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unbrowse

mcp
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SUMMARY

Unbrowse — api native browser Skill/CLI/MCP/SDK for any agent. Auto-discovers APIs from browser traffic, generates skills on the fly to call APIs directly 100x faster, 80% cheaper locally.

README.md

Unbrowse

Call websites as APIs. This is the open-source client for the hosted Unbrowse service
(https://unbrowse.ai): the @unbrowse/sdk TypeScript client for its REST API, and the
unbrowse CLI built on it.

Install the agent skill:

npx skills add unbrowse-ai/unbrowse-skill --skill unbrowse

Connect your agent:

claude mcp add --transport http unbrowse https://unbrowse.ai/mcp

Complete OAuth sign-in in your client. For the CLI or SDK, use the pinned hosted-client release in the installation guide; npm latest may still target the older service.

Install · CLI · MCP · SDK · Troubleshooting

How it works

  1. Discover. Unbrowse searches your private capabilities, then a public registry of sites
    already compiled into tools.
  2. Run. A matching capability replays the site's own first-party HTTP requests. No browser.
    A run succeeds only when its result is verified.
  3. Learn once. No match: an agent does the task in Unbrowse's recorded cloud browser (MCP), or
    you upload two HAR recordings (unbrowse learn). Unbrowse compiles the requests into a
    one-call capability. Next time is step 2.

Passwords stay in the Unbrowse password manager; the CLI never takes one.

More: docs/how-it-works.md · Paper: Internal APIs Are All You Need (arXiv:2604.00694)

Commands

unbrowse login [--key ub_live_…]    sign in (browser OAuth) or store an API key
unbrowse discover <query>           your capabilities, then the public registry
unbrowse run <task…> [--set k=v]    run a task; waits for a verified result
unbrowse resume <runId> k=v…        answer what the run asked for, on the same run
unbrowse learn a.har b.har          compile two recordings into a capability
unbrowse logins                     saved logins, masked
unbrowse registry [query]           public compiled sites (no account)

All commands: docs/cli.md. Exit codes: 0 ok, 1 error, 2 input required,
3 sign-in or login needed, 4 not verified.

SDK

import { Unbrowse } from "@unbrowse/sdk";
const ub = new Unbrowse(); // UNBROWSE_API_KEY
const run = await ub.wait((await ub.run({ task: "top stories on Hacker News", idempotencyKey: crypto.randomUUID() })).runId);

Supported REST methods: docs/sdk.md.

Agents

Agents connect to the hosted MCP (https://unbrowse.ai/mcp, see docs/install.md)
and follow skill/SKILL.md. The CLI is the REST alternative. unbrowse mcp runs a local
stdio proxy to the hosted MCP for hosts that need stdio or plain tool names (unbrowse_scrape).

Plugins for Claude Code, Codex, Grok Build, OpenClaw, Hermes and elizaOS bundle the skill and make
Unbrowse the host's browser: plugins/. Grok, ChatGPT, Claude, Perplexity, Le Chat and
Gemini CLI connect as a custom connector: docs/connect.md.

Pricing

Check your current account plan and unbrowse usage for quota and pricing.
docs/pricing.md

Develop

bun install
bun test packages     # SDK route tests + CLI tests against a local stand-in API
bun run typecheck
bun run build         # packages/sdk/dist, packages/cli/dist/cli.js (Node 18.17+)
bun run cli help

Release

CI/CD publishes on a version tag: docs/release.md.

What is here and what stays hosted: docs/open-source.md. MIT © Unbrowse AI

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