# GoCreative Pregnancy Due Date Calculator

> GoCreative Pregnancy Due Date Calculator is a paid API for AI agents from api.gocreativeai.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-09).

Calculates the estimated pregnancy due date from a last menstrual period (LMP) date using Naegele's rule, returning trimester and gestational age details

## Facts

- Endpoint: GET https://api.gocreativeai.com/v1/calc/due-date/%7Barg%7D
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-09
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gocreative-pregnancy-due-date-calculator-1cfd5414
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_itnAGOPTnf-vhiiqx124J

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 gocreative-pregnancy-due-date-calculator-1cfd5414
```

Example prompt: My last menstrual period started on March 3, 2025 — can you calculate my pregnancy due date and tell me what trimester I'm in?

## When to prefer this

Use this endpoint when you need a quick, accurate pregnancy due date estimate based on the last menstrual period date using the standard Naegele's rule method. Prefer this over general health APIs when you specifically need gestational age breakdown and trimester classification with no signup or API key required.

## Known failure modes

- Invalid date format returns an error — must be YYYY-MM-DD
- Missing required 'input' query parameter returns 400
- Future LMP dates may return unexpected or invalid gestational ages
- Dates far in the past may produce nonsensical trimester values

## How this service works

Keyless, pay-per-call compliance & regulated-data API for AI agents — OFAC wallet + sanctions/PEP + KYB screening, SEC filings, FRED economics, FDA recalls, federal awards, plus continuous monitoring. USDC on Base/Solana via x402, native MCP. No API key, no signup.

## Output

Returns the estimated due date, trimester (first/second/third), gestational age in days and weeks, the LMP date used, the as-of date, and the calculation method (Naegele's rule).

## Example request

```json
{
 "arg": "2024-01-15",
 "days": 30
}
```

## 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"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "input"
     ],
     "properties": {
      "input": {
       "type": "string",
       "description": "endpoint argument"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gocreative-pregnancy-due-date-calculator-1cfd5414/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.gocreativeai.com](https://www.zero.xyz/host/api.gocreativeai.com/llms.txt)