# fastify NPM Package Runtime and Platform Constraints

> fastify NPM Package Runtime and Platform Constraints is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Returns runtime and platform compatibility constraints for the fastify npm package, including engine requirements, OS support, and integration metadata for upgrade planning.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/signal-npm-fastify-runtime-constraints?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastify-npm-package-runtime-and-platform-constraints-dda69a2c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-96-DxadkRe0ftbkyHFkF

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 fastify-npm-package-runtime-and-platform-constraints-dda69a2c -d '<json body>'
```

Example prompt: What are the runtime and platform constraints for fastify version 4.x? I need to know which Node.js versions and operating systems it supports before planning our upgrade.

## When to prefer this

Use this endpoint when you need programmatic, structured access to fastify's npm registry runtime constraints — especially for automated upgrade planning, CI/CD validation, or dependency auditing workflows where you need engine and platform metadata without manually parsing the npm registry.

## Known failure modes

- Invalid or non-existent package name returns an error
- Requested version does not exist in the npm registry
- Registry metadata unavailable or incomplete for the specified version
- Network timeout reaching the npm registry
- Package name exceeds 150 character limit

## How this service works

fastify Runtime and platform constraints: Runtime and platform constraints for npm package fastify. Inspect registry metadata for integration and upgrade planning. Package and version can be overridden.

## Output

Structured metadata about the fastify npm package's runtime and platform constraints, including supported Node.js engine versions, compatible operating systems, and any other registry-level integration and compatibility signals useful for upgrade or deployment planning.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "package": {
   "type": "string",
   "default": "fastify",
   "maxLength": 150
  },
  "version": {
   "type": "string",
   "maxLength": 100
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastify-npm-package-runtime-and-platform-constraints-dda69a2c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)