# jsonwebtoken NPM Package Runtime and Platform Constraints

> jsonwebtoken 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).

Retrieves runtime and platform constraint metadata for the jsonwebtoken npm package, including engine requirements, OS compatibility, and CPU architecture constraints.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/signal-npm-jsonwebtoken-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/jsonwebtoken-npm-package-runtime-and-platform-constraints-66d63b9a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8bOVq9WhM7bv00O2cepmT

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 jsonwebtoken-npm-package-runtime-and-platform-constraints-66d63b9a -d '<json body>'
```

Example prompt: Can you check the runtime and platform constraints for the jsonwebtoken npm package version 9.0.0 — I need to know which Node.js versions and operating systems it supports before I upgrade?

## When to prefer this

Use this endpoint when you need to programmatically check the runtime and platform constraints for jsonwebtoken specifically, especially before upgrading, deploying to a new environment, or validating CI/CD pipeline compatibility. Prefer this over manually reading npm documentation when automating dependency audits or environment checks.

## Known failure modes

- Package name not found in npm registry returns an error or empty result
- Specified version does not exist for the package
- Registry unavailability causes timeout or 5xx error
- Malformed package name or version string rejected by input validation

## How this service works

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

## Output

Returns structured npm registry metadata for jsonwebtoken including engine requirements (e.g. Node.js version ranges), supported operating systems, CPU architecture constraints, and other runtime platform restrictions useful for integration and upgrade planning.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/jsonwebtoken-npm-package-runtime-and-platform-constraints-66d63b9a/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)