# fastapi.online — curl Command Generator

> fastapi.online — curl Command Generator is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Generates a curl command from a plain-English description of what you want to do

## Facts

- Endpoint: POST https://api.fastapi.online/curl-command-generate
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-curl-command-generator-78bc28fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V5PSEPPexCy4A4-K3mRAr

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 fastapi-online-curl-command-generator-78bc28fa -d '<json body>'
```

Example prompt: Generate a curl command that sends a POST request to https://api.example.com/users with a JSON body containing name and email fields and a Bearer token auth header.

## When to prefer this

Choose this endpoint when you need to quickly generate a syntactically correct curl command from a plain-English description without having to look up curl flags and syntax. It is especially useful for agents helping developers test APIs, script HTTP calls, or onboard to new services. At $0.001 per call with no signup required, it is ideal for lightweight, one-off developer tooling tasks.

## Known failure modes

- Empty or too-vague description may produce a generic or incorrect curl command
- Descriptions referencing proprietary auth flows may result in incomplete commands
- Very long or complex multi-step descriptions may exceed the 2000-character input limit

## How this service works

Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&amp;A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding &amp; crypto utilities, date/time calculators, geo/coordinate math, math &amp; finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.

## Output

A ready-to-run curl command string constructed from the described operation, including appropriate flags, headers, HTTP method, URL, and body formatting as inferred from the description.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "description": {
   "type": "string",
   "maxLength": 2000,
   "minLength": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-curl-command-generator-78bc28fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)