# fastcontext-mcp

> Use this tool when you need to efficiently navigate large codebases and reduce token consumption. Fastcontext-mcp solves the problem of cumbersome code exploration by returning precise file paths and line ranges as grounded citations. It is ideal for use cases where token optimization is crucial, such as in resource-constrained environments or large-scale code analysis projects.

Canonical page: https://skillsregistry.net/skills/jmacd867-fastcontext-mcp  
JSON: https://api.skillsregistry.net/v1/skills/jmacd867-fastcontext-mcp

## Description

Wraps FastContext-1.0 as a repo-exploration subagent for Claude Code, enabling efficient codebase navigation by returning file paths and line ranges as grounded citations, reducing main-agent token consumption by up to 60%.

## Trust

- **Trust score (0–1):** 0.69
- **Verification tier:** scanned
- **Last scanned:** 2026-08-31

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** file-system
- **Updated:** 2026-08-31

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/dpnyk0i193)
- **Repository:** <https://github.com/jmacd867/fastcontext-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "jmacd867-fastcontext-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/jmacd867-fastcontext-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/jmacd867-fastcontext-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt