lingua · services.dev

lingua sells translation. Three of its Services are AI alone, and one adds a sworn translator's signature. It proves the default: no person, no account, a paid job on localhost from the first command. The Start, Service and Money tabs all run it.

The files

Each file below, from four lines to seven, with what check read back from it: its price, who delivers it, its steps, and what it leaves you.

`services/translation.ts`

services/translation.ts · 4 lines

import { Service } from 'services.dev'

export default Service({
  name: 'Translation',
  input: { document: 'file', to: 'language: a BCP 47 tag, such as fr-CA' },
  output: { document: 'file' },
  price: 49,
})

price: $49 per job
within: 48 hours
who: AI delivers every job.
margin: at least $39.20 a job (80%) · a job that stops costs you at most $9.80
apps: customer portal · owner console

no human lineAI delivers every job.

`services/store-listing.ts`

services/store-listing.ts · 5 lines

import { Service } from 'services.dev'

export default Service({
  name: 'Store Listing',
  description: 'Your app store listing, written for each language you sell in.',
  input: { app: 'text: what the app does, such as a budgeting app for couples', languages: 'language[]: such as fr, de, ja', tone: ['plain', 'playful'] },
  output: { listing: 'file' },
  price: 29,
})

price: $29 per job
within: 48 hours
who: AI delivers every job.
margin: at least $23.20 a job (80%) · a job that stops costs you at most $5.80
apps: customer portal · owner console

no human lineAI delivers every job.

`services/translated-summary.ts`

services/translated-summary.ts · 6 lines

import { Service } from 'services.dev'
import translation from './translation.ts'

export default Service({
  name: 'Translated Summary',
  description: 'A long document, translated, with a one-page summary on top.',
  input: { document: 'file', to: 'language: such as fr-CA' },
  output: { document: 'file', summary: 'file' },
  deliver: { translate: translation, summarize: 'ai' },
  price: 79,
})

price: $79 per job
within: 48 hours
who: AI delivers every job.
margin: at least $53.40 a job (68%) with your Translation · a job that stops costs you at most $25.60
apps: customer portal · owner console

no human lineAI delivers every job.

`services/certified-translation.ts`

services/certified-translation.ts · 7 lines

import { Service } from 'services.dev'
import translation from './translation.ts'

export default Service({
  name: 'Certified Translation',
  description: 'A translated document with its certificate.',
  input: { document: 'file', to: 'language: such as fr', country: 'jurisdiction: such as FR' },
  output: { document: 'file', certificate: 'file' },
  deliver: { translate: translation, certify: 'ai' },
  human: { sign: 'sworn-translator', in: 'country', before: 'certify' },
  price: { usd: 189, payout: 60, within: '3d' },
})

price: $189 per job
within: 3 days
who: A sworn translator in the job's country signs before the certify step.
margin: at least $81.40 a job (43%) with your Translation · a job that stops costs you at most $107.60
apps: customer portal · delivery portal · owner console

human: { sign: 'sworn-translator' }A sworn translator in the job's country signs before the certify step.

job_9Kc4 · waiting · on signature · $189.00 heldjob_9Kc4 · delivered · birth-certificate.fr.pdf · certificate.pdf · $189.00 charged

Build it

Your first paid job writes the first file and sells it. Your own Service adds the next. Grow takes Translation from four lines to a filing: a review, an ask, a signer and a submit step.

One job, every side

The same order on four surfaces, the same job and the same body on each:

API

curl -X POST http://localhost:8787/jobs -H 'content-type: application/json' -d '{"service":"translation","document":{"url":"https://example.com/lease.pdf","name":"lease.pdf"},"to":"fr-CA","key":"lease-fr-CA"}'

402 · magic values: none

{
  "type": "OFFER",
  "object": "offer",
  "service": "translation",
  "title": "Translation",
  "price": {
    "usd": 49,
    "sentence": "$49 per job, within 48 hours, charged on delivery."
  },
  "eta": "48h",
  "terms": "Charged on delivery. Cancel at $0 until it ships. Send it back with a note and the AI redoes it, or you pay $0. Final 7 days after delivery.",
  "next": {
    "do": "order",
    "service": "translation",
    "arguments": {
      "document": {
        "url": "https://example.com/lease.pdf",
        "name": "lease.pdf"
      },
      "to": "fr-CA",

Every branch

lingua's own suite runs every branch its files write, each by the magic value that produces it, over HTTP and MCP:

Run

npx services.dev verify

magic values: metadata.sandbox.outside = { reject: [missing_certificate] }, metadata.sandbox.outside = { reject: [a_code_no_route_names] }, metadata.sandbox.review = pass, metadata.sandbox.review = flag_once, metadata.sandbox.outside = ack, metadata.sandbox.outside = reject_once, metadata.sandbox.outside = never, metadata.sandbox.outside = alerts, metadata.sandbox.talk = open, watch.url = https://fails-once.example.test/suite, watch.url = https://down.example.test/suite, watch.url = https://hooks.example.test/suite

lingua · 121 HTTP cases and 23 MCP cases from 42 rows: each row by its live credentials and magic values, with its auth, audience, replay and next cases · http://localhost:8787/verify/suite.json
121 passed · 0 failed · 54 skipped

The money

Every ledger line is in the check above: what a job charges, what the AI costs, what a person earns, and what you keep. Money explains each.

On site: interpreting

lingua also sells interpreting on site, from a Pool in the work register. The teaser names the window and the distance, never the address:

captured/pool-register.txt · 200 · tsk_7Hq2 · open · magic values: client.email = signs@example.test, member = mbr_eligible

→ GET /tasks/tsk_7Hq2   # as mbr_eligible: the teaser
{
  "id": "tsk_7Hq2",
  "object": "task",
  "livemode": false,
  "pool": "interpreters",
  "role": "interpreter",
  "register": "work",
  "status": "open",
  "fields": {
    "act": "attend",

Call

→ POST /tasks/tsk_7Hq2/claim   # as mbr_eligible

200 · tsk_7Hq2 · claimed · 3 Nov 14:00 to 15:00 is yours · reminders 24h and 1h before · the address opens on the packet · magic values: client.email = signs@example.test, member = mbr_eligible

← 200 · tsk_7Hq2 · claimed · 3 Nov 14:00 to 15:00 is yours · reminders 24h and 1h before · the address opens on the packet

A check-in 2.9 km away is refused, and one from the door counts:

captured/pool-register.txt · magic values: client.email = signs@example.test, member = mbr_eligible

→ POST /tasks/tsk_7Hq2/arrive {"fix":{"lat":48.8791,"lng":2.3554,"accuracy_m":15}}   # as mbr_eligible, 3 Nov 13:48
← 403 not_on_site: The check-in is 2.9 km from the site, and a check-in counts within 250 m. Check in from the site.

Call

→ POST /tasks/tsk_7Hq2/arrive {"fix":{"lat":48.8556,"lng":2.3605,"accuracy_m":12}}   # as mbr_eligible, 3 Nov 13:56

200 · tsk_7Hq2 · on_site · 38 m from the site · 4 min before the window · magic values: client.email = signs@example.test, member = mbr_eligible

← 200 · tsk_7Hq2 · on_site · 38 m from the site · 4 min before the window

Call

→ POST /tasks/tsk_7Hq2/complete {"check_out":{"fix":{"lat":48.8557,"lng":2.3604,"accuracy_m":10}},"sign_off":"ask_7Hq4"}   # as mbr_eligible, 3 Nov 15:04

200 · tsk_7Hq2 · done · completed · sha256:5be1c0a7d29e · magic values: client.email = signs@example.test, member = mbr_eligible

  15:04 · step.committed · attend · person · certified interpreter · FR · mbr_eligible
  15:04 · pay.accrued · mbr_eligible · complete · $90.00
  15:04 · job.charged · job_7Hq2 · $140.00 · released on the client's sign-off

captured/pool-register.txt · 200 · completed · magic values: client.email = signs@example.test, member = mbr_eligible

→ GET /owner/jobs/job_7Hq2   # the owner: record[9].completed, the artifact the gate froze
{
  "member": "mbr_eligible",
  "credential": "certified interpreter",
  "region": "FR",
  "rules": "2026-10",
  "site": { "address": "14 Rue de Rivoli, 75004 Paris", "within_m": 250 },
  "window": { "from": "2026-11-03T14:00:00+01:00", "to": "2026-11-03T15:00:00+01:00" },
  "evidence": [

A client who never came still pays, and the interpreter is paid in full. A no-show reopens the Task:

captured/pool-register.txt · 200 · tsk_7Hr6 · done · party_absent · sha256:91c4e2d07b3a · magic values: client.email = signs@example.test, member = mbr_eligible

→ POST /tasks/tsk_7Hr6/complete {"party_absent":true,"check_out":{"fix":{"lat":48.8662,"lng":2.3411,"accuracy_m":11}}}   # as mbr_eligible, 4 Nov 10:16: on site since 09:58, and no one came to the door
  10:16 · step.committed · attend · person · certified interpreter · FR · mbr_eligible · party_absent after site.grace 15min
  10:16 · pay.accrued · mbr_eligible · complete · party_absent · $90.00
  10:16 · job.charged · job_7Hr6 · $140.00 · released on party_absent

Call

→ GET /tasks/tsk_7Hr5   # a visit nobody checked in to, 10 minutes after its window opened

200 · tsk_7Hr5 · open · no-show by mbr_7Hq4 · offered again to members who can reach the site by 14:40 · the client is asked whether to wait or move the window · magic values: client.email = signs@example.test, member = mbr_eligible

← 200 · tsk_7Hr5 · open · no-show by mbr_7Hq4 · offered again to members who can reach the site by 14:40 · the client is asked whether to wait or move the window

The apps

The sworn translator's delivery portal, and the owner console, from one run:

Run

open http://localhost:8787/sworn-translators

magic values: member = mbr_eligible

Certified Translation · you earn $60.00 of each $189 job

Run

open http://localhost:8787/console

magic values: member = mbr_eligible

lingua · 5 jobs · +$297.00 · AI $4.20 · people $60.00 · you $232.80
Certified Translation: a sworn translator signed 1 of 1 job unchanged, at $60.00 in payouts.