# Orders of Magnitude API – Namespace Validate

> Orders of Magnitude API – Namespace Validate is a paid API for AI agents from x402-api-production-5133.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Validates an input string against a namespace schema or rule set via the x402 micropayment protocol

## Facts

- Endpoint: GET https://x402-api-production-5133.up.railway.app/ns/validate
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orders-of-magnitude-api-namespace-validate-29bd2629
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8yGAccOAQuZfhIdZsZX2B

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 orders-of-magnitude-api-namespace-validate-29bd2629
```

Example prompt: Can you validate this string 'user:alice@example.com' against the namespace rules using the Orders of Magnitude validator?

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call input validation via the x402 micropayment protocol and do not want to maintain a validation service yourself. Best suited for single-string namespace checks where a $0.01 USDC per-call cost is acceptable. Avoid if you need bulk validation, complex schema validation beyond strings, or cannot use the x402 payment protocol.

## Known failure modes

- Missing required 'input' parameter returns 400 error
- Input string exceeds length limits
- Payment not received or x402 protocol handshake fails resulting in 402 Payment Required
- Empty string input may return validation error
- Network timeout on Railway-hosted service
- Ambiguous or empty response schema may make result interpretation difficult

## How this service works

Data and AI services via x402 payment protocol

## Output

Returns a JSON object indicating whether the provided input string passes namespace validation rules, potentially including error details or status codes describing why a value is invalid.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orders-of-magnitude-api-namespace-validate-29bd2629/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-api-production-5133.up.railway.app](https://www.zero.xyz/host/x402-api-production-5133.up.railway.app/llms.txt)