OpencoderBLOCK
The Claude Code alternative
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
Try it out:
npx opencoder@latest
bunx opencoder@latest
Or try the beta channel:
npx opencoder@next
Overview
- Complete Claude Code replacement with similar UI and UX
- Built on top of the Vercel AI SDK. Fully compatible with the AI SDK model.
- Supports any LLM providers that the AI SDK supports (OpenAI, Anthropic, Google, etc.)
- Cross-platform shell: which means supports Windows, Linux, and MacOS.
- High performance: 60 FPS UI rendering, powered by React concurrent rendering, React Compiler
- Add custom tools to OpenCoder in 1 step (with custom UI)
Demo
Youtube clone
https://github.com/user-attachments/assets/67c52f00-7c54-404d-b1e2-244312f0094a
Features
1. Built on top of the Vercel AI SDK
OpenCoder is built on top of the Vercel AI SDK. It is fully compatible with the AI SDK model, any official or community model supported by the AI SDK will work with OpenCoder:
import { ollama } from 'ollama-ai-provider'; // read more: https://sdk.vercel.ai/providers/community-providers/ollama
import type { Config } from 'opencoder';
export default {
model: ollama('qwq'),
} satisfies Config2. MCP makes it easy
Integrate powerful MCP capabilities into your workflow in 1 step. OpenCoder provides ready-to-use MCP tools that can be implemented with just a few lines of code:
import { playwright } from 'opencoder/mcp';
export default {
mcp: [playwright()],
} satisfies ConfigMore examples:
- Create MCP tools
- Playwright example
3. Cross-platform shell
OpenCoder has a cross-platform shell that supports Windows, Linux, and MacOS. Powered by Deno shell
Available tools
- Read file
- Write file
- Edit file
- Think
- Memory edit
- Memory read
- Planning
- Grep: powered by @vscode/ripgrep
- Check diagnostics (currently onl
6c49092f6918OBSERVED · 2026-10-01Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.
claude mcp add opencoder -- npx -y [email protected]
{
"mcpServers": {
"opencoder": {
"command": "npx",
"args": [
"-y",
"[email protected]"
]
}
}
}Exposed tools (2)
0 read · 1 write · 1 destructive. Blast radius: 1 tool can delete or overwrite — an agent that can be talked into calling a tool can be talked into calling this one.
| Tool | Risk | Description |
|---|---|---|
clear | destructive | Clear chat history |
sync | write | Sync codebase to the codebase index, stored in .coder/embeddings |
Trust audit
BLOCKgrade D · trust 69/100 Do not install this without reading the findings. The audit found something that could harm you or your machine.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | WARN |
| L1 | Static analysis of the code | FAIL |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | WARN |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- declared (2 observation(s))
- Network
- declared (5 observation(s))
- Shell
- declared (3 observation(s))
- Dependencies
- not all pinned
- Secrets in source
- none-found
Findings (12)
ASM_CONSTS[start] = eval(func)
moduleExports[name] = eval(func)
yoga.wasm
clear
.augment-guidelines
.oxlintrc.json
import pkg from "../../package.json" with { type: "json" }import type { AppContextType } from "../../src/app/context.js"import type { AppContextType } from "../../src/app/context.js"import { autoAcceptToolsAtom } from "../../src/lib/store/tool-confirmation.js"import { env } from "../../src/lib/env.js"@ai-sdk/anthropic, @ai-sdk/google, @ai-sdk/openai, @ai-sdk/openai-compatible, @lancedb/lancedb, linkedom, ai, cli-boxes
Gates applied: no_behavioural_pass.
6c49092f6918full audit observations/trust-audit/mcp-server/ducan-ne__opencoder.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-01 | 6c49092f6918 | BLOCK | D | 69 | first audit |
Questions
What is the Opencoder MCP server?
The Claude Code alternative
What tools does Opencoder expose?
2 in total: 0 read-only, 1 that write, and 1 that can delete or overwrite (clear). Every one is listed on this page with its risk.
Is Opencoder safe to connect to an agent?
No — not without reading the findings first. The audit graded it D (69/100) and found 2 critical or high issues in the source. Each one is listed on this page with the file and line it is on. Separately from the audit: 1 of its tools can destroy data, so scope the token you give it to what you actually need.
What credentials does Opencoder need?
No credential environment variables were found in its source, so it appears to need none.
How current is this page?
The grade is for one exact copy of the source (6c49092f6918), read on 2026-10-01. The repository is watched and re-audited when it changes.