feat: add chomp API service

.github/CODEOWNERS

@@ -40,6 +40,7 @@
 ## Earn Team
 /packages/earn-controller                   @MetaMask/earn
 /packages/money-account-balance-service     @MetaMask/earn
+/packages/chomp-api-service                 @MetaMask/earn @MetaMask/delegation
 
 ## Social AI Team
 /packages/ai-controllers                    @MetaMask/social-ai
@@ -229,3 +230,5 @@
 /packages/social-controllers/CHANGELOG.md @MetaMask/social-ai @MetaMask/core-platform
 /packages/money-account-controller/package.json @MetaMask/accounts-engineers @MetaMask/core-platform
 /packages/money-account-controller/CHANGELOG.md @MetaMask/accounts-engineers @MetaMask/core-platform
+/packages/chomp-api-service/package.json @MetaMask/earn @MetaMask/delegation @MetaMask/core-platform
+/packages/chomp-api-service/CHANGELOG.md @MetaMask/earn @MetaMask/delegation @MetaMask/core-platform

README.md

@@ -37,6 +37,7 @@ Each package in this repository has its own README where you can find installati
 - [`@metamask/bridge-status-controller`](packages/bridge-status-controller)
 - [`@metamask/build-utils`](packages/build-utils)
 - [`@metamask/chain-agnostic-permission`](packages/chain-agnostic-permission)
+- [`@metamask/chomp-api-service`](packages/chomp-api-service)
 - [`@metamask/claims-controller`](packages/claims-controller)
 - [`@metamask/client-controller`](packages/client-controller)
 - [`@metamask/compliance-controller`](packages/compliance-controller)
@@ -124,6 +125,7 @@ linkStyle default opacity:0.5
   bridge_status_controller(["@metamask/bridge-status-controller"]);
   build_utils(["@metamask/build-utils"]);
   chain_agnostic_permission(["@metamask/chain-agnostic-permission"]);
+  chomp_api_service(["@metamask/chomp-api-service"]);
   claims_controller(["@metamask/claims-controller"]);
   client_controller(["@metamask/client-controller"]);
   compliance_controller(["@metamask/compliance-controller"]);
@@ -277,6 +279,9 @@ linkStyle default opacity:0.5
   bridge_status_controller --> transaction_controller;
   chain_agnostic_permission --> controller_utils;
   chain_agnostic_permission --> permission_controller;
+  chomp_api_service --> base_data_service;
+  chomp_api_service --> controller_utils;
+  chomp_api_service --> messenger;
   claims_controller --> base_controller;
   claims_controller --> controller_utils;
   claims_controller --> keyring_controller;

packages/chomp-api-service/CHANGELOG.md

@@ -0,0 +1,14 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+
+- Add `ChompApiService` ([#8413](https://github.com/MetaMask/core/pull/8413))
+
+[Unreleased]: https://github.com/MetaMask/core/

packages/chomp-api-service/LICENSE

@@ -0,0 +1,20 @@
+MIT License
+
+Copyright (c) 2026 MetaMask
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

packages/chomp-api-service/README.md

@@ -0,0 +1,15 @@
+# `@metamask/chomp-api-service`
+
+Chomp API data service.
+
+## Installation
+
+`yarn add @metamask/chomp-api-service`
+
+or
+
+`npm install @metamask/chomp-api-service`
+
+## Contributing
+
+This package is part of a monorepo. Instructions for contributing can be found in the [monorepo README](https://github.com/MetaMask/core#readme).

packages/chomp-api-service/jest.config.js

@@ -0,0 +1,26 @@
+/*
+ * For a detailed explanation regarding each configuration property and type check, visit:
+ * https://jestjs.io/docs/configuration
+ */
+
+const merge = require('deepmerge');
+const path = require('path');
+
+const baseConfig = require('../../jest.config.packages');
+
+const displayName = path.basename(__dirname);
+
+module.exports = merge(baseConfig, {
+  // The display name when running multiple projects
+  displayName,
+
+  // An object that configures minimum threshold enforcement for coverage results
+  coverageThreshold: {
+    global: {
+      branches: 100,
+      functions: 100,
+      lines: 100,
+      statements: 100,
+    },
+  },
+});

packages/chomp-api-service/package.json

@@ -0,0 +1,76 @@
+{
+  "name": "@metamask/chomp-api-service",
+  "version": "0.0.0",
+  "description": "Data service for the Chomp API",
+  "keywords": [
+    "Ethereum",
+    "MetaMask"
+  ],
+  "homepage": "https://github.com/MetaMask/core/tree/main/packages/chomp-api-service#readme",
+  "bugs": {
+    "url": "https://github.com/MetaMask/core/issues"
+  },
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/MetaMask/core.git"
+  },
+  "files": [
+    "dist/"
+  ],
+  "sideEffects": false,
+  "main": "./dist/index.cjs",
+  "types": "./dist/index.d.cts",
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./dist/index.d.mts",
+        "default": "./dist/index.mjs"
+      },
+      "require": {
+        "types": "./dist/index.d.cts",
+        "default": "./dist/index.cjs"
+      }
+    },
+    "./package.json": "./package.json"
+  },
+  "publishConfig": {
+    "access": "public",
+    "registry": "https://registry.npmjs.org/"
+  },
+  "scripts": {
+    "build": "ts-bridge --project tsconfig.build.json --verbose --clean --no-references",
+    "build:all": "ts-bridge --project tsconfig.build.json --verbose --clean",
+    "build:docs": "typedoc",
+    "changelog:update": "../../scripts/update-changelog.sh @metamask/chomp-api-service",
+    "changelog:validate": "../../scripts/validate-changelog.sh @metamask/chomp-api-service",
+    "since-latest-release": "../../scripts/since-latest-release.sh",
+    "test": "NODE_OPTIONS=--experimental-vm-modules jest --reporters=jest-silent-reporter",
+    "test:clean": "NODE_OPTIONS=--experimental-vm-modules jest --clearCache",
+    "test:verbose": "NODE_OPTIONS=--experimental-vm-modules jest --verbose",
+    "test:watch": "NODE_OPTIONS=--experimental-vm-modules jest --watch"
+  },
+  "dependencies": {
+    "@metamask/base-data-service": "^0.1.1",
+    "@metamask/controller-utils": "^11.20.0",
+    "@metamask/messenger": "^1.1.1",
+    "@metamask/superstruct": "^3.1.0",
+    "@metamask/utils": "^11.9.0",
+    "@tanstack/query-core": "^4.43.0"
+  },
+  "devDependencies": {
+    "@metamask/auto-changelog": "^6.1.0",
+    "@ts-bridge/cli": "^0.6.4",
+    "@types/jest": "^29.5.14",
+    "deepmerge": "^4.2.2",
+    "jest": "^29.7.0",
+    "nock": "^13.3.1",
+    "ts-jest": "^29.2.5",
+    "typedoc": "^0.25.13",
+    "typedoc-plugin-missing-exports": "^2.0.0",
+    "typescript": "~5.3.3"
+  },
+  "engines": {
+    "node": "^18.18 || >=20"
+  }
+}

packages/chomp-api-service/src/chomp-api-service-method-action-types.ts

@@ -0,0 +1,83 @@
+/**
+ * This file is auto generated.
+ * Do not edit manually.
+ */
+
+import type { ChompApiService } from './chomp-api-service';
+
+/**
+ * Associates an address with a CHOMP profile via POST /v1/auth/address.
+ */
+export type ChompApiServiceAssociateAddressAction = {
+  type: `ChompApiService:associateAddress`;
+  handler: ChompApiService['associateAddress'];
+};
+
+/**
+ * Creates an account upgrade via POST /v1/account-upgrade.
+ */
+export type ChompApiServiceCreateUpgradeAction = {
+  type: `ChompApiService:createUpgrade`;
+  handler: ChompApiService['createUpgrade'];
+};
+
+/**
+ * Fetches the upgrade record for an address via GET /v1/account-upgrade/:address.
+ */
+export type ChompApiServiceGetUpgradeAction = {
+  type: `ChompApiService:getUpgrade`;
+  handler: ChompApiService['getUpgrade'];
+};
+
+/**
+ * Verifies a delegation via POST /v1/intent/verify-delegation.
+ */
+export type ChompApiServiceVerifyDelegationAction = {
+  type: `ChompApiService:verifyDelegation`;
+  handler: ChompApiService['verifyDelegation'];
+};
+
+/**
+ * Submits intents via POST /v1/intent.
+ */
+export type ChompApiServiceCreateIntentsAction = {
+  type: `ChompApiService:createIntents`;
+  handler: ChompApiService['createIntents'];
+};
+
+/**
+ * Fetches intents by address via GET /v1/intent/account/:address.
+ */
+export type ChompApiServiceGetIntentsByAddressAction = {
+  type: `ChompApiService:getIntentsByAddress`;
+  handler: ChompApiService['getIntentsByAddress'];
+};
+
+/**
+ * Creates a withdrawal for card spend flows.
+ */
+export type ChompApiServiceCreateWithdrawalAction = {
+  type: `ChompApiService:createWithdrawal`;
+  handler: ChompApiService['createWithdrawal'];
+};
+
+/**
+ * Retrieves service details via GET /v1/chomp.
+ */
+export type ChompApiServiceGetServiceDetailsAction = {
+  type: `ChompApiService:getServiceDetails`;
+  handler: ChompApiService['getServiceDetails'];
+};
+
+/**
+ * Union of all ChompApiService action types.
+ */
+export type ChompApiServiceMethodActions =
+  | ChompApiServiceAssociateAddressAction
+  | ChompApiServiceCreateUpgradeAction
+  | ChompApiServiceGetUpgradeAction
+  | ChompApiServiceVerifyDelegationAction
+  | ChompApiServiceCreateIntentsAction
+  | ChompApiServiceGetIntentsByAddressAction
+  | ChompApiServiceCreateWithdrawalAction
+  | ChompApiServiceGetServiceDetailsAction;