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hopi

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mcp.hopi.co.uk

Free UK calculators, converters and validators (tax, VAT, stamp duty, dates, units), read-only.

https://mcp.hopi.co.uk/mcpWebsiteNo authMCP 2025-11-25v1.1.0last checked 21 Oct 2026spoke MCP on 100% of 85 checks (30 days)initialize in 200 ms

Last checked 21 Oct 2026

✓Answered the MCP handshake (MCP 2025-11-25)
✓Auth detected: No auth
✓Lists 206 tools
✓No blockers or warnings
✓Spoke MCP on 85 of 85 checks (30 days)

Will my client connect?

Decided from what the probe found at the endpoint, and from what each client's own documentation says it can complete. Every row carries the day that documentation was read.

✓Claude CodeConnects

The endpoint answers an anonymous handshake, so no credential is needed.

claude mcp add --transport http hopi https://mcp.hopi.co.uk/mcp

Claude Code docs · read on 2026-08-30

✓Claude (claude.ai & Desktop)Connects

The endpoint answers an anonymous handshake, so no credential is needed.

Settings → Connectors → Add custom connector, then paste https://mcp.hopi.co.uk/mcp.

Claude (claude.ai & Desktop) docs · read on 2026-08-30

✓ChatGPTConnects

The endpoint answers an anonymous handshake, so no credential is needed.

Settings → Apps → Advanced settings → Developer mode, then create a connector pointing at https://mcp.hopi.co.uk/mcp.

ChatGPT docs · read on 2026-08-30

✓CursorConnects

The endpoint answers an anonymous handshake, so no credential is needed.

{
  "mcpServers": {
    "hopi": {
      "url": "https://mcp.hopi.co.uk/mcp"
    }
  }
}

Cursor docs · read on 2026-08-30

✓VS Code (Copilot)Connects

The endpoint answers an anonymous handshake, so no credential is needed.

{
  "servers": {
    "hopi": {
      "type": "http",
      "url": "https://mcp.hopi.co.uk/mcp"
    }
  }
}

VS Code (Copilot) docs · read on 2026-08-30

How to authenticate

Checked against the endpoint by our probe on 21 Oct 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	No auth
Protected-resource metadata	✕Not found Without it a client has to guess where the authorization server lives.
Anonymous access	Handshake succeeds; 206 tools listable

Tools

hopi_add_working_dayshopi_age_calculatorhopi_alcohol_unit_calculatorhopi_alphabetical_orderhopi_angle_converterhopi_area_converterhopi_aspect_ratio_calculatorhopi_average_calculatorhopi_base32_encoderhopi_base64hopi_bill_splitterhopi_bingo_card_generatorhopi_bitcoin_address_validatorhopi_bmi_calculatorhopi_body_fat_calculatorhopi_caesar_cipherhopi_cagr_calculatorhopi_calories_to_kjhopi_case_converterhopi_cat_age_calculatorhopi_celsius_to_fahrenheithopi_character_counterhopi_cipher_identifierhopi_cm_to_feethopi_cmyk_to_rgbhopi_coin_fliphopi_colour_name_finderhopi_colour_palette_generatorhopi_colour_pickerhopi_colour_shades_generatorhopi_combination_generatorhopi_compound_interest_calculatorhopi_contrast_checkerhopi_cron_expression_parserhopi_crypto_profit_calculatorhopi_css_gradient_generatorhopi_css_minifierhopi_csv_to_jsonhopi_cups_to_gramshopi_currency_converterhopi_data_size_converterhopi_date_calculatorhopi_day_of_week_calculatorhopi_day_rate_calculatorhopi_days_between_dateshopi_days_until_christmashopi_dca_calculatorhopi_dice_rollerhopi_diff_checkerhopi_discount_calculatorhopi_dog_age_calculatorhopi_download_time_calculatorhopi_due_date_calculatorhopi_dummy_data_generatorhopi_email_header_analyserhopi_email_link_generatorhopi_emoji_removerhopi_energy_cost_calculatorhopi_env_to_jsonhopi_eth_address_checksumhopi_eth_unit_converterhopi_euromillions_generatorhopi_event_wine_calculatorhopi_fortune_cookiehopi_fraction_calculatorhopi_fraction_to_decimalhopi_fuel_cost_calculatorhopi_hash_generatorhopi_hash_identifierhopi_heart_rate_zoneshopi_hex_to_rgbhopi_hidden_character_checkerhopi_holiday_entitlement_calculatorhopi_hourly_to_salaryhopi_hours_calculatorhopi_hsl_converterhopi_html_escapehopi_http_status_codeshopi_iban_validatorhopi_ics_generatorhopi_inflation_calculatorhopi_json_formatterhopi_json_to_csvhopi_json_to_typescripthopi_json_yaml_converterhopi_jwt_decoderhopi_kg_to_lbshopi_kg_to_stonehopi_lbs_to_kghopi_leak_tracerhopi_leap_year_checkerhopi_length_converterhopi_link_cleanerhopi_litres_to_pintshopi_loan_calculatorhopi_lookalike_domain_generatorhopi_lorem_ipsum_generatorhopi_lottery_number_generatorhopi_magic_8_ballhopi_margin_calculatorhopi_markdown_previewerhopi_market_cap_calculatorhopi_meta_tag_generatorhopi_miles_to_kmhopi_military_time_converterhopi_minutes_to_hourshopi_moon_phase_calculatorhopi_morse_code_translatorhopi_mortgage_calculatorhopi_mortgage_overpayment_calculatorhopi_mpg_converterhopi_national_insurance_calculatorhopi_nato_phonetic_alphabethopi_net_to_grosshopi_new_year_countdownhopi_number_base_converterhopi_number_to_wordshopi_oven_temperature_converterhopi_overtime_pay_calculatorhopi_password_strength_checkerhopi_percentage_calculatorhopi_percentage_change_calculatorhopi_percentage_decrease_calculatorhopi_percentage_difference_calculatorhopi_percentage_increase_calculatorhopi_position_size_calculatorhopi_power_converterhopi_pressure_converterhopi_prime_factorisation_calculatorhopi_pro_rata_salary_calculatorhopi_product_feed_generatorhopi_random_colour_generatorhopi_random_coordinateshopi_random_letter_generatorhopi_random_number_generatorhopi_random_team_generatorhopi_random_word_generatorhopi_ratio_calculatorhopi_reading_time_calculatorhopi_redundancy_pay_calculatorhopi_remove_duplicate_lineshopi_remove_extra_spaceshopi_remove_line_breakshopi_reverse_texthopi_rgb_to_hexhopi_ring_size_converterhopi_robots_txt_generatorhopi_roman_numerals_converterhopi_rounding_calculatorhopi_running_pace_calculatorhopi_satoshi_converterhopi_savings_goal_calculatorhopi_schema_markup_generatorhopi_scientific_calculatorhopi_secret_santa_generatorhopi_set_for_life_generatorhopi_shoe_size_converterhopi_sleep_calculatorhopi_slot_machine_pickerhopi_slug_generatorhopi_small_text_generatorhopi_special_charactershopi_speed_converterhopi_spin_the_bottlehopi_sql_formatterhopi_staking_calculatorhopi_stamp_duty_calculatorhopi_standard_deviation_calculatorhopi_star_sign_calculatorhopi_stone_to_kghopi_student_loan_calculatorhopi_take_home_pay_calculatorhopi_tarot_readerhopi_tdee_calculatorhopi_test_card_number_generatorhopi_text_repeaterhopi_text_splitterhopi_thunderball_generatorhopi_time_calculatorhopi_time_zone_converterhopi_tip_calculatorhopi_triangle_calculatorhopi_ucas_points_calculatorhopi_unicode_inspectorhopi_unit_price_calculatorhopi_unix_timestamp_converterhopi_upside_down_texthopi_url_encoderhopi_url_parserhopi_user_agent_parserhopi_username_generatorhopi_utm_link_generatorhopi_uuid_generatorhopi_vat_calculatorhopi_vigenere_cipherhopi_volume_converterhopi_water_intake_calculatorhopi_week_numberhopi_weight_converterhopi_wheel_spinnerhopi_word_counterhopi_word_frequency_counterhopi_working_days_calculatorhopi_would_you_rather_generatorhopi_yes_no_wheelhopi_zero_width_text_hider

Contract history

11 Oct 2026v1.1.05 compatible

11 Oct 2026v1.1.06 compatible

20 Sep 2026v1.1.0first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

[![MCP status](https://mcpi.app/servers/hopi/badge.svg)](https://mcpi.app/servers/hopi)