S3, SQS, IAM, and STS emulation with AWS SDK-compatible S3 paths and query-style SQS/IAM/STS endpoints. All responses use AWS-compatible XML.

Microsoft Entra ID (Azure AD) v2.0 OAuth 2.0 and OpenID Connect emulation with authorization code flow, PKCE, client credentials, RS256 ID tokens, and OIDC discovery.

Sign in with Apple emulation with authorization code flow, PKCE support, RS256 ID tokens, and OIDC discovery.

Fully stateful GitHub API emulation. Creates, updates, and deletes persist in memory and affect related entities.

Local drop-in replacement services for CI and no-network sandboxes

MongoDB Atlas emulation with Atlas Admin API v2 and Atlas Data API v1 for local development and testing. In-memory document storage with CRUD, filtering, and aggregation.

Okta identity provider emulation with OAuth 2.0 / OIDC, user management, groups, apps, and authorization servers.

Stripe API emulation with customers, payment methods, customer sessions, payment intents, charges, products, prices, and checkout sessions. Includes a hosted checkout page and webhook delivery.

Resend email API emulation with email sending, domain management, API keys, audiences, contacts, and a local inbox for captured messages.

Google OAuth 2.0, OpenID Connect, and mutable Google Workspace-style surfaces for local Gmail, Calendar, and Drive flows.

Fully stateful Vercel API emulation with Vercel-style JSON responses and cursor-based pagination.

HTTP server, in-memory store, plugin interface, and middleware for emulate service plugins.

Twilio API emulator for local development and CI. Part of [emulate](https://github.com/pompeii-labs/emulate).

Stateful Linear GraphQL API emulator for local development and CI.

Nuxt server route integration for emulate. Embed emulators directly into your Nuxt app so they run on the same origin, which keeps OAuth callbacks stable for preview deployments.

Fully stateful Slack Web API emulation with channels, messages, threads, reactions, user profiles, presence, modern file uploads, pins, bookmarks, views, OAuth v2, and incoming webhooks. Chat writes preserve common rich message fields such as `blocks`, `a