer this

Choose this endpoint when you need US birth and fertility rate statistics sourced directly from NCHS/CDC government data with cryptographic proof of provenance — ideal for research, auditing, or automated pipelines where data integrity and attestation matter. Prefer this over generic data APIs when you need pay-per-call access with no account or API key setup, and when cryptographic provenance (Ed25519 attestation) is required for compliance or trust verification.

## Known failure modes

- Invalid or unknown record ID returns an error or empty result
- Record ID exceeds 200-character limit and is rejected
- Payment of $0.01 USDC not fulfilled via x402 protocol results in 402 Payment Required
- Network timeout or service unavailability
- Ed25519 attestation verification failure on client side if signature mismatch

## How this service works

Clink Forge raw data product 'auto-nchs-births-and-general-fertility-rates-united-states-lookup': pay-per-call government data with a provenance chain and an Ed25519 attestation on every response.

## Output

Returns structured birth count and general fertility rate data sourced from NCHS/CDC government records, accompanied by a cryptographic Ed25519 signature attesting to data provenance and integrity. The response includes the requested statistical record identified by ID, along with a full provenance chain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "id"
     ],
     "properties": {
      "id": {
       "type": "string",
       "maxLength": 200
      }
     },
     "additionalProperties": false
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/clink-forge-nchs-births-and-general-fertility-rates-lookup-047b3e8e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.clinkforge.com](https://www.zero.xyz/host/api.clinkforge.com/llms.txt)