SMAPI.Web contains the code for the smapi.io website, including the mod compatibility list and update check API.

Log parser

The log parser at https://smapi.io/log provides a web UI for uploading, parsing, and sharing SMAPI logs.

The logs are saved in a compressed form to Amazon Blob storage for 30 days.

JSON validator

Overview

The JSON validator at https://smapi.io/json provides a web UI for uploading and sharing JSON files, and validating them as plain JSON or against a predefined format like manifest.json or Content Patcher's content.json.

The logs are saved in a compressed form to Amazon Blob storage for 30 days.

Schema file format

Schema files are defined in wwwroot/schemas using the JSON Schema format. The JSON validator UI recognises a superset of the standard fields to change output:

Documentation URL

The root schema may have a @documentationURL field, which is a web URL for the user documentation:

"@documentationUrl": "https://stardewvalleywiki.com/Modding:Modder_Guide/APIs/Manifest"

If present, this is shown in the JSON validator UI.

Error messages

Any part of the schema can define an @errorMessages field, which overrides matching schema errors. You can override by error code (recommended), or by error type and a regex pattern matched against the error message (more fragile):

// by error type
"pattern": "^[a-zA-Z0-9_.-]+\\.dll$",
"@errorMessages": {
   "pattern": "Invalid value; must be a filename ending with .dll."
}

// by error type + message pattern
"@errorMessages": {
   "oneOf:valid against no schemas": "Missing required field: EntryDll or ContentPackFor.",
   "oneOf:valid against more than one schema": "Can't specify both EntryDll or ContentPackFor, they're mutually exclusive."
}

Error messages may contain special tokens:

The @value token is replaced with the error's value field. This is usually (but not always) the original field value.

When an error has child errors, by default they're flattened into one message:

line | field      | error
---- | ---------- | -------------------------------------------------------------------------
4    | Changes[0] | JSON does not match schema from 'then'.
     |            |   ==> Changes[0].ToArea.Y: Invalid type. Expected Integer but got String.
     |            |   ==> Changes[0].ToArea: Missing required fields: Height.

If you set the message for an error to $transparent, the parent error is omitted entirely and the child errors are shown instead:

line | field               | error
---- | ------------------- | ----------------------------------------------
8    | Changes[0].ToArea.Y | Invalid type. Expected Integer but got String.
8    | Changes[0].ToArea   | Missing required fields: Height.

The child errors themselves may be marked $transparent, etc. If an error has no child errors, this override is ignored.

Validation errors for then blocks are transparent by default, unless overridden.

Using a schema file directly

You can reference the validator schemas in your JSON file directly using the $schema field, for text editors that support schema validation. For example:

{
   "$schema": "https://smapi.io/schemas/manifest.json",
   "Name": "Some mod",
   ...
}

Available schemas:

format	schema URL
SMAPI: `manifest.json`	https://smapi.io/schemas/manifest.json
SMAPI: translations (`i18n` folder)	https://smapi.io/schemas/i18n.json
Content Patcher: `content.json`	https://smapi.io/schemas/content-patcher.json

Web API

Overview

SMAPI provides a web API at smapi.io/api for use by SMAPI and external tools. The URL includes a {version} token, which is the SMAPI version for backwards compatibility. This API is publicly accessible but not officially released; it may change at any time.

`/mods` endpoint

The API has one /mods endpoint. This crossreferences the mod against a variety of sources (e.g. the wiki, Chucklefish, CurseForge, ModDrop, and Nexus) to provide metadata mainly intended for update checks.

The API accepts a POST request with these fields:

field summary

mods

The mods for which to fetch metadata. Included fields:

field	summary
`id`	The unique ID in the mod's `manifest.json`. This is used to crossreference with the wiki, and to index mods in the response. If it's unknown (e.g. you just have an update key), you can use a unique fake ID like `FAKE.Nexus.2400`.
`updateKeys`	(optional) Update keys which specify the mod pages to check, in addition to any mod pages linked to the `ID`.
`installedVersion`	(optional) The installed version of the mod. If not specified, the API won't recommend an update.
`isBroken`	(optional) Whether SMAPI failed to load the installed version of the mod, e.g. due to incompatibility. If true, the web API will be more permissive when recommending updates (e.g. allowing a stable → prerelease update).

apiVersion

(optional) The installed version of SMAPI. If not specified, the API won't recommend an update.

gameVersion

(optional) The installed version of Stardew Valley. This may be used to select updates.

platform

(optional) The player's OS (Android, Linux, Mac, or Windows). This may be used to select updates.

includeExtendedMetadata

(optional) Whether to include extra metadata that's not needed for SMAPI update checks, but which may be useful to external tools.

Example request:

POST https://smapi.io/api/v3.0/mods
{
   "mods": [
      {
         "id": "Pathoschild.ContentPatcher",
         "updateKeys": [ "nexus:1915" ],
         "installedVersion": "1.9.2",
         "isBroken": false
      }
   ],
   "apiVersion": "3.0.0",
   "gameVersion": "1.4.0",
   "platform": "Windows",
   "includeExtendedMetadata": true
}

Response fields:

field summary

id

The mod ID you specified in the request.

suggestedUpdate

The update version recommended by the web API, if any. This is based on some internal rules (e.g. it won't recommend a prerelease update if the player has a working stable version) and context (e.g. whether the player is in the game beta channel). Choosing an update version yourself isn't recommended, but you can set includeExtendedMetadata: true and check the metadata field if you really want to do that.

errors

Human-readable errors that occurred fetching the version info (e.g. if a mod page has an invalid version).

metadata

Extra metadata that's not needed for SMAPI update checks but which may be useful to external tools, if you set includeExtendedMetadata: true in the request. Included fields:

field	summary
`id`	The known `manifest.json` unique IDs for this mod defined on the wiki, if any. That includes historical versions of the mod.
`name`	The normalised name for this mod based on the crossreferenced sites.
`nexusID`	The mod ID on Nexus Mods, if any.
`chucklefishID`	The mod ID in the Chucklefish mod repo, if any.
`curseForgeID`	The mod project ID on CurseForge, if any.
`curseForgeKey`	The mod key on CurseForge, if any. This is used in the mod page URL.
`modDropID`	The mod ID on ModDrop, if any.
`gitHubRepo`	The GitHub repository containing the mod code, if any. Specified in the `Owner/Repo` form.
`customSourceUrl`	The custom URL to the mod code, if any. This is used for mods which aren't stored in a GitHub repo.
`customUrl`	The custom URL to the mod page, if any. This is used for mods which aren't stored on one of the standard mod sites covered by the ID fields.
`main`	The primary mod version, if any. This depends on the mod site, but it's typically either the version of the mod itself or of its latest non-optional download.
`optional`	The latest optional download version, if any.
`unofficial`	The version of the unofficial update defined on the wiki for this mod, if any.
`unofficialForBeta`	Equivalent to `unofficial`, but for beta versions of SMAPI or Stardew Valley.
`hasBetaInfo`	Whether there's an ongoing Stardew Valley or SMAPI beta which may affect update checks.
`compatibilityStatus`	The compatibility status for the mod for the stable version of the game, as defined on the wiki, if any. See possible values.
`compatibilitySummary`	The human-readable summary of the mod's compatibility in HTML format, if any.
`brokeIn`	The SMAPI or Stardew Valley version that broke this mod, if any.
`betaCompatibilityStatus` `betaCompatibilitySummary` `betaBrokeIn`	Equivalent to the preceding fields, but for beta versions of SMAPI or Stardew Valley.

Example response with includeExtendedMetadata: false:

[
   {
      "id": "Pathoschild.ContentPatcher",
      "suggestedUpdate": {
         "version": "1.10.0",
         "url": "https://www.nexusmods.com/stardewvalley/mods/1915"
      },
      "errors": []
   }
]

Example response with includeExtendedMetadata: true:

[
   {
      "id": "Pathoschild.ContentPatcher",
      "suggestedUpdate": {
         "version": "1.10.0",
         "url": "https://www.nexusmods.com/stardewvalley/mods/1915"
      },
      "metadata": {
         "id": [ "Pathoschild.ContentPatcher" ],
         "name": "Content Patcher",
         "nexusID": 1915,
         "curseForgeID": 309243,
         "curseForgeKey": "content-patcher",
         "modDropID": 470174,
         "gitHubRepo": "Pathoschild/StardewMods",
         "main": {
            "version": "1.10",
            "url": "https://www.nexusmods.com/stardewvalley/mods/1915"
         },
         "hasBetaInfo": true,
         "compatibilityStatus": "Ok",
         "compatibilitySummary": "✓ use latest version."
      },
      "errors": []
   }
]

Short URLs

The SMAPI web services provides a few short URLs for convenience:

short url	→	target page
smapi.io/3.0	→	stardewvalleywiki.com/Modding:Migrate_to_SMAPI_3.0
smapi.io/community	→	stardewvalleywiki.com/Modding:Community
smapi.io/docs	→	stardewvalleywiki.com/Modding:Index
smapi.io/package	→	github.com/Pathoschild/SMAPI/blob/develop/docs/technical/mod-package.md
smapi.io/troubleshoot	→	stardewvalleywiki.com/Modding:Player_Guide/Troubleshooting
smapi.io/xnb	→	stardewvalleywiki.com/Modding:Using_XNB_mods

For SMAPI developers

Local environment

A local environment lets you run a complete copy of the web project (including cache database) on your machine, with no external dependencies aside from the actual mod sites.

Edit appsettings.Development.json and set these options:

property name	description
`NexusApiKey`	Your Nexus API key.

Optional settings:

property name	description
`AzureBlobConnectionString`	The connection string for the Azure Blob storage account. Defaults to using the system's temporary file folder if not specified.
`GitHubUsername` `GitHubPassword`	The GitHub credentials with which to query GitHub release info. Defaults to anonymous requests if not specified.

Launch SMAPI.Web from Visual Studio to run a local version of the site.

Production environment

A production environment includes the web servers and cache database hosted online for public access.

This section assumes you're creating a new environment on Azure, but the app isn't tied to any Azure services. If you want to host it on a different site, you'll need to adjust the instructions accordingly.

Initial setup:

Create an Azure Blob storage account for uploaded files.
Create an Azure App Services environment running the latest .NET on Linux or Windows.

Add these application settings in the new App Services environment:

property name	description
`ApiClients.AzureBlobConnectionString`	The connection string for the Azure Blob storage account created in step 2.
`ApiClients.GitHubUsername` `ApiClients.GitHubPassword`	The login credentials for the GitHub account with which to fetch release info. If these are omitted, GitHub will impose much stricter rate limits.
`ApiClients:NexusApiKey`	The Nexus API authentication key.

Optional settings:

property name	description
`BackgroundServices:Enabled`	Set to `true` to enable background processes like fetching data from the wiki, or false to disable them.
`Site:BetaEnabled`	Set to `true` to show a separate download button if there's a beta version of SMAPI in its GitHub releases.
`Site:BetaBlurb`	If `Site:BetaEnabled` is true and there's a beta version of SMAPI in its GitHub releases, this is shown on the beta download button as explanatory subtext.
`Site:SupporterList`	A list of Patreon supports to credit on the download page.

To deploy updates, just redeploy the web project from Visual Studio.

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web.md

web.md

Contents

Log parser

JSON validator

Overview

Schema file format

Using a schema file directly

Web API

Overview

`/mods` endpoint

Short URLs

For SMAPI developers

Local environment

Production environment

Files

web.md

Latest commit

History

web.md

File metadata and controls

Contents

Log parser

JSON validator

Overview

Schema file format

Using a schema file directly

Web API

Overview

/mods endpoint

Short URLs

For SMAPI developers

Local environment

Production environment

`/mods` endpoint