About Free Agent Tools
Free Agent Tools is a free, no-auth remote MCP server with deterministic tools for business checks and Japan travel, residency, tax, and daily-life questions. It suits agents that need structured estimates and rule-of-thumb checks; results include disclaimers and are not professional advice.
Key features
- 01Business idea and pricing checks
- 02Advertising and App Store prechecks
- 03Japan travel and customs tools
- 04Visa, residency, and work eligibility checks
- 05Tax, medical-cost, and disaster-prep tools
- 06Read-only tools and JSON APIs
Use cases
- 01Assess a startup pitch or business idea
- 02Plan Japan travel and check travel rules
- 03Check visa, residence, or part-time work conditions
- 04Estimate Japan tax or medical-cost obligations
MCP support
The project exposes its tools through a no-auth remote MCP server using streamable HTTP at https://free-agent-tools.vercel.app/mcp. Each tool is also available as a JSON API.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
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"}}}Open in Cursor{"servers":{"akiba-labs-free-agent-tools":{"type":"http","url":"https://free-agent-tools.vercel.app/mcp"}}}Open in VS Code{"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"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
24| Parameter | Type | Required | Description |
|---|---|---|---|
| tam | number | Yes | Market size and proof that people buy, 1-10. |
| pain | boolean | No | Fixes a measurable pain? Default true. |
| money | boolean | No | Buyers have money to spend? Default true. |
| margin | number | Yes | Net margin potential, 1-10. |
| suffer | boolean | No | Founder willing to push through a long build? Default true. |
| advantage | number | Yes | Hard-to-copy edge (distribution, data, expertise), 1-10. |
| operations | number | Yes | How easily it runs without the founder, 1-10. |
Details
From the project 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
Comments
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