关于 Free Agent Tools
Free Agent Tools 是免费的免认证远程 MCP 服务，提供确定性工具，用于商业检查以及日本旅行、居留、税务和日常生活问题。它适合需要结构化估算和规则参考检查的 Agent；结果附有免责声明，并非专业建议。
主要功能
- 01商业创意与定价检查
- 02广告及 App Store 预检
- 03日本旅行与海关工具
- 04签证、居留及工作资格检查
- 05税务、医疗费用与防灾工具
- 06只读工具和 JSON API
适用场景
- 01评估创业方案或商业创意
- 02规划日本旅行并查询相关规则
- 03检查签证、居留或兼职条件
- 04估算日本税务或医疗费用
MCP 相关
该项目通过 https://free-agent-tools.vercel.app/mcp 上的免认证远程 MCP 服务，以可流式传输的 HTTP 暴露工具。每项工具也可作为 JSON API 使用。
配置
远程服务无需本地安装。选择你使用的客户端，复制配置或使用一键安装。
https://free-agent-tools.vercel.app/mcpclaude mcp add --transport http akiba-labs-free-agent-tools https://free-agent-tools.vercel.app/mcp{"mcpServers":{"akiba-labs-free-agent-tools":{"type":"http","url":"https://free-agent-tools.vercel.app/mcp"}}}在 Cursor 中打开{"servers":{"akiba-labs-free-agent-tools":{"type":"http","url":"https://free-agent-tools.vercel.app/mcp"}}}在 VS Code 中打开{"mcpServers":{"akiba-labs-free-agent-tools":{"type":"http","url":"https://free-agent-tools.vercel.app/mcp"}}}{"mcpServers":{"akiba-labs-free-agent-tools":{"serverUrl":"https://free-agent-tools.vercel.app/mcp"}}}命令在终端中运行；JSON 粘贴到对应客户端的 MCP 配置后重启。需要授权的服务会在首次连接时提示登录。
工具
24| 参数 | 类型 | 必填 | 说明 |
|---|---|---|---|
| tam | number | 是 | 市场规模及消费者购买的证据，1–10 分。 |
| pain | boolean | 否 | 是否解决了可衡量的痛点？默认值为 true。 |
| money | boolean | 否 | 买家是否有可支配资金？默认值为 true。 |
| margin | number | 是 | 净利润率潜力，1–10 分。 |
| suffer | boolean | 否 | 创始人是否愿意坚持完成长期建设？默认值为 true。 |
| advantage | number | 是 | 难以复制的优势（分销、数据、专业知识），1–10 分。 |
| operations | number | 是 | 无需创始人参与即可运行的容易程度，1–10 分。 |
详细介绍
来自项目 READMEFree Agent Tools: free remote MCP server
A free, no-auth remote MCP server (streamable HTTP) with 39 small, deterministic tools your AI agent can call: startup pitch roasting, business idea scoring, price headroom, hotel OTA commission, open-source swaps for SaaS bills, Google Ads / Meta Ads notice risk, App Store 4.2 / 4.3 precheck, faceless YouTube reality check, AI infrastructure bottlenecks, viral attention patterns, Japan trip planning, Japan tax-free refund checking, Japan visa / residence permit fees, Japan luggage rules / forwarding cost, the Kyushu travel discount (九州ふっこう応援割), the Japan customs duty-free allowance on arrival, Japan pre-entry TB screening (JPETS), Japan dual pricing (resident vs non-resident prices), a Japan emergency alert decoder (緊急地震速報, tsunami, the level-named warnings since 2026-05-29, 避難指示, J-ALERT), a Japan permanent residence (永住) guideline check for the 2026-10-01 revision, a Japan international postage calculator (Japan Post prices now vs from 2027-02-01), a Japan re-entry deadline check (みなし再入国 / re-entry permit / pending renewal), and a Japan overseas dependents check (国外居住親族: age bands, ¥380,000 remittance rule, 2026 income limit), a Japan part-time work check (資格外活動許可: which statuses may take which jobs, 28-hour rule with rolling 7-day windows, the 2026-10-01 pachinko change for dependents), a Japan driving check (Geneva IDP vs translation vs no route by country, 1-year and 3-month rules, 外免切替 after 2025-10-01), an Airbnb house rules check (likely-not-allowed rules and checkout tasks for bookings from 2026-11-20, rewrites, Japan 民泊 guest-register exceptions), a Japan My Number Card expiry check (foreign residents' card ends with the period of stay: city-hall deadline, 2-month extension while a renewal is pending, 10th-birthday cap; e-certificate and マイナ保険証 grace), a Japan Highly Skilled Professional points calculator (高度人材ポイント: 70 vs 80 for the PR fast track, ¥3M floor, no-double-count rules, J-Skip), and a Japan pet quarantine check (dogs, cats, rabbits: 180-day wait, 40-day notice, detention days, the 2027-01-01 mandatory 14-day export application), and a Japan leaving-tax check (resident tax still owed under the January 1 rule, tax agent / 納税管理人, final-salary lump sum, 準確定申告 and 転出届 deadlines), and a Japan disaster prep check (the 防災庁 2026-11-02 emergency request as a household checklist: water, food and portable-toilet stockpile, 旧耐震 check, 5-point to-do).
Endpoint: https://free-agent-tools.vercel.app/mcp
Landing page with setup for every client: https://free-agent-tools.vercel.app
No API key, no account, nothing to install. Results are rules of thumb and educational estimates, not financial, legal, or investment advice, and every result carries a disclaimer for the user.
Add it
Claude Code
claude mcp add --transport http free-agent-tools https://free-agent-tools.vercel.app/mcp
Claude (desktop / web): Settings → Connectors → Add custom connector → paste the URL.
ChatGPT: Settings → Apps & Connectors → Advanced → Developer mode → Create → paste the URL, no authentication.
Cursor (~/.cursor/mcp.json)
{ "mcpServers": { "free-agent-tools": { "url": "https://free-agent-tools.vercel.app/mcp" } } }
VS Code (.vscode/mcp.json)
{ "servers": { "free-agent-tools": { "type": "http", "url": "https://free-agent-tools.vercel.app/mcp" } } }
Windsurf (~/.codeium/windsurf/mcp_config.json)
{ "mcpServers": { "free-agent-tools": { "serverUrl": "https://free-agent-tools.vercel.app/mcp" } } }
Stdio-only clients
{ "mcpServers": { "free-agent-tools": { "command": "npx", "args": ["-y", "mcp-remote", "https://free-agent-tools.vercel.app/mcp"] } } }
Tools
| Tool | What it does |
|---|---|
roast_pitch | Roast a startup pitch (five judges, one verdict, one change) |
score_business_idea_moat | Score a business idea (MOAT: fund, fix, or flee) |
price_headroom_check | Price headroom from close rate |
thirty_day_cash_check | Do customers fund growth? (30-day cash) |
email_list_reactivation_value | What is an old email list worth? |
hotel_ota_commission_calculator | Hotel OTA commission and direct-booking savings |
saas_self_host_savings | Replace paid SaaS with open source: savings and payback |
list_open_source_saas_alternatives | List open-source alternatives to paid SaaS |
ads_policy_notice_risk_check | Google Ads / Meta Ads notice risk card |
app_store_wrapper_precheck | App Store 4.2 / 4.3 / metadata rejection precheck |
faceless_youtube_reality_check | Faceless / AI YouTube channel reality check |
ai_infrastructure_bottlenecks | AI infrastructure bottlenecks explained |
ai_bottleneck_quiz | Which AI bottleneck constrains your stack? (quiz) |
viral_attention_patterns | How attention spreads online |
viral_attention_quiz | Do you chase, invent, or read attention? (quiz) |
japan_trip_plan | Japan trip plan by city and month |
japan_trip_options | Japan Trip Brain: supported cities, months, travelers |
japan_tax_free_refund_check | Japan tax-free shopping refund check (from 2026-11-01) |
japan_visa_fee_check | Japan visa / residence permit fee (from 2026-10-01) |
japan_luggage_check | Japan suitcase check: Shinkansen oversized-baggage rule + Yamato forwarding cost |
kyushu_travel_discount_check | Kyushu travel discount (九州ふっこう応援割 2026): savings + date/channel eligibility |
japan_customs_allowance_check | Japan customs duty-free allowance on arrival: within/over, duty estimate in yen, cash declaration |
japan_tb_screening_check | Japan pre-entry TB screening (JPETS): TB Clearance Certificate needed? Indonesia from 2027-01-04, exemptions, Panel Clinics |
japan_dual_pricing_check | Japan dual pricing (二重価格): resident vs non-resident prices at Himeji Castle, Nijo Castle (FY2027), Kyoto bus, Kagoshima, Kitakyushu… Full tracker table and checker: https://japan-dual-pricing.vercel.app |
japan_emergency_alert_decode | Japanese emergency alert decoder: 緊急地震速報 EEW (and cancellations), tsunami, レベル4危険警報 and the 2026-05-29 renaming, 避難指示, Nankai Trough, J-ALERT; meaning, level, what to do, 14-language official names |
japan_permanent_residency_check | Japan permanent residence (永住) guideline revised 2026-10-01: which version applies by filing date, spouse 3+1 → 5+3 years from 2027-04-01, 3-year visa transition, 6-month / 2.5-year absence rule, B1 |
japan_international_postage_check | Japan Post international mail prices now vs from 2027-02-01: EMS (1 kg bands), air / surface parcels, small packets, International Air Packet, letters, postcards; any country, cheapest option |
japan_reentry_deadline_check | When must a foreign resident be back in Japan: deemed re-entry (1 year or card expiry, SPR 2 years, not extendable abroad), regular re-entry permit, 2-month special period while a renewal is pending |
japan_overseas_dependents_check | Claiming a relative living outside Japan as a dependent (国外居住親族): age 16-29 / 30-69 / 70+ rules, ¥380,000 remittance test, 2026 ¥620,000 income limit, deduction amount, tax saving, proof documents |
japan_parttime_work_check | Can a foreign resident do this part-time job / side gig on their Japanese status (資格外活動許可): comprehensive 28-hour vs individual permission, rolling 7-day hours, students' 8 h/day vacation rule, banned 風俗営業 venues, 2026-10-01 pachinko/game-center change for Dependent holders |
japan_driving_check | Can you drive in Japan on a foreign license: Geneva IDP vs Japanese translation vs no route by country (NPA list, May 2026), last driving day (1 year from landing, IDP validity, 3-month rule), 外免切替 eligibility, test exemptions (incl. US states), documents, fees |
airbnb_house_rules_check | Which Airbnb house rules / checkout tasks are likely not allowed for reservations booked from 2026-11-20 (dishes, stripping beds, trash off-site, fines, fees, amenity limits, contracts, ID, off-platform, rules after booking), EN/JA rewrites, standard rules to set, Japan guest-register (宿泊者名簿・旅券の写し) exception |
japan_my_number_card_expiry_check | When a Japan My Number Card (マイナンバーカード) expires and what to do: foreign residents' card ends with the period of stay and is not extended by a visa renewal (city-hall deadline, one-time 2-month extension while pending, 10th-birthday cap, 特定在留カード), Japanese / PR / SPR 10th / 5th birthday and renewal window, e-certificate expiry, マイナ保険証 grace |
japan_hsp_points_check | Japan Highly Skilled Professional (高度専門職 1号イ/ロ/ハ) points from the ordinance and ISA table: age / salary-by-age / education / experience / research / qualifications / position plus bonuses with no-double-count rules, ¥3M floor, 70 vs 80 (PR after 3 years vs 1 year), HSP ii, J-Skip, what could add points |
japan_pet_quarantine_check | Japan pet import / export / round-trip dates for dogs, cats and rabbits from MAFF AQS rules: microchip → 2 rabies shots → antibody test → 180-day wait, designated regions, 40-day notice, vet check within 10 days, detention days if early, short-stay return, 14-day export application mandatory for dogs and rabbits from 2027-01-01 |
japan_leaving_tax_check | Leaving Japan: which 住民税 fiscal years are still owed (January 1 assessment date; leave by December 31 to skip next year), tax agent (納税管理人) needed?, final-salary lump sum (mandatory for jobs ending Jan 1 – Apr 30), year-end adjustment / 準確定申告 deadline, previous-year return, exit-tax flag, 転出届 window, pension lump-sum claim deadline. No yen amounts |
japan_disaster_prep_check | Japan's 防災庁 emergency request (事前防災徹底のための緊急要請, 2026-11-02) as a household checklist: drinking water 3 L, 3 meals and 5 portable-toilet uses per person per day for 3 days or a week, gap against what you have, pets 5–7+ days, old quake standard (旧耐震, 建築確認 before 1981-06-01) and pre-2000 wooden-house check, status of the 5 points |
japan_lost_item_check | Lost something in Japan (wallet, phone, passport, residence card, bag, umbrella; train, subway, Shinkansen, taxi, airport, shop, street): steps in order, operator lost-and-found contact, police search by prefecture, 遺失物法 periods (3-month hold, 2-week umbrellas / clothing, facility hand-over 1 / 2 weeks, ¥100,000 high-value line), 5–20% reward, residence card 14-day reissue deadline |
japan_high_cost_medical_check | Japan 高額療養費: monthly cap for your age and income band, what you really pay, refund, 4th-month 多数回 rate, the new Aug–Jul yearly cap (from Aug 2026), the same bill under the Aug 2027 12-band schedule, 2-year claim deadline; optional months tracker |
All tools are read-only and idempotent.
Plain HTTP APIs
Every tool is also a free JSON API (GET or POST, CORS open, OpenAPI 3.1, /.well-known/ai-plugin.json, llms.txt):
- Japan Job Loss Check
- Japan Visa Renewal Window Check
- Japan JLPT Level Check
- Japan Graduate Visa Check
Japan rules index (machine-readable)
One file with the thresholds, fees, effective dates and official sources behind every Japan rule tool: /rules.json (human-readable: /rules.md). It is copied from each tool's own /api/rules, which stays the live source of truth; rebuild with python3 scripts/build-rules-index.py. Educational summaries, not legal, tax or immigration advice.
Test it
npx @modelcontextprotocol/inspector --cli https://free-agent-tools.vercel.app/mcp --transport http --method tools/list
Develop
npm install
npm run dev # http://localhost:3000/mcp
npm test # schema and wiring tests
npm run e2e # real MCP client: list tools and call every tool (defaults to production)
Built with Next.js and mcp-handler (MCP SDK v2; serves the
2026-07-28 spec natively with stateless fallback for 2025-era Streamable HTTP clients). Deployed on Vercel.
License
MIT
评论
一个开放协议，规定了 AI 应用如何以统一方式连接外部工具与数据源。客户端负责与模型对话，MCP 服务负责提供工具、资源和提示模板，两者通过标准消息通信，同一个服务可以被不同客户端复用。