# Dev Reference Unicode Character Lookup

> Dev Reference Unicode Character Lookup is a paid API for AI agents from dev-reference.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).

Looks up a Unicode code point and returns its name, block, category, plane, UTF-8/UTF-16/UTF-32 bytes, and HTML/JS/CSS escape sequences.

## Facts

- Endpoint: GET https://dev-reference.x402tookit.com/unicode-char?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dev-reference-unicode-character-lookup-d4c91c58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_665SvAKTEjmGwsIpAyykm

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 dev-reference-unicode-character-lookup-d4c91c58
```

Example prompt: What's the official Unicode name, general category, UTF-8 bytes, and HTML escape for the character U+1F600?

## When to prefer this

Use this endpoint when you need authoritative, comprehensive Unicode metadata for a single code point — especially when you need encoding formats across multiple representations (UTF-8, UTF-16, HTML, JS, CSS) in one call. Prefer it over generic Unicode tables or character databases when an agent needs structured, machine-readable output with validity checking and escape sequences for web/code contexts.

## Known failure modes

- Invalid or unrecognized code point format returns a non-valid verdict with reasons
- Code points outside the Unicode range may return nulls for most fields
- Surrogate code points flagged as non-scalar values
- Private-use or unassigned characters may have null name fields
- Malformed query parameter (missing cp) returns an error

## How this service works

Unicode character lookup by code point or character: name, block, category, UTF-8/UTF-16 bytes and HTML/JS/CSS escapes.

## Output

Returns a structured object with the character's official Unicode name, code point, block, plane and plane name, general category code and full name, UTF-8/UTF-16/UTF-32 byte representations, UTF-16 unit count, HTML hex and decimal escapes, JavaScript escape (including surrogate pair for supplementary characters), CSS escape, URL-encoded form, Unicode version, scalar value and noncharacter flags, a validity verdict with reasons, data source and coverage notes, and a human-readable summary.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "cp"
     ],
     "properties": {
      "cp": {
       "type": "string",
       "description": "U+1F600, 0x1F600, a decimal number like 128512, or the character itself"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "name": {
       "type": [
        "null",
        "string"
       ]
      },
      "utf8": {
       "type": [
        "null",
        "string"
       ]
      },
      "block": {
       "type": [
        "null",
        "string"
       ]
      },
      "plane": {
       "type": [
        "null",
        "number"
       ]
      },
      "utf16": {
       "type": [
        "null",
        "string"
       ]
      },
      "utf32": {
       "type": [
        "null",
        "string"
       ]
      },
      "valid": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "decimal": {
       "type": [
        "null",
        "number"
       ]
      },
      "htmlHex": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "character": {
       "type": [
        "null",
        "string"
       ]
      },
      "codePoint": {
       "type": [
        "null",
        "string"
       ]
      },
      "cssEscape": {
       "type": [
        "null",
        "string"
       ]
      },
      "planeName": {
    
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dev-reference-unicode-character-lookup-d4c91c58/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dev-reference.x402tookit.com](https://www.zero.xyz/host/dev-reference.x402tookit.com/llms.txt)