Supergateway is a command-line gateway that connects MCP servers using different transports, such as standard input and output, Server-Sent Events, WebSockets, and Streamable HTTP. It is for exposing local MCP servers remotely, connecting clients with incompatible transport support, and debugging MCP connections.
Borrowing it
Nothing to install: this file belongs to supercorp-ai/supergateway. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/supercorp-ai/supergateway/main/AGENTS.mdgit clone --depth 1 https://github.com/supercorp-ai/supergatewayWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/supercorp-ai/supergateway/agents-md)<a href="https://agentmods.dev/instructions/supercorp-ai/supergateway/agents-md"><img src="https://agentmods.dev/badge/instructions/supercorp-ai/supergateway/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/supercorp-ai/supergateway/agents-md"><img src="https://agentmods.dev/badge/instructions/supercorp-ai/supergateway/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00144 | $0.00144 |
| Opus 5.5 | $0.00058 | $0.00058 |
| Sonnet 5.5 | $0.00029 | $0.00029 |
| Haiku 4.5 | $0.00014 | $0.00014 |
Grade A, and why
supergateway AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Setup
Install Node.js v24 using nvm. After checking out the repository, run:
nvm install 24
nvm use 24
npm install
# Build
Compile the TypeScript sources before running tests:
npm run build
Running tests
Run the test suite with Node's test runner and ts-node to enable mocks:
npm run test
The tests/helpers/mock-mcp-server.js script provides a lightweight local MCP
server used during tests so everything runs offline. All tests should pass
without external downloads.
If network-dependent commands (like npx -y @modelcontextprotocol/server-*) fail, check network access.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 30 lines · 144 tokens per session scan A 781a5a5e743d
supergateway AGENTS.md is an instructions file published in the GitHub repository supercorp-ai/supergateway (2,948 stars, last pushed 11d ago), licensed MIT. It adds 144 tokens to every session, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
supergateway AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| supergateway AGENTS.mdsupercorp-ai/supergateway | Instructions file | 2.9k | 11d ago | MIT | A | 144 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |