# Vextorium Base Numerica – Integer Base Converter

> Vextorium Base Numerica – Integer Base Converter is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-16).

Converts signed integers of any size between bases 2–36 (binary, octal, decimal, hex, base32, base36) with bit/byte length and two's complement, accepting 0x/0b/0o prefixes.

## Facts

- Endpoint: POST https://api.vextorium.com/base-numerica-pago?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-base-numerica-integer-base-converter-e4509b33
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4yreIaDMwEJLoJvm7NkOX

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 vextorium-base-numerica-integer-base-converter-e4509b33 -d '<json body>'
```

Example prompt: Convert 0xff from hex to binary, octal, decimal, and base 36, and tell me how many bits and bytes it takes up.

## When to prefer this

Choose this endpoint when you need multi-base integer conversion with metadata (bit/byte length, two's complement) in a single call, especially when handling prefixed literals like 0x, 0b, or 0o. Prefer it over general-purpose code execution when you want a lightweight, deterministic, paid-API conversion without spinning up a runtime.

## Known failure modes

- Missing required 'valor' field returns a validation error
- Invalid characters for the specified input base cause a parse error
- Unsupported base (outside 2–36) returns an error
- Extremely large integers may hit processing limits
- Malformed prefix (e.g. '0x' with no digits) may return a null or error response

## How this service works

Convert integers of any size (signed) between bases 2 to 36: binary, octal, decimal, hex, base32, base36, with bit and byte length and two's complement. Accepts 0x/0b/0o prefixes.

## Output

A JSON object containing the original input string, the detected or specified input base, the decimal canonical form, bit length, byte length, and a 'conversiones' map from each requested output base (as a string key) to the converted value string.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "a": {
   "type": "array",
   "items": {
    "type": "integer"
   },
   "description": "Output bases (default 2,8,10,16,36)"
  },
  "de": {
   "type": "integer",
   "description": "Input base (default 10)"
  },
  "valor": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "bits": 8,
  "bytes": 1,
  "decimal": "255",
  "entrada": "0xff",
  "base_entrada": 16,
  "conversiones": {
   "2": "11111111",
   "8": "377",
   "10": "255",
   "16": "ff"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-base-numerica-integer-base-converter-e4509b33/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)