Chris Vouga


Local scripted OpenAI mock: chat/tool loops, SSE, embeddings, models, files and staged uploads without billed inference.

Stateful Amazon CloudWatch Logs emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Data Firehose emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Certificate Manager emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Kinesis Data Streams emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Key Management Service emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon CloudWatch Metrics emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Identity and Access Management emulator with AWS SDK wire compatibility and deterministic local controls.

Work-in-progress Amazon Elasticsearch Service transport scaffold; vendor operations are not implemented.

Stateful Kill Bill billing emulator with accounts, subscriptions, invoices, payments, credits, retries, catalog, and clock controls.

Stateful emulator of the LlamaCloud platform API: project and pipeline lookup, pipeline documents, and deterministic (scripted or term-overlap) retrieval, verified against the official llama_cloud_services SDK.

Stateful emulator of AWS Polly (SynthesizeSpeech, StartSpeechSynthesisStream) and Transcribe (streaming over h2c, batch jobs), with exact event-stream framing and scripted transcripts.

Local ElevenLabs text-to-speech emulator: decodable MP3 and raw PCM answers, scripted audio replies, vendor error envelopes and redacted call metadata without billed synthesis.

Stateful, scriptable emulator of AWS Bedrock Runtime (Converse, ConverseStream, InvokeModel incl. Titan embeddings, Nova Sonic bidirectional streams over h2c) and AgentCore InvokeHarness, with exact event-stream framing.

Pure TypeScript in-memory SQLite implementation with zero WASM/native dependencies

Pure TypeScript in-memory PostgreSQL implementation with zero WASM/native dependencies

Stateful emulator of the (retired) Optimal DX partner API: patients, partner links, HL7 and structured lab imports, Functional Health Reports (JSON/PDF), webhook registrations, and signed PatientTest webhooks.

Stateful emulator of Slack incoming webhooks, the Web API, and the Socket Mode control plane, with an outbox of every alert the app sent.

Stateful emulator of the Intercom REST API 2.11: contacts (search, create with 409 on duplicates, update, get), conversations (create with Idempotency-Key, reply as JSON or multipart, close/open, get, cursor search), admins, and X-Hub-Signature-signed adm

Stateful AHA phlebotomy emulator with signed HTTP orders, status webhooks, and a real deterministic SSH/SFTP result server.

Stateful emulator of the Fullscript lab-ordering API: per-practitioner OAuth, clinic, session grants, forward-only lab orders with results, lab-order events, expiring result PDFs, and Fullscript-Signature webhooks.

Stateful emulator of Customer.io: Segment-compatible CDP (identify/track/batch, SDK drop-in), App API transactional email/SMS/inbox sends with an outbox, message catalog, link-click tracking, and signed reporting webhooks.

Stateful emulator of the Persona identity-verification API: inquiry create, list (reusable lookup), get, a hosted flow page, admin lifecycle transitions, and Persona-Signature webhooks.

Stateful emulator of the Resend email API (send with idempotency, received emails, attachments) with an outbox and Svix-signed inbound webhooks (Mockingbird service contract).

Stateful emulator of the FirstPromoter v2 API: promoters (adopt-before-create by cust_id), signup tracking by tid / promoter_id / ref token, iframe login, archive, and Basic-auth lead_becomes_referral webhooks.

Stateful emulator of the Flex HSA/FSA payments API: products (recorded catalog corpus), checkout sessions in payment, subscription, off-session and setup modes, subscriptions, customers, setup intents, refunds, the hosted checkout page, and Svix-signed we

Stateful emulator of the Daily.co REST API: rooms, presence, eject, meeting tokens (minted and self-signed HS256, verified and decodable), and transcription/recording webhooks with transcripts written to S3.

Stateful emulator of the Paddle Billing API (customers, addresses, businesses, products, prices, transactions with computed totals, subscriptions with pause/resume/cancel and renewals, events) with Paddle-Signature webhooks and admin routes that simulate

Stateful emulator of the RxVortex (Strive) pharmacy API: OAuth token, order submit, status, cancel, recovery by sender order id, preset catalog, and signed status webhooks.

Stateful emulator of the Pharmetika compounding-pharmacy provider portal: clinics, patients, medication-order validate / EPCS prepare / submit / lookup, the v7 cancel, the medication-template catalog, and status webhooks.

Stateful Amazon Cognito User Pools emulator for AWS SDK and browser authentication tests.

Stateful Amazon Certificate Manager emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon CloudWatch Metrics emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon CloudWatch Logs emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Data Firehose emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Simple Notification Service emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon EventBridge Scheduler emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Resource Groups emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Identity and Access Management emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Simple Email Service emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Systems Manager Parameter Store emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Key Management Service emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Security Token Service emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Kinesis Data Streams emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon Resource Groups Tagging API emulator with AWS SDK wire compatibility and deterministic local controls.

Stateful Amazon S3 emulator with binary objects, listing, copies, multipart uploads, presigned URLs, and canonical XML errors.

Stateful LiveKit emulator with Twirp room APIs, JWT grants, participants, data, SIP/egress controls, and signed webhooks.

Stateful AWS Secrets Manager and SSM Parameter Store emulator with versions, stages, rotation, and redacted controls.

Stateful Amazon DynamoDB emulator with typed items, expressions, indexes, pagination, transactions, and streams.

Stateful emulator of the Firebase Cloud Messaging HTTP v1 send API used by firebase-admin: fixture projects and registration tokens, an outbox, and a device inbox.

AWS ECS Fargate RunTask acceptance and failure emulator.

Stateful Amazon SQS emulator with visibility, FIFO ordering, deduplication, batches, and redrive.

Stateful AWS Step Functions emulator with idempotent executions, callbacks, deterministic transitions, and history.

Social-login emulator with Google, Apple, Microsoft, GitHub and generic OIDC profiles, private relay identities, reproducible edge cases, signed tokens and an accessible UI.

Stateful emulator of the Google Calendar v3 API and Google OAuth our EMR calls: events list/insert/update/delete/watch, channels.stop, calendarList/calendars, token exchange/refresh/revoke and userinfo, with signed-by-header push notifications.

Stateful emulator of the Healthie GraphQL API (legacy surface): signIn, users, currentUser, updateUser/updateClient (incl. multipart avatar), locations, documents and folders with served downloads, form answers, offerings, billing items, and the IP-allowl

Stateful emulator of Twilio Verify, Lookup v2, Messaging and Recordings on one port, with signed inbound SMS and voice webhooks (Mockingbird service contract).

Stateful emulator of PostHog: /flags v2 and legacy /decide evaluation with per-test flag, variant and payload control, remote config, gzip/base64 capture (/batch/, /e/, /i/v0/e/), recordings intake, and the feature-flag management and HogQL API slice.

In-process Redis RESP server for tests: strings, hashes, lists, sets, sorted sets, streams, transactions, pub/sub, and a Lua subset, with an injected clock. Not an HTTP emulator.

Work-in-progress Amazon Elasticsearch Service transport scaffold; vendor operations are not implemented.

Stateful emulator of the Payload CMS collection REST API: paginated finds with a where-query subset, find by id, a seeded marketing collection and admin-editable documents.

Stateful Docker Engine API v1.52 emulator with portable controls and Node transport.