interscript/api

Interscript API software — the GraphQL transliteration API as deployable software for Cloudflare Workers (or any Workers-compatible runtime).

This repository is the software only. Deployment configurations (routes, domains, secrets, CI) live in separate deployment repositories — interscript's own is interscript/api.interscript.org. Any organization can deploy this package privately on their own domain.

What it serves

Field-for-field identical to the long-running Ruby API:

field	behavior
info	version JSON
systemCodes	all 287 transliteration systems
transliterate(systemCode!, input!)	transliterate (1MB input cap)
detect(input!, output!)	ranked [{mapName, distance}]

Error strings match byte-for-byte (Couldn't locate <code>).

Architecture

• Engine: the native async interpreter from interscript-ts — no regex compilation.
• Maps: the full corpus (287 systems + 4 dependency libraries, compiled to schema-versioned JSON IR from interscript-maps) is a deploy-time asset, not part of this npm package. Deployment repos fetch a pinned map artifact from interscript/maps, verify it, and expose it through the Workers Assets binding. Immutable per release, edge-cached, zero runtime third-party fetches.
• Server: Hono + GraphQL Yoga.

Deploy your own

npm install @interscript/api-worker
# Then fetch/extract a pinned interscript/maps JSON-IR artifact into ./maps.
# Do not copy maps from this npm package; the package is code-only.

Minimal wrangler.jsonc:

{
  "name": "my-interscript-api",
  "main": "src/index.ts",
  "compatibility_date": "2026-08-01",
  "assets": {
    "directory": "./maps",
    "binding": "ASSETS",
  },
  "routes": [{ "pattern": "api.example.org/*" }],
}

with src/index.ts re-exporting the package, then wrangler deploy. See the deployment repo for a complete, working example.

Development

npm install
npm run build          # tsc
npm test               # vitest
npm run typecheck
npm run lint

Regenerating the map corpus (requires interscript-ruby + interscript-maps):

ruby scripts/build-maps.rb /path/to/interscript-ruby /path/to/maps ./maps

For production deploys, prefer a pinned release artifact from interscript/maps over local regeneration; verify the artifact checksum before wrangler deploy.

Parity

test/fixtures/parity.json holds queries recorded from the production Ruby API; CI replays them against this implementation. Zero-diff is the release gate.

REST v1 (OpenAPI)

REST endpoints serve alongside GraphQL (which remains at POST /graphql):

• GET /openapi.json — the OpenAPI 3.1 document
• GET /v1/info — version + capability summary
• GET /v1/maps / GET /v1/maps/{code} — bundled transliteration systems
• POST /v1/transliterate — {system, input} → {output}
• POST /v1/detect — {input, output} → ranked systems
• GET /v1/models / GET /v1/models/{id} — the neural model index (IMF v1, generated from interscript-ml's models.yaml via npm run gen:models)
• POST /v1/infer — {model, input} → {output}; proxies to the inference service configured with ML_ENDPOINT + ML_TOKEN env vars (Interscript runs src/api/inference.py on Modal: the same parity-verified ONNX decode that gates every release)