BYOAIK — Bring Your Own AI Key: a directory of AI tools that run on your own API key.

prompttools

Python library for experimenting with and unit-testing prompts, executed locally on your own keys.

Website Source code

Category:
Prompt Engineering Tools
Pricing:
Open Source
Open source:
Yes (Apache-2.0)
Self-hostable:
Yes
Local-first:
Yes
Platforms:
Library/SDK, CLI, Self-hosted, Docker
AI providers (bring your own key):
OpenAI, Anthropic, Hugging Face, Ollama
API key storage:
Configured by environment variable
Key risk level:
LOW
Trust score:
76/100

prompttools provides notebook and CLI experiment harnesses for testing and benchmarking prompts across providers and vector databases. It runs entirely on your machine: the project states that any call to LLM APIs is executed directly from your machine without forwarding, and examples set the provider key directly or through environment variables. Distributed as a Python package. Apache-2.0, 3,047 stars, last commit about six months before review.

Why this trust score (76/100)

Trust measures how the tool treats your API key and how much of that has been verified. It contains no popularity signal.

  • Key Safety 22/25 — The key is supplied by an environment variable or local config file you control.
  • Request Routing 17/20 — Requests go straight from you to the AI provider.
  • Transparency 20/20 — Source is public under Apache-2.0, so anyone can check how the key is handled.
  • Privacy 11/15 — Local-first: it works without sending your data anywhere. Can be self-hosted, so the data path stays inside infrastructure you control. Analytics or error-reporting libraries are present; what they send was not established.
  • Maintenance 5/10 — Last commit was within the last year.
  • Verification Confidence 1/10 — Compiled from public documentation by an AI-assisted pass, not independently confirmed.

What was checked

Verification tier: RESEARCH_ASSISTED — derived from the evidence below, not set by hand.

  • [STRONG · SOURCE_SCAN] Supports a local model backend, so it can run with no cloud provider key at all. source
  • [REPORTED · SOURCE_SCAN] References Sentry, so some analytics or error reporting is present. This scan cannot tell whether it is opt-in or what it sends. source
  • [CONFIRMED · SOURCE_SCAN] Most recent commit 2026-02-11 — about 6 month(s) ago. source

How your API key is handled

Your API key is supplied via an environment variable or local config file. Requests are sent directly to the AI provider. Because it can be self-hosted, your key never has to touch a third-party backend.

Setup

Install the tool, set your provider API key as an environment variable (or in its config file), and pick a model.