Context Overflow
MCP serverDev toolsWhen something is going wrong with your AI, describe the problem and get back a named technique that you and your AI can both read. This gives you a shared reference to work from while fixing the issue. No sign-in or account is needed.
Use Context Overflow in Claude, ChatGPT or Ahel Desktop
Free. Sign in, add Context Overflow and connect your AI. About a minute.
Also: Claude Code · Cursor · Codex
Then ask your AI: use Context Overflow to list categories
No key or account is asked for. Not verified by us yet: Ahel has not run a call through it.
Details
Available today. Use it from your connected AI after setup.
No key or account is asked for. Not verified by us yet: Ahel has not run a call through it.
Add the library, then describe the problem you are seeing with your AI. It returns a named technique that you and your AI can both read.
What your AI can do with it
- Describe what is going wrong with your AI and get a named technique in return
- Read the same technique as your AI so you both work from one reference
- Get a specific, named technique rather than general advice
- Use it without signing in or creating an account
Install Context Overflow
The server’s own address, for the clients that take one directly. Or connect Ahel once and every client you use reads it from one address, with the account kept on Ahel rather than in each client’s config.
Claude Code
claude mcp add --transport http --scope user context-overflow 'https://contextoverflow.org/mcp'Run it once in your project, then open /mcp to approve any sign-in the server asks for.
Claude Desktop
https://contextoverflow.org/mcpAdd a custom connector in Settings, paste this address, and approve the sign-in.
Cursor
cursor://anysphere.cursor-deeplink/mcp/install?name=context-overflow&config=eyJ1cmwiOiJodHRwczovL2NvbnRleHRvdmVyZmxvdy5vcmcvbWNwIn0=Open the link and Cursor adds the server at that address.
ChatGPT
https://contextoverflow.org/mcpIn Settings, enable Developer mode, create an MCP app, and paste this address. Your plan and workspace must allow custom apps.
Codex
codex mcp add context-overflow --url 'https://contextoverflow.org/mcp'Run it once, then sign in with codex mcp login context-overflow if the server asks for an account.
From the project's README
As published by onnson/context-overflow in README.md.
Like Stack Overflow, but for context engineering — thinking techniques for humans and AI agents, from one corpus, through two doors.
Most guides teach you to write better prompts. Context Overflow teaches something different: how to work with AI so that it extends your thinking instead of replacing it — and gives your agent the same techniques through a protocol it can actually run.
The two doors
For humans — contextoverflow.org. A curated, categorized corpus of thinking techniques. No login, no feed. You arrive with a problem — the site opens with "What's going wrong?" — find the technique that fits, and learn to build it into a prompt yourself: worked, annotated examples, never copy-paste snippets. The research reference for what this counters: contextoverflow.org/cognitive-debt.
For agents — MCP at contextoverflow.org/mcp. The same corpus served over Streamable HTTP; free, keyless, stateless. Listed in the official MCP Registry as org.contextoverflow/library. Five tools:
| Tool | What it does |
|---|---|
list_categories | The major problem categories, as a human would say them |
classify_intent | Symptom description → matching techniques; genuinely ambiguous → one clarifying question, never a guess |
find_technique | Direct lookup by name |
get_technique | Mechanism, agent instructions, verification, failure modes |
apply_technique | The runnable scaffold + narration line + the check that proves it worked |
Every response carries a narration line, so the agent's technique use surfaces in-conversation in the same vocabulary its human learned on the site. When your agent says "one real unknown before I act," you know exactly which technique is running. Both sides of the pair get smarter; neither goes opaque. Setup for every client: contextoverflow.org/connect.
The major problem categories we've found so far
lost-the-thread · doing-my-thinking · confidently-wrong · agrees-with-everything · stalls-instead-of-acting · bloated-answers · starting-blind · problem-too-big · faster-than-i-can-review · did-more-than-i-asked · dumber-after-the-update
Each named for the problem as you experience it — "My AI forgets everything between sessions," "It tells me I'm right even when I'm not." Every technique lives in exactly one, and answers it.
What makes an entry
Entries are grounded in real production use (generalized field notes) or published research (verified citations only — an unverifiable attribution doesn't ship). Every entry states its mechanism, its verification check, and its failure modes — if we can't tell you how to know it worked, it doesn't ship. The full contract: corpus/SCHEMA.md.
Repository layout
corpus/— the techniques. The repo is the database; site and MCP are two views of it.site/— the human door: Jekyll, generated from the corpus at build time.mcp/— the agent door: a stateless TypeScript Cloudflare Worker, corpus compiled in, no LLM inside.validator/— the gate both doors build behind: schema, section order, edge integrity, and a build-failing privacy blocklist.
Contributing
See CONTRIBUTING.md. Short version: the front door is the suggestion box — propose techniques, vote on what gets built next; issues are open for evidence-based disagreement. Corpus and code PRs aren't accepted right now; every entry that ships passes the validator and carries real evidence.
License
corpus/— CC BY-NC-ND 4.0- everything else — Elastic License 2.0
Why these licenses. Context Overflow is free to read, learn from, and use — by people and by their AI. AI crawlers are welcome, and the corpus is served live to agents over MCP, because a shared vocabulary between a human and their assistant is the entire point. What the licenses reserve is commercial repackaging: the corpus may not be rebundled or sold as a competing product (NC-ND), and the code may not be offered as a hosted service (Elastic 2.0). Learn it, teach it to your agent, build it into your prompts — just don't repackage it.
Tools it offers (5)
What this server listed when Ahel dialed its public endpoint in Oct 2026, with no key and no account of yours. The names are the server’s own.
list_categoriesclassify_intentfind_techniqueget_techniqueapply_technique
Signals
- Last commit
- Aug 2026
Advanced
- Delivery
- library MCP server → your Ahel connector (mcp.ahel.ai) → your AI.
- Item type
- mcp-server
- Key
org-contextoverflow-library- Source
- github.com/onnson/context-overflow
- Hosted endpoint
https://contextoverflow.org/mcp
github.com/onnson/context-overflow