DepTime

Name: DepTime
Author: cschmertz

by cschmertzversion 0.1.7i★ –iRuns on your computer

Registry nameio.github.cschmertz/deptime

Install

Overview

Description from the maker (original English)

What changed in a Python library, in which release, and what replaces it. Answered locally.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: DEPTIME_OFFLINE, DEPTIME_HOME

You need

PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "deptime": {
      "command": "uvx",
      "args": [
        "deptime",
        "mcp"
      ],
      "env": {
        "DEPTIME_OFFLINE": "your-value",
        "DEPTIME_HOME": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add deptime --env DEPTIME_OFFLINE=your-value --env DEPTIME_HOME=your-value -- uvx deptime mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "deptime": {
      "command": "uvx",
      "args": [
        "deptime",
        "mcp"
      ],
      "env": {
        "DEPTIME_OFFLINE": "your-value",
        "DEPTIME_HOME": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "deptime": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "deptime",
        "mcp"
      ],
      "env": {
        "DEPTIME_OFFLINE": "your-value",
        "DEPTIME_HOME": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

DEPTIME_OFFLINE env
Set to 1 to never touch the network: no index download and no daily update check.
DEPTIME_HOME env
Where the index is stored. Defaults to ~/.cache/deptime.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account cschmertz, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32683 servers in this category
Published to the registry more recently than 99% of the other 32683 servers in this category
Basic checks equal to or better than 100% of the other 32683 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is DepTime safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.7) reached the registry today.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, MCP Server Autocad Lisp Helper

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

An API time machine for Python libraries, built for coding agents.

When an agent hits ImportError, AttributeError or "unexpected keyword argument" in a fast-moving library, one call to DepTime says what changed, in which release, and what to use instead. Answers are computed from static diffs of every indexed release, not from docs or model memory.

Free, open source (MIT), and local: your code and errors never leave your machine.

Every night, GitHub Actions reads each new release's public API with griffe, which parses the source without running it, diffs it against the previous release, and publishes the result as one file, index.sqlite.xz, on this repo's Releases. On your machine, deptime mcp checks that file's sha256 and schema before swapping it in, then answers every question locally in milliseconds. The full design is in docs/04-architecture.md, and the decisions are in docs/adr/.

TypeError: Client.__init__() got an unexpected keyword argument 'proxies'

"symbol": "httpx.Client.init(proxies)", "issue": "param_removed", "installed_version": "0.28.1", "last_version_with": "0.27.2", "first_version_without": "0.28.0", "deprecated_in": "0.26.0", "replacements": [ {"target": "proxy", "confidence": 0.8, "source": "deprecation_message"}, {"target": "mounts", "confidence": 0.79, "source": "deprecation_message"} ], "pin_to_restore": "httpx<=0.27.2", "confidence": "high" }

That's the real explain_error answer from the published index, trimmed. The full answer also quotes the deprecation message DepTime found in httpx's own source, and adds a one-sentence explanation for your agent to pass on.

Status: alpha. The prebuilt index is rebuilt twice a day. Known gaps are tracked in BACKLOG.md.

How well it works

Each check's right answers were written down before DepTime first ran on it (bench/). Judge DepTime by the first run: the fixes since then were designed from its misses, so the later numbers are flattering.

Check	Cases	First run	Now
Right package, name and breaking release for a traceback from a GitHub issue	32 collected 2026-11-05	68.8%	96.9%
The same, on a holdout fixed in advance from TimeMachine-bench	29	72.4%	93.1%
Error kind and package read from the traceback: scripts, pytest, chained exceptions, `ExceptionGroup`, IPython, Python 3.10–3.14	736, holdout fixed in advance	93.8%	93.8%
Replacement hints at confidence ≥ 0.75 that are right	hints for 50 documented migrations	11 of 11	42 of 45
Documented migrations that get a right hint at ≥ 0.75	50	11	42 (32 without hand-checked hints from migration guides)
Names that exist at runtime but read as absent	2,428 sampled at runtime from 10 dynamic packages	5.1%	1.2%

Across all 196 real tracebacks in the benchmark, including the ones fixes were designed from, DepTime names the right package, name and release for 98.0%, and a right replacement is among its first three for 68.1%. CI re-scores the 196 and the holdout on every code change and every published index, and fails on a drop of more than 2 points.

Install

Requires uv.

# Claude Code. Cursor, Codex, VS Code and Claude Desktop take the same

command (uvx deptime mcp) in their MCP config.

claude mcp add deptime -- uvx deptime mcp

On first launch DepTime downloads its prebuilt index (one file from this repo's GitHub Releases) in the background, then checks for a newer one at most once a day. Set DEPTIME_OFFLINE=1 to never touch the network.

Claude Code users can also install the plugin in integrations/claude-code with /plugin marketplace add cschmertz/deptime, then /plugin install deptime@deptime. It adds a skill and a local hook that suggests DepTime when a Python version-change error appears in a command's output.

First launch timing out? uvx installs DepTime the first time a client starts it. On macOS with an x86_64 uv (an Intel Mac, or Intel Homebrew on Apple silicon), one dependency, cryptography, has no prebuilt wheel and is compiled, which can take longer than a client waits for a server to start. Run uvx deptime --help once beforehand.

Client compatibility

Checked 2026-11-05 with deptime 0.1.4 (details):

Client	Result
Claude Code 2.1.318	✅
Codex CLI 0.166.0	✅
MCP Python SDK clients 1.0–1.30 and TypeScript SDK clients 1.0–1.32 (protocols 2024-11-05 to 2025-11-25), over stdio and against `deptime serve`	✅
Cursor, VS Code, Claude Desktop	not checked yet; they take the same `uvx deptime mcp` command

Tools

Tool	Use it when
`explain_error(traceback, installed_versions?, pip_freeze?)`	An import or call into a library just failed
`symbol_history(package, path)`	Before trusting an API you remember
`check_symbols(package, version, symbols[{path, kwargs}])`	Pre-flight check of the symbols and kwargs you're about to use
`diff_versions(package, from_version \	date, to_version?, used_symbols?)`	Upgrading, or "what changed since my training cutoff?"
`coverage()`	What's indexed (53 fast-moving packages: AI/agent stack + libraries with known breaking changes)

Every answer carries evidence and a confidence level. If a package isn't covered, DepTime says so instead of guessing. The contracts are in docs/03-product-spec.md.

CLI

uvx deptime explain --installed httpx==0.28.1 < traceback.txt

uvx deptime history httpx Client.init uvx deptime check httpx 0.28.1 'httpx.Client:proxies,proxy' uvx deptime diff httpx 0.27.2 0.28.1 uvx deptime diff pydantic 2024-06-01 # everything since a date uvx deptime index status | pull

Hosting (optional)

Local mode covers coding agents. For web clients that only accept a URL, run deptime serve (MCP at /mcp, JSON at /v1/*) on any container host. The repo includes a Dockerfile and fly.toml, and the server applies anonymous rate limits. See docs/05-self-hosting.md.

Prior art and credits

griffe does the static analysis.
since-cutoff diffs your pinned dependencies against a model's training cutoff, locally and on demand. DepTime differs by shipping a prebuilt cross-version index and starting from a traceback.
Context7 and Ref serve version-specific docs. DepTime answers symbol-level "when and what replaced it" questions.

Contributing

The most useful contributions are wrong-answer reports, which become benchmark cases. See CONTRIBUTING.md. Development setup:

uv sync && uv run pytest

build a small local index from real PyPI wheels

uv run deptime ingest httpx --versions 0.27.2 0.28.1

Docs

Product spec · Architecture · Self-hosting · Risks & spikes · Privacy & security

License

MIT

DepTime

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

MCP Server Autocad Lisp Helper

README from the maker

How well it works

Install

command (uvx deptime mcp) in their MCP config.

Client compatibility

Tools

CLI

Hosting (optional)

Prior art and credits

Contributing

build a small local index from real PyPI wheels

Docs

License