Developers

The Andalu partner API

Every Andalu offer with its all-in buyer price, your tracked link and the rules a buyer can buy it under. Version 2.0.0. Prices include every fee, and stock has two states, never a count.

Get your keys Try it in Swagger UI

Quickstart

Five commands, copy and paste. They run against the sandbox with your test key.

1. Put your test key in a variable
Create an andalu_test_ key in your partner hub. It is shown once.
```
export ANDALU_KEY="andalu_test_your_key_here"
```
2. Read the vocabulary and your limits
Every platform, region, currency and profile code, plus your key's limits.
```
curl -s -H "X-Api-Key: $ANDALU_KEY" "https://andalu.com/api/partner/v2/meta"
```
3. List offers
The first page of every offer, all-in prices in EUR. Add currency=USD or kind=esim to narrow it.
```
curl -s -H "X-Api-Key: $ANDALU_KEY" "https://andalu.com/api/partner/v2/offers?limit=5"
```

4. Page with the cursor

Pass meta.nextCursor back as after until hasNextPage is false.

curl -s -H "X-Api-Key: $ANDALU_KEY" "https://andalu.com/api/partner/v2/offers?limit=500&after=<meta.nextCursor>"

5. Sync only what changed
Send the time of your last sync. G2A's own parameter name, so an existing sync job can keep it.
```
curl -s -H "X-Api-Key: $ANDALU_KEY" "https://andalu.com/api/partner/v2/offers?updatedAtFrom=2026-10-02T06:00:00Z"
```

The whole API as a file: openapi.json, openapi.yaml and a Postman collection.

Keys and sandbox

Send your key as X-Api-Key, or as Authorization: Bearer with the same key. Keys come from your partner hub and are shown once.

andalu_test_...: A test key. Real offers and prices, with sandbox: true in every answer and an Andalu-Sandbox header. Nothing a sandbox click or order does is paid.
andalu_live_...: A live key. It answers not_open until the program opens, then works the same as a test key, for real.
Scopes: offers (offers and meta), stats (your numbers) and feed (the snapshot, for approved comparison sites).
IP allowlist: Optional, per key, set in your hub. A call from any other address answers ip_not_allowed.
Rotation: Two live keys can be active at once: roll out the new one, then revoke the old one.

Endpoints

Base URL: https://andalu.com/api/partner/v2

GET /offers

List offers

Every offer matching the filters, paged. A full sync pages in the default order (listed); a change sync sends updatedAtFrom with the time of your last sync. Costs one request of your quota. Needs a key with the offers scope.

page (query): 1-based page number. Do not send with after.
limit (query): Offers per page, at most 500.
after (query): The nextCursor of the previous page. Stable when offers are added. Do not send with page.
kind (query): Only game keys, or only eSIM plans.
platform (query): A platform code from GET /meta (case-insensitive).
region (query): A region code from GET /meta, or an eSIM destination or country code (case-insensitive).
currency (query): The currency every price is stated in.
inStock (query): Only offers that can be bought now (true) or that cannot (false).
updatedAtFrom (query): Only offers changed at or after this time (ISO 8601). Use it to sync changes.
sort (query): listed: first listed first, then sku (the stable order for full syncs). updatedAt_desc: most recently changed first.
profile (query): Shape each offer for an importer you already run: allkeyshop, kinguin or g2a. Omit for the full v2 offer.

Answers: 200 A page of offers. With profile, each offer is in that profile's shape. 400 A query parameter is not valid. 401 No valid key. 403 The key is valid but may not do this. 429 Over a rate limit or the daily quota. Wait for Retry-After. 503 Briefly unavailable. Retry with backoff.

{
  "data": [
    {
      "sku": "KSV-MWDDYETFMD",
      "kind": "game",
      "name": "Real Heroes: Firefighter HD (PC) Steam Key GLOBAL",
      "productName": "Real Heroes: Firefighter HD",
      "slug": "real-heroes-firefighter-hd-steam-global",
      "platform": "STEAM",
      "region": "GLOBAL",
      "edition": "Standard",
      "isAddOn": false,
      "image": "https://andalu.com/img/cover/real-heroes-firefighter-hd.jpg",
      "url": "https://andalu.com/go/MAYA10/KSV-MWDDYETFMD",
      "currency": "EUR",
      "price": 4.49,
      "priceMinor": 449,
      "priceStatus": "available",
      "feesIncluded": true,
      "prices": {
        "card": {
          "currency": "EUR",
          "price": 4.49,
          "priceMinor": 449
        },
        "ideal": {
          "currency": "EUR",
          "price": 4.12,
          "priceMinor": 412
        }
      },
      "rails": [
        {
          "id": "card",
          "name": "Credit / Debit Card",
          "currency": "EUR",
          "price": 4.49,
          "priceMinor": 449
        },
        {
          "id": "ideal",
          "name": "iDEAL",
          "currency": "EUR",
          "price": 4.12,
          "priceMinor": 412
        }
      ],
      "voucher": null,
      "stock": "in_stock",
      "inStock": true,
      "updatedAt": "2026-10-02T07:00:00.000Z",
      "priceValidUntil": "2026-10-03",
      "purchaseRules": {
        "maxPerOrder": 10,
        "minOrderEur": 2,
        "activationRegions": null,
        "platform": "STEAM",
        "deviceRequirement": null,
        "deliveryMethod": "email",
        "returnable": false
      }
    },
    {
      "sku": "esim-JP_3_30",
      "kind": "esim",
      "name": "Japan eSIM 3 GB 30 Days - Prepaid Travel Data",
      "productName": "Japan eSIM",
      "slug": "japan",
      "platform": "ESIM",
      "region": "JP",
      "edition": null,
      "isAddOn": false,
      "image": "https://andalu.com/esim/japan/opengraph-image",
      "url": "https://andalu.com/go/MAYA10/esim-JP_3_30",
      "currency": "EUR",
      "price": 6.9,
      "priceMinor": 690,
      "priceStatus": "available",
      "feesIncluded": true,
      "prices": {
        "card": {
          "currency": "EUR",
          "price": 6.9,
          "priceMinor": 690
        }
      },
      "rails": [
        {
          "id": "card",
          "name": "Credit / Debit Card",
          "currency": "EUR",
          "price": 6.9,
          "priceMinor": 690
        }
      ],
      "voucher": null,
      "stock": "in_stock",
      "inStock": true,
      "updatedAt": "2026-10-02T07:00:00.000Z",
      "priceValidUntil": "2026-10-03",
      "purchaseRules": {
        "maxPerOrder": 10,
        "minOrderEur": null,
        "activationRegions": null,
        "platform": null,
        "deviceRequirement": "esim_unlocked_phone",
        "deliveryMethod": "email",
        "returnable": false
      },
      "destination": "Japan",
      "country": "JP",
      "regionCodes": [
        "JP"
      ],
      "dataGb": 3,
      "dataType": "total",
      "days": 30
    }
  ],
  "meta": {
    "totalResults": 2,
    "page": 1,
    "limit": 100,
    "nextCursor": null,
    "hasNextPage": false
  },
  "sandbox": true
}

GET /offers/{sku}

Get one offer

One offer by sku. Costs one request of your quota. Needs a key with the offers scope.

sku (path): The offer sku.
currency (query): The currency every price is stated in.
profile (query): Shape each offer for an importer you already run: allkeyshop, kinguin or g2a. Omit for the full v2 offer.

Answers: 200 The offer. 400 A query parameter is not valid. 401 No valid key. 403 The key is valid but may not do this. 404 Not found. 429 Over a rate limit or the daily quota. Wait for Retry-After. 503 Briefly unavailable. Retry with backoff.

{
  "data": {
    "sku": "KSV-MWDDYETFMD",
    "kind": "game",
    "name": "Real Heroes: Firefighter HD (PC) Steam Key GLOBAL",
    "productName": "Real Heroes: Firefighter HD",
    "slug": "real-heroes-firefighter-hd-steam-global",
    "platform": "STEAM",
    "region": "GLOBAL",
    "edition": "Standard",
    "isAddOn": false,
    "image": "https://andalu.com/img/cover/real-heroes-firefighter-hd.jpg",
    "url": "https://andalu.com/go/MAYA10/KSV-MWDDYETFMD",
    "currency": "EUR",
    "price": 4.49,
    "priceMinor": 449,
    "priceStatus": "available",
    "feesIncluded": true,
    "prices": {
      "card": {
        "currency": "EUR",
        "price": 4.49,
        "priceMinor": 449
      },
      "ideal": {
        "currency": "EUR",
        "price": 4.12,
        "priceMinor": 412
      }
    },
    "rails": [
      {
        "id": "card",
        "name": "Credit / Debit Card",
        "currency": "EUR",
        "price": 4.49,
        "priceMinor": 449
      },
      {
        "id": "ideal",
        "name": "iDEAL",
        "currency": "EUR",
        "price": 4.12,
        "priceMinor": 412
      }
    ],
    "voucher": null,
    "stock": "in_stock",
    "inStock": true,
    "updatedAt": "2026-10-02T07:00:00.000Z",
    "priceValidUntil": "2026-10-03",
    "purchaseRules": {
      "maxPerOrder": 10,
      "minOrderEur": 2,
      "activationRegions": null,
      "platform": "STEAM",
      "deviceRequirement": null,
      "deliveryMethod": "email",
      "returnable": false
    }
  },
  "sandbox": true
}

GET /feed.json

The snapshot as JSON

Every offer in one JSON document, rebuilt hourly, EUR, with your tracked links. Needs the feed scope (approved comparison sites). Send If-None-Match with the last ETag: an unchanged snapshot answers 304 and costs nothing. A full download counts against your quota and the 12 an hour snapshot allowance. Served gzip when you send Accept-Encoding: gzip. Needs a key with the feed scope.

If-None-Match (header): The ETag of the snapshot you hold. If it is still current the answer is 304 with no body, and costs no quota.

Answers: 200 The snapshot. 304 Your snapshot is current. No body, no quota. 401 No valid key. 403 The key is valid but may not do this. 429 Over a rate limit or the daily quota. Wait for Retry-After. 503 The snapshot is not built yet, or a dependency is briefly down.

{
  "version": "2.0.0",
  "currency": "EUR",
  "data": [
    {
      "sku": "KSV-MWDDYETFMD",
      "kind": "game",
      "name": "Real Heroes: Firefighter HD (PC) Steam Key GLOBAL",
      "productName": "Real Heroes: Firefighter HD",
      "slug": "real-heroes-firefighter-hd-steam-global",
      "platform": "STEAM",
      "region": "GLOBAL",
      "edition": "Standard",
      "isAddOn": false,
      "image": "https://andalu.com/img/cover/real-heroes-firefighter-hd.jpg",
      "url": "https://andalu.com/go/MAYA10/KSV-MWDDYETFMD",
      "currency": "EUR",
      "price": 4.49,
      "priceMinor": 449,
      "priceStatus": "available",
      "feesIncluded": true,
      "prices": {
        "card": {
          "currency": "EUR",
          "price": 4.49,
          "priceMinor": 449
        },
        "ideal": {
          "currency": "EUR",
          "price": 4.12,
          "priceMinor": 412
        }
      },
      "rails": [
        {
          "id": "card",
          "name": "Credit / Debit Card",
          "currency": "EUR",
          "price": 4.49,
          "priceMinor": 449
        },
        {
          "id": "ideal",
          "name": "iDEAL",
          "currency": "EUR",
          "price": 4.12,
          "priceMinor": 412
        }
      ],
      "voucher": null,
      "stock": "in_stock",
      "inStock": true,
      "updatedAt": "2026-10-02T07:00:00.000Z",
      "priceValidUntil": "2026-10-03",
      "purchaseRules": {
        "maxPerOrder": 10,
        "minOrderEur": 2,
        "activationRegions": null,
        "platform": "STEAM",
        "deviceRequirement": null,
        "deliveryMethod": "email",
        "returnable": false
      }
    }
  ],
  "meta": {
    "totalResults": 1,
    "page": null,
    "limit": 1,
    "nextCursor": null,
    "hasNextPage": false
  },
  "updatedAt": "2026-10-02T07:00:00.000Z"
}

GET /feed.xml

The snapshot as XML

Every offer in one XML document, rebuilt hourly, EUR, with your tracked links. Needs the feed scope (approved comparison sites). Send If-None-Match with the last ETag: an unchanged snapshot answers 304 and costs nothing. A full download counts against your quota and the 12 an hour snapshot allowance. Served gzip when you send Accept-Encoding: gzip. Needs a key with the feed scope.

If-None-Match (header): The ETag of the snapshot you hold. If it is still current the answer is 304 with no body, and costs no quota.

<?xml version="1.0" encoding="UTF-8"?>
<offers version="2.0.0" currency="EUR">
<offer><sku>KSV-MWDDYETFMD</sku><kind>game</kind><name>Real Heroes: Firefighter HD (PC) Steam Key GLOBAL</name><price>4.49</price><priceMinor>449</priceMinor><inStock>true</inStock><url>https://andalu.com/go/MAYA10/KSV-MWDDYETFMD</url></offer>
<meta><totalResults>1</totalResults><updatedAt>2026-10-02T07:00:00.000Z</updatedAt></meta>
</offers>

GET /meta

The vocabulary and your limits

Every code a filter takes (platforms, regions, eSIM destinations, currencies), the sorts and profiles, and your key's limits and scopes. Costs one request of your quota. Needs a key with the offers scope.

Answers: 200 The vocabulary. 401 No valid key. 403 The key is valid but may not do this. 429 Over a rate limit or the daily quota. Wait for Retry-After. 503 Briefly unavailable. Retry with backoff.

{
  "data": {
    "version": "2.0.0",
    "kinds": [
      "game",
      "esim"
    ],
    "platforms": [
      {
        "code": "STEAM",
        "name": "Steam",
        "kind": "game"
      },
      {
        "code": "ESIM",
        "name": "eSIM",
        "kind": "esim"
      }
    ],
    "regions": [
      {
        "code": "GLOBAL",
        "name": "Global"
      }
    ],
    "esimDestinations": [
      {
        "code": "JP",
        "name": "Japan"
      }
    ],
    "currencies": [
      {
        "code": "EUR",
        "minorUnit": 2
      }
    ],
    "stockStates": [
      "in_stock",
      "out_of_stock"
    ],
    "sorts": [
      "listed",
      "updatedAt_desc"
    ],
    "profiles": [
      "allkeyshop",
      "kinguin",
      "g2a"
    ],
    "pageLimitMax": 500,
    "offerCount": 2,
    "limits": {
      "tier": "marketer",
      "perMinute": 30,
      "perDay": 5000,
      "snapshotsPerHour": 0
    },
    "scopes": [
      "offers"
    ]
  },
  "sandbox": true
}

GET /stats

Your clicks, earnings and API use

Your daily clicks (all, and valid ones), your earnings by state, and your API requests per day. Needs the stats scope. Costs one request of your quota. Needs a key with the stats scope.

from (query): First UTC day, YYYY-MM-DD. Default: 29 days before to.
to (query): Last UTC day, YYYY-MM-DD. Default: today. At most 400 days from from.

Answers: 200 Your numbers. 400 A query parameter is not valid. 401 No valid key. 403 The key is valid but may not do this. 429 Over a rate limit or the daily quota. Wait for Retry-After. 503 Briefly unavailable. Retry with backoff.

{
  "data": {
    "period": {
      "from": "2026-09-03",
      "to": "2026-10-02"
    },
    "clicks": [
      {
        "day": "2026-10-01",
        "clicks": 120,
        "validClicks": 97
      }
    ],
    "totals": {
      "clicks": 120,
      "validClicks": 97
    },
    "earnings": [
      {
        "state": "pending",
        "count": 3,
        "currency": "EUR",
        "amount": 1.24,
        "amountMinor": 124
      }
    ],
    "apiRequests": [
      {
        "day": "2026-10-01",
        "requests": 412
      }
    ]
  },
  "sandbox": false
}

GET /openapi.json

openapi.json

This document, as JSON. Public: no key needed.

Answers: 200 This document, as JSON.

{
  "info": {
    "title": "Andalu Partner Offer API"
  }
}

GET /openapi.yaml

openapi.yaml

This document, as YAML. Public: no key needed.

Answers: 200 This document, as YAML.

openapi: 3.1.0

GET /postman.json

postman.json

A Postman collection generated from this document. Set the apiKey variable to your test key. Public: no key needed.

Answers: 200 A Postman collection generated from this document. Set the apiKey variable to your test key.

{
  "info": {
    "title": "Andalu Partner Offer API"
  }
}

Offer fields

A game key and an eSIM plan share these fields. Every money value has price, priceMinor and currency.

sku: Our id for the offer. It never changes, whoever supplies the product. Games: the storefront variant id. eSIM plans: esim-<plan code>.
kind: What it is.
name: The full listing title: what it is, on what, for where.
productName: The product's own name.
slug: The product page slug (games) or destination slug (eSIM).
platform: Upper-case platform code, for example STEAM, XBOX, PLAYSTATION; ESIM for an eSIM plan. GET /meta lists them.
region: Upper-case region code a game key activates in (GLOBAL, EUROPE, NORTH-AMERICA); for an eSIM plan, the destination code (JP, EU-42).
edition: The edition (Standard, Deluxe Edition ...), or null for an eSIM plan.
isAddOn: True when the product needs the base game (DLC, a soundtrack).
image: The product image, served from andalu.com.
url: Your own tracked link to the product page. Send buyers here: it credits the sale to you.
currency: ISO 4217 code of every price in this offer (the currency you asked for, EUR by default).
price: The all-in buyer price, decimal. Nothing is added at checkout. Null when priceStatus is unavailable.
priceMinor: The same price in minor units. Null when priceStatus is unavailable.
priceStatus: available, or unavailable when today's exchange rates cannot be read: then every price is null rather than guessed. Try again later.
feesIncluded: Always true: payment fees are already in every price.
prices: The all-in price per payment method. A method can only be cheaper than price, never dearer. A method is absent when it is not offered for this product.
rails: The same per-method prices as a list, with the method's id and name.
voucher: Your code and the price with it, when the program gives code buyers a discount. Null otherwise.
memberPrice: The member price. Present only while Andalu membership is open. Optional.
stock: Two states only. Never a count.
inStock: True when it can be bought now (a pre-order included).
updatedAt: When the offer last changed (price input, stock, words or rules), ISO 8601 UTC.
priceValidUntil: The day the price holds until (the next UTC day), as product pages state it.
purchaseRules: The rules checkout applies, so a click never lands on something that cannot be bought.
steamAppId: The Steam app id, when the catalog records one for this exact product. Absent otherwise. Optional.

eSIM plans also carry

destination: The destination's name.
country: ISO 3166-1 alpha-2 code when the plan covers one country.
regionCodes: Every country the plan covers (ISO 3166-1 alpha-2).
dataGb: Data in GB: the whole allowance (total) or per day (daily).
dataType: total: one allowance for the whole plan. daily: a fresh allowance every day.
days: How many days the plan runs.

purchaseRules

maxPerOrder: Most units of this product in one order.
minOrderEur: The smallest order in EUR for this kind of product, or null.
activationRegions: Upper-case region codes the key activates in; null means anywhere.
platform: Upper-case platform code, or null for an eSIM plan.
deviceRequirement: A device the buyer needs, as a code: esim_unlocked_phone (an eSIM-capable phone not locked to a carrier), or null.
deliveryMethod: Always email: codes and QR codes are sent by email, never shown on a page.
returnable: Always false: a delivered digital code cannot be returned.

Paging and sync

page and limit: page counts from 1; limit is 1 to 500 (100 by default). The default order lists each offer where it was first listed, so a new offer is added at the end and earlier pages never shift.
after: Pass meta.nextCursor as after for the next page. Send page or after, not both.
meta: totalResults, page, limit, nextCursor and hasNextPage, on every list.
updatedAtFrom: Only offers changed at or after a time: price, stock, words or buying rules. Keep the time of your last sync and send it next time.
sort=updatedAt_desc: Most recently changed first.
The snapshot: GET /feed.json or /feed.xml: every offer, rebuilt hourly, EUR. Send If-None-Match with the last ETag; an unchanged snapshot answers 304 and costs nothing.

Limits

Published, and sent on every answer in the IETF RateLimit-Policy and RateLimit headers. A 429 carries Retry-After.

Marketer keys: 30 requests a minute and 5000 a day (UTC). No snapshot.
Feed keys: 60 requests a minute, 20000 a day, and 12 snapshot downloads an hour.
A 304: Costs nothing.
Wrong keys: Too many requests with a wrong key from one address are refused for 10 minutes.
The demo key: The key Swagger UI uses is shared by every reader, so it allows a few calls a minute per reader and reads offers and meta only.

Errors

Every error is an RFC 9457 problem document (application/problem+json). Switch on type or code, never on the text; instance is the request's id, also in the Request-Id header.

401 invalid_key

No key, a malformed key, an unknown key or a revoked one. Send a key from your hub in X-Api-Key, or as Authorization: Bearer.

403 forbidden_scope

The key lacks the scope the endpoint needs (offers, feed or stats). Use a key with that scope. The feed scope is granted to approved comparison sites.

403 ip_not_allowed

The key has an IP allowlist and the caller is not on it. Call from an allowed address, or change the allowlist in your hub.

403 partner_inactive

The partner account is paused, under review or suspended. Check your hub, or write to partners support.

403 not_open

A live key before the program opens. Use your andalu_test_ key until then. Test answers are real data with sandbox: true.

404 not_found

The sku is not in the catalog, or the path does not exist. List skus with GET /offers.

400 invalid_parameter

A query parameter has a value the endpoint does not take. The problem's parameter field names it; detail says what it takes.

429 rate_limited

Over the per-minute limit, the hourly snapshot allowance, or too many bad keys from one address. Wait for Retry-After seconds. Pace with the RateLimit header.

429 quota_exceeded

Over the daily quota (UTC day). Wait until midnight UTC, or sync from the snapshot with If-None-Match.

503 snapshot_not_ready

Your feed snapshot has not been built yet. Try again after Retry-After, or page through GET /offers meanwhile.

503 unavailable

A dependency is briefly unreachable. Retry with backoff.

Links and attribution

Every offer's url is your own tracked link (/go/<you>/<sku>). A buyer who clicks it is credited to you for 30 days, and stays linked to you for 12 months. Send buyers to that url as it is: it lands on the product page with nothing added.

Postbacks

Each time a sale is made or changes state we can send a signed server-to-server postback to your URL, with an Andalu-Signature header (t= and v1=, HMAC-SHA256 with your secret). Set the URL in your hub. How to verify a postback.

Migrating an importer

If you already import from a key marketplace, ask for its profile and map nothing, or map these fields from the full offer.

From AllKeyShop

Ask for profile=allkeyshop and each row arrives in the merchant feed shape, prices all-in with feesCard 0. There is no PayPal method, so there is no pricePaypal.

id: sku
region, edition, activationPlatform: region, edition, platform
originalPrice, price: price (no voucher)
priceCard, feesCard: prices.card.price, always 0
voucher_code, voucher_discount_value: voucher.code, price minus voucher.price
dispo: inStock (1 or 0, never a count)
url: url (your tracked link)

curl -s -H "X-Api-Key: $ANDALU_KEY" "https://andalu.com/api/partner/v2/offers?profile=allkeyshop&limit=100"

From Kinguin

If your importer reads the Kinguin product export, ask for profile=kinguin, or map these fields from the full offer.

kinguinId, productId: sku
name: name
platform: platform
regionalLimitations: region
price: price (all-in, decimal), or priceMinor
the stock count field: inStock (we publish no count)
page, limit, item_count: page, limit, meta.totalResults
updatedAt: updatedAt

curl -s -H "X-Api-Key: $ANDALU_KEY" "https://andalu.com/api/partner/v2/offers?profile=kinguin&limit=100"

From G2A

If your importer reads the G2A product export, ask for profile=g2a, or map these fields from the full offer.

id: sku
name, slug: name, slug
platform, region: platform, region
retail_min_price: price (the all-in buyer price)
minPrice: none: there is one buyer price
thumbnail: image
updated_at, updatedAtFrom: updatedAt, updatedAtFrom
docs, data, meta.totalResults: data, meta.totalResults

curl -s -H "X-Api-Key: $ANDALU_KEY" "https://andalu.com/api/partner/v2/offers?profile=g2a&limit=100"

From Eneba

There is no Eneba profile: its API is a cursor-paged graph. The full offer maps directly.

product.id: sku
first, after, pageInfo.endCursor: limit, after, meta.nextCursor
pageInfo.hasNextPage: meta.hasNextPage
sort UPDATED_AT_DESC: sort=updatedAt_desc
price.amount (cents): priceMinor

Changelog

2.0.0 (2026-10-02)

First release of v2: /offers, /offers/{sku}, /feed.json, /feed.xml, /meta and /stats.
Keys are andalu_live_ and andalu_test_ keys from your partner hub, sent as X-Api-Key or Bearer.
Page with page and limit, or with the after cursor. Sync changes with updatedAtFrom or sort=updatedAt_desc.
Every price has price, priceMinor and currency. Stock has two states.
Import profiles: allkeyshop, kinguin and g2a.
Errors are RFC 9457 problem documents; rate limits use the IETF RateLimit headers.

Versioning

The major version is in the path (/api/partner/v2). Inside a major version we only add: new endpoints, new optional parameters, new fields and new values in lists we document as open (platforms, regions, destinations, currencies).
We never remove or rename a field, change a field's type or meaning, or tighten a limit inside a major version without 30 days' notice by email and in this changelog.
Ignore fields you do not know; that keeps your importer working through every minor release.
A new major version runs beside the old one for at least 6 months. The old one then answers with Deprecation and Sunset headers (RFC 9745, RFC 8594) until it is switched off, as v1 does now.