---
title: "Slug generator: Unicode-aware URL slug with transliteration"
method: GET
path: "/v1/text/slug"
tags: ["deterministic", "no-api-key", "text", "unicode", "slug"]
---

# Slug generator: Unicode-aware URL slug with transliteration

`GET /v1/text/slug`

## Request

- Base URL: `https://api.duoleads.com`
- URL: `https://api.duoleads.com/v1/text/slug`
- Auth: none declared

Slug generator: turn arbitrary text into a URL-safe slug. Decomposes accents, transliterates German umlauts, Scandinavian and Turkish letters, the ligatures that lose meaning under plain NFD, and Cyrillic (Russian, Ukrainian, Belarusian, Bulgarian, Serbian, Macedonian; language from lang or inferred from the letters). Lowercases, collapses separators, truncates on a word boundary. Returns the slug plus what was removed.

**Output (`data`):** slug, length, truncated, source_length, transliterated [{from, to}] for every mapped character, removed (characters dropped entirely, deduplicated; includes the Cyrillic soft and hard signs and the Ukrainian apostrophe). Cyrillic: Ukrainian follows the 2010 national system (Київ Україна -> kyiv-ukraina); Belarusian, Bulgarian, Serbian and Macedonian use ASCII slug tables; Russian letters use BGN/PCGN (Привет -> privet); other Cyrillic letters use ISO 9:1995 without diacritics.

Deterministic: identical input returns identical output, so the response is served with `Cache-Control: private, max-age=31536000, immutable` (the paying client may cache it indefinitely; shared caches must not, because the response is paid).

Price: $0.05 USDC per call (x402, Base). Route contract version 1.0.0. Docs: https://api.duoleads.com/docs#text-slug

## Query parameters

- `text` string, required
- `separator` '-' | '_' | '.' | ''
- `max` integer
- `case` 'lower' | 'preserve' | 'upper'
- `lang` string

## Response `200`

Paid and settled. `data` is route-specific; a route that judges its input returns 200 with `data.valid: false` for a bad value.

- object
  - `ok` unknown, required
  - `route` '/v1/text/slug', required
  - `version` '1.0.0', required
  - `data` object, required: slug, length, truncated, source_length, transliterated [{from, to}] for every mapped character, removed (characters dropped entirely, deduplicated; includes the Cyrillic soft and hard signs and the Ukrainian apostrophe). Cyrillic: Ukrainian follows the 2010 national system (Київ Україна -> kyiv-ukraina); Belarusian, Bulgarian, Serbian and Macedonian use ASCII slug tables; Russian letters use BGN/PCGN (Привет -> privet); other Cyrillic letters use ISO 9:1995 without diacritics.
    - `slug` string, required
    - `length` integer, required
    - `truncated` boolean, required
    - `source_length` integer, required
    - `transliterated` object[], required
      - `from` string, required
      - `to` string, required
    - `removed` string, required
  - `meta` Meta, required
    - `disclaimer` string, required: Legal short disclaimer, identical on every response.
    - `request_id` string, required: ULID.
    - `computed_at` string, date-time, required: RFC 3339 UTC with milliseconds.
    - `price_usd` string, required: Decimal string, "0.05".
    - `deterministic` boolean, required
    - `sources` object[]: Present only on routes that read a vendored dataset: the exact edition that answered.
      - `id` string, required
      - `version` string, required
      - `published` string, required
      - `attribution` string
      - `licence` string

## Other responses

- `400`: MISSING_PARAM, INVALID_PARAM or UNSUPPORTED_VALUE. Not charged: validation runs before the paywall.
- `402`: Payment required. No valid PAYMENT-SIGNATURE was supplied: read the base64 PAYMENT-REQUIRED header (or this body) for the price ($0.05 = 50000 atomic USDC on eip155:8453), sign an EIP-3009 authorization and retry. Also returned when settlement is declined (PAYMENT_FAILED). Nothing is charged on a 402.
- `404`: NOT_FOUND: unknown path. Not charged.
- `405`: METHOD_NOT_ALLOWED: only GET and HEAD are served. Not charged.
- `413`: INPUT_TOO_LARGE: a parameter exceeded its documented maximum length. Not charged.
- `500`: INTERNAL: a server bug. Not charged.

---

[API](https://skmtc.dev/duoleads/apis/duo-data-utilities-iban-isin-vat-tax-id-barcode-timezone-geo.md) · [All operations](https://skmtc.dev/duoleads/apis/duo-data-utilities-iban-isin-vat-tax-id-barcode-timezone-geo/llms.txt) · [OpenAPI document](https://skmtc.dev/duoleads/apis/duo-data-utilities-iban-isin-vat-tax-id-barcode-timezone-geo/revisions/18790d59615e?raw)