01 / REPLAY, DON’T PRETENDReal responses.
Real responses.
Repeatable tests.
Replay recorded HTTP and WebSocket traffic locally. No rate limits. No live credentials. No made-up fixtures.
Meet the mock server ↗ Open source. Out in the wild. Their API.
Their API.
Your rules.
Turn unpredictable APIs into typed Python clients, backed by real responses.
Less integration glue. More product.
✓ Free & open source✓ No account needed
THE OUTSIDE WORLD
RESTPages & payloads
WebSocketStreams & events
JSON-RPCRequests & replies
truewire
⌘
Typed clientActually means
✓Decimal✓
Replay testsReal data. Zero API calls.
✓✳
MCP toolsYour API, agent-ready.
✓ A little order in the API universe.
BUILT FROM PRODUCTION
Not a hypothetical pet store.
Extracted from a private system powering 14 API clients
across 3,638 endpoints. Now building in the open.
MEET YOUR NEW TRANSLATORThe wire is messy.
The wire is messy.
Your code doesn’t have to be.
Strings that are prices. Numbers that are dates.
Declare what the data means. Truewire handles
the translation, with runtime validation on by default.
No silent guessing. Wire types stay honest; your spec declares the meaning.
Get into the detailsONE SPEC. FEWER MOVING PARTS.Keep the quirks.
Keep the quirks.
Lose the workarounds.
The client, the mock, and the agent tools all start
from the same source. So you can spend your
time on what makes your product yours.
02 / DECLARE IT ONCEPagination without
Pagination without
the plumbing.
Declare pages, tokens, offsets, windows, or cursors in your spec. Generate the walker. Stop rewriting the same loop.
Explore the spec ↗03 / FOR YOUR AGENTS, TOOYour next integration.
Your next integration.
Your agent’s next tool.
Expose request/reply endpoints as MCP tools, backed by your generated client. Same schemas. Same validation.
Connect the pieces ↗LESS READING. MORE RUNNING.Start with one API.
Start with one API.
Make it yours.
Try the GitHub spec from the registry.
Generate a client, then replay its recorded examples
with a local mock.
# A familiar API. A better starting point.
$ pip install truewire
$ truewire init github_client
$ cd github_client
$ truewire import registry github
# Check. Generate. Replay.
$ truewire check
$ truewire generate python
$ pip install -e .
$ truewire mock↳ Your machine. Your code. Your call.
TWO WAYS TO GET THERETake the wheel.
Take the wheel.
Or hand us the keys.
Build with the open-source toolkit.
Or let us do the integration work while
your team ships the product.
FOR THE BUILDERS
The whole toolkit.
No toll booth.
Generate clients, validate responses, and run local mocks. Free to use, including commercially.
$0No seat limits. No subscription.
Start building ✓ Local-first✓ Open source✓ Your repository
FOR THE ALREADY-TOO-BUSYSPEC SERVICE
You bring the API.
We bring the working client.
A verified spec, generated Python client with tests, local mock, and checked docs. Delivered as a repo you own.
$2,000Starting at / API · scoped with you
Let’s scope your integration Tell us what you’re building. No commitment.
COMING LATER
Private specs. Managed publishing. Hosted mocks. Truewire Cloud.
Join the early-access list ↗BEFORE YOU PLUG INGood questions.
Good questions.
Straight answers.
Still curious about something?
Tell us what you need ↗Do I need an OpenAPI document?
No. Author a spec from real requests and responses, or import OpenAPI 3.0 / 3.1 to get a head start. Truewire is built for APIs you don’t own, including the ones with incomplete docs.
Is Truewire ready for my project?
The open-source release is alpha. Python generation, runtime validation, HTTP and WebSocket mocks, OpenAPI import, and MCP are available. The spec may change before 1.0. Start with one integration and review the generated code before adopting it.
Does it support TypeScript?
Not yet. Python is available today; TypeScript is next on the language roadmap. The spec format is language-neutral, so recorded examples are reusable across generators.
What leaves my machine?
The toolchain runs locally. Capture calls the upstream API you configure; the mock replays saved examples locally. There is no required Truewire account or hosted service. Review recordings for sensitive data before committing them.
What do I get with the spec service?
A repository you own: the spec, a generated Python client with tests, a mock server, and checked documentation. Pricing starts at $2,000 per API; scope depends on endpoint count, protocols, and access. Share the docs URL and we’ll scope it with you.