What is alltrails-fpx?

A command-line connection to AllTrails, a website for finding and reviewing hiking trails. It can use an already signed-in browser tab to access trail and personal account data.

Use it to search trails, view details, reviews, photos, and weather, or access saved lists, completed trails, and the activity feed.

AllTrails has no public API, and its website blocks ordinary automated requests, so this approach uses the signed-in tab for each request.

alltrails-fpx — Skill for Claude Code by chrischall/alltrails-mcp

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add chrischall/alltrails-mcp --skill alltrails-fpx

Clone the repo

git clone --depth 1 https://github.com/chrischall/alltrails-mcp

Made for: Claude Code.

Or install alltrails, the plugin that ships this one along with the rest of its 2 skills, 2 MCP servers.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/chrischall/alltrails-mcp/alltrails-fpx/github.svg)](https://agentmods.dev/skills/chrischall/alltrails-mcp/alltrails-fpx)

Your own site

<a href="https://agentmods.dev/skills/chrischall/alltrails-mcp/alltrails-fpx"><img src="https://agentmods.dev/badge/skills/chrischall/alltrails-mcp/alltrails-fpx/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/chrischall/alltrails-mcp/alltrails-fpx"><img src="https://agentmods.dev/badge/skills/chrischall/alltrails-mcp/alltrails-fpx.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 99 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,573 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00099	$0.01573
Opus 5.5	$0.00040	$0.00629
Sonnet 5.5	$0.00020	$0.00315
Haiku 4.5	$0.00010	$0.00157

Measured 1mo ago against content hash c5b945b4394e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

alltrails-fpx scanned grade A with 1 finding 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 1mo 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

the HTTP client, not just the cookie — a Node/curl replay of a captured

skills/alltrails-fpx/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AllTrails via fpx (no MCP)

AllTrails has no public API; alltrails-mcp reverse-engineers the internal one alltrails.com itself uses, fronted by DataDome. DataDome fingerprints the HTTP client, not just the cookie — a Node/curl replay of a captured cookie gets 403'd even the same day an identical in-tab fetch succeeds. So every request must ride a same-origin fetch inside the user's own signed-in tab, which fpx provides (no stored-cookie mode, unlike some other fleet skills).

Every request also needs an x-at-key app header — a static, anonymous client-identifier the web app sends on every /api/alltrails/* call. It is not stored anywhere — capture it live from the tab's own traffic (below). An in-tab fetch does not add it automatically, so it (plus x-at-caller/x-language-locale) must be attached explicitly on every fpx call, same as the MCP's client.ts does.

One-time setup

npm install -g @fetchproxy/cli                  # provides `fpx`
fpx profile add alltrails --domain alltrails.com
fpx profile declare alltrails \
  --capture-header '[email protected]/api/alltrails/*'
fpx pair -p alltrails                           # prints a pair code → approve in ContextMint Bridge

Requirements: the ContextMint Bridge browser extension installed (releases — Chrome: load the chrome zip unpacked; use Chrome for now — Safari will ship inside the ContextMint app, which has no public download yet), its Chrome Site access allowing alltrails.com, and an open, signed-in www.alltrails.com tab (the per-user tools need a real session; the trail tools work signed-out too). Pairing persists after the first approval. ContextMint Bridge is the fetchproxy extension renamed, same maintainer; source and .sha256-checkable release zips at https://github.com/nullnet-app/contextmint-bridge.

Capture the app key, then attach it on every call

x-at-key is captured from the tab's own API traffic — the capture only fires while the tab makes a request. fpx session triggers the capture and returns everything declared, including capturedHeaders:

Read the full file on GitHub · 123 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

references/endpoints.md 7.5 KB

Changes

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.

1mo ago Changed · +4 lines c5b945b4394e
2mo ago Changed · +7 lines 024b182a268c
2mo ago First seen · 112 lines · 99 tokens per session scan A d9ca17ec3916

Subscribe to this mod's changes

alltrails-fpx is a skill published in the GitHub repository chrischall/alltrails-mcp (0 stars, last pushed 3d ago), licensed MIT. It adds 99 tokens to every session and 1,573 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Research

alltrails-fpx next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
alltrails-fpxchrischall/alltrails-mcp	Skill	0	3d ago	MIT	A	99	Claude Code
imagegenopenai/codex	Skill	135k	today	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	100k	today	Apache-2.0	A	19	Claude Code
browser-automationopenclaw/openclaw	Skill	394k	today	MIT	A	36	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	80k	8d ago	MIT	A	200	Claude Code, Codex
next-cache-components-adoptionvercel/next.js	Skill	144k	today	MIT	A	95	Claude Code
chat-pet-sprite-creationmicrosoft/vscode	Skill	195k	today	MIT	A	53	Claude Code, Codex

alltrails-fpx