{"id":354910,"name":"ProofPrice","description":"Prices people actually paid, from official open data: homes, rents, fuel, energy, food, medicines. This is a read-only price service reached over MCP (https://proofprice.com/api/mcp) and REST (https://proofprice.com/api/v1). It does not run A2A message exchange: use the MCP or REST endpoints, or read https://proofprice.com/llms.txt.","card_url":"https://proofprice.com/.well-known/agent-card.json","endpoint":"https://proofprice.com/api/v1","protocol_version":"0.3.0","first_seen":"2026-10-24T05:43:18.863775+00:00","last_verified":"2026-10-24T05:43:18.863775+00:00","card":{"url":"https://proofprice.com/api/v1","name":"ProofPrice","skills":[{"id":"border-prices","name":"Border prices: customs unit values per kilogram","tags":["prices","real-prices-paid","border-prices"],"inputModes":["application/json"],"description":"Border prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_border_prices; REST GET https://proofprice.com/api/v1/border-prices. Free, no key.","outputModes":["application/json"]},{"id":"broadband","name":"Mobile and broadband prices","tags":["prices","real-prices-paid","broadband"],"inputModes":["application/json"],"description":"Mobile and broadband prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_broadband_prices; REST GET https://proofprice.com/api/v1/broadband. Free, no key.","outputModes":["application/json"]},{"id":"cars","name":"Car-related prices actually paid","tags":["prices","real-prices-paid","cars"],"inputModes":["application/json"],"description":"Car prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_car_prices; REST GET https://proofprice.com/api/v1/cars. Free, no key.","outputModes":["application/json"]},{"id":"childcare","name":"Childcare prices paid","tags":["prices","real-prices-paid","childcare"],"inputModes":["application/json"],"description":"Childcare prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_childcare_prices; REST GET https://proofprice.com/api/v1/childcare. Free, no key.","outputModes":["application/json"]},{"id":"commercial-property","name":"Commercial property and land sale prices actually paid","tags":["prices","real-prices-paid","commercial-property"],"inputModes":["application/json"],"description":"Commercial property and land sales: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_commercial_property; REST GET https://proofprice.com/api/v1/commercial-property. Free, no key.","outputModes":["application/json"]},{"id":"construction","name":"Building cost per square metre","tags":["prices","real-prices-paid","construction"],"inputModes":["application/json"],"description":"Construction costs: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_construction_costs; REST GET https://proofprice.com/api/v1/construction. Free, no key.","outputModes":["application/json"]},{"id":"contracts","name":"Government contract prices (what public buyers paid)","tags":["prices","real-prices-paid","contracts"],"inputModes":["application/json"],"description":"Government contract prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_contract_prices; REST GET https://proofprice.com/api/v1/contracts. Free, no key.","outputModes":["application/json"]},{"id":"diet-costs","name":"Cost of a healthy diet per person per day","tags":["prices","real-prices-paid","diet-costs"],"inputModes":["application/json"],"description":"Healthy diet cost: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_diet_costs; REST GET https://proofprice.com/api/v1/diet-costs. Free, no key.","outputModes":["application/json"]},{"id":"energy","name":"Household electricity and gas prices","tags":["prices","real-prices-paid","energy"],"inputModes":["application/json"],"description":"Household and business energy prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_energy_prices; REST GET https://proofprice.com/api/v1/energy. Free, no key.","outputModes":["application/json"]},{"id":"farm-gate-prices","name":"Farm-gate prices received by farmers (monthly)","tags":["prices","real-prices-paid","farm-gate-prices"],"inputModes":["application/json"],"description":"Farm-gate prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_farm_gate_prices; REST GET https://proofprice.com/api/v1/farm-gate-prices. Free, no key.","outputModes":["application/json"]},{"id":"farm-prices","name":"Farm and wholesale food prices","tags":["prices","real-prices-paid","farm-prices"],"inputModes":["application/json"],"description":"Farm and wholesale food prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_farm_prices; REST GET https://proofprice.com/api/v1/farm-prices. Free, no key.","outputModes":["application/json"]},{"id":"flights","name":"Airfares paid","tags":["prices","real-prices-paid","flights"],"inputModes":["application/json"],"description":"Airfares paid: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_airfare_prices; REST GET https://proofprice.com/api/v1/airfares. Free, no key.","outputModes":["application/json"]},{"id":"fuel","name":"Live fuel prices at the pump","tags":["prices","real-prices-paid","fuel"],"inputModes":["application/json"],"description":"Live fuel prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_fuel_prices_now; REST GET https://proofprice.com/api/v1/fuel. Free, no key.","outputModes":["application/json"]},{"id":"groceries","name":"Grocery and everyday prices","tags":["prices","real-prices-paid","groceries"],"inputModes":["application/json"],"description":"Grocery prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_grocery_prices; REST GET https://proofprice.com/api/v1/groceries. Free, no key.","outputModes":["application/json"]},{"id":"health-insurance","name":"Health insurance premiums (approved tariffs)","tags":["prices","real-prices-paid","health-insurance"],"inputModes":["application/json"],"description":"Health insurance premiums: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_health_insurance_premiums; REST GET https://proofprice.com/api/v1/health-insurance. Free, no key.","outputModes":["application/json"]},{"id":"home-sales","name":"Home sale prices actually paid","tags":["prices","real-prices-paid","home-sales"],"inputModes":["application/json"],"description":"Home sales: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_home_sales; REST GET https://proofprice.com/api/v1/home-sales. Free, no key.","outputModes":["application/json"]},{"id":"home-upgrades","name":"Home upgrade costs (heat pumps, solar, insulation, windows)","tags":["prices","real-prices-paid","home-upgrades"],"inputModes":["application/json"],"description":"Home upgrade prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_home_upgrade_prices; REST GET https://proofprice.com/api/v1/home-upgrades. Free, no key.","outputModes":["application/json"]},{"id":"hotels","name":"Hotel room prices","tags":["prices","real-prices-paid","hotels"],"inputModes":["application/json"],"description":"Hotel room prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_hotel_prices; REST GET https://proofprice.com/api/v1/hotels. Free, no key.","outputModes":["application/json"]},{"id":"insurance","name":"Insurance premiums paid","tags":["prices","real-prices-paid","insurance"],"inputModes":["application/json"],"description":"Insurance premiums: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_insurance_prices; REST GET https://proofprice.com/api/v1/insurance. Free, no key.","outputModes":["application/json"]},{"id":"land-prices","name":"Farmland prices and rents","tags":["prices","real-prices-paid","land-prices"],"inputModes":["application/json"],"description":"Farmland prices and rents: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_land_prices; REST GET https://proofprice.com/api/v1/land-prices. Free, no key.","outputModes":["application/json"]},{"id":"medical","name":"Doctor and hospital prices paid","tags":["prices","real-prices-paid","medical"],"inputModes":["application/json"],"description":"Doctor and hospital prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_medical_prices; REST GET https://proofprice.com/api/v1/medical. Free, no key.","outputModes":["application/json"]},{"id":"medicines","name":"Official pharmacy prices of medicines","tags":["prices","real-prices-paid","medicines"],"inputModes":["application/json"],"description":"Medicine prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_medicine_prices; REST GET https://proofprice.com/api/v1/medicines. Free, no key.","outputModes":["application/json"]},{"id":"price-levels","name":"Price levels: how expensive a country is compared with others","tags":["prices","real-prices-paid","price-levels"],"inputModes":["application/json"],"description":"Price level: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_price_levels; REST GET https://proofprice.com/api/v1/price-levels. Free, no key.","outputModes":["application/json"]},{"id":"producer-prices","name":"Farm-gate producer prices (annual)","tags":["prices","real-prices-paid","producer-prices"],"inputModes":["application/json"],"description":"Farm-gate producer prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_producer_prices; REST GET https://proofprice.com/api/v1/producer-prices. Free, no key.","outputModes":["application/json"]},{"id":"rent","name":"Rents paid","tags":["prices","real-prices-paid","rent"],"inputModes":["application/json"],"description":"Rents paid: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_rent_prices; REST GET https://proofprice.com/api/v1/rent. Free, no key.","outputModes":["application/json"]},{"id":"surplus-auctions","name":"Public auction prices (winning bids on surplus goods)","tags":["prices","real-prices-paid","surplus-auctions"],"inputModes":["application/json"],"description":"Public auction prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_auction_prices; REST GET https://proofprice.com/api/v1/auctions. Free, no key.","outputModes":["application/json"]},{"id":"tuition","name":"University tuition fees","tags":["prices","real-prices-paid","tuition"],"inputModes":["application/json"],"description":"University tuition fees: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_tuition_fees; REST GET https://proofprice.com/api/v1/tuition. Free, no key.","outputModes":["application/json"]},{"id":"wholesale-fresh-food","name":"Wholesale prices of live animals, fish, eggs and fresh food","tags":["prices","real-prices-paid","wholesale-fresh-food"],"inputModes":["application/json"],"description":"Wholesale fresh food prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_wholesale_fresh_food_prices; REST GET https://proofprice.com/api/v1/wholesale-fresh-food. Free, no key.","outputModes":["application/json"]},{"id":"wholesale-markets","name":"Wholesale market prices for vegetables and fruit","tags":["prices","real-prices-paid","wholesale-markets"],"inputModes":["application/json"],"description":"Wholesale market prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_wholesale_market_prices; REST GET https://proofprice.com/api/v1/wholesale-markets. Free, no key.","outputModes":["application/json"]},{"id":"wholesale-power","name":"Wholesale (day-ahead) electricity prices","tags":["prices","real-prices-paid","wholesale-power"],"inputModes":["application/json"],"description":"Wholesale electricity prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_wholesale_power_prices; REST GET https://proofprice.com/api/v1/wholesale-power. Free, no key.","outputModes":["application/json"]},{"id":"check","name":"Price check","tags":["prices","price-check"],"inputModes":["application/json"],"description":"Is a quoted price typical? Compares it with recorded prices, with evidence, source and licence. MCP tool pricepaid_check_price; REST GET https://proofprice.com/api/v1/check. 20 free a day, then paid per call with x402 once payments are on: see https://proofprice.com/pricing.","outputModes":["application/json"]}],"iconUrl":"https://proofprice.com/icon.svg","version":"0.4.0","provider":{"url":"https://proofprice.com","organization":"ProofPrice"},"security":[],"description":"Prices people actually paid, from official open data: homes, rents, fuel, energy, food, medicines. This is a read-only price service reached over MCP (https://proofprice.com/api/mcp) and REST (https://proofprice.com/api/v1). It does not run A2A message exchange: use the MCP or REST endpoints, or read https://proofprice.com/llms.txt.","capabilities":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false},"x-proofprice":{"mcp":"https://proofprice.com/api/mcp","llms":"https://proofprice.com/llms.txt","contact":"hello@proofprice.com","openapi":"https://proofprice.com/openapi.json","pricing":"https://proofprice.com/pricing.json","urlNote":"url is the REST base, not an A2A endpoint","a2aMessaging":false,"mcpServerCard":"https://proofprice.com/.well-known/mcp-server-card"},"protocolVersion":"0.3.0","securitySchemes":{},"documentationUrl":"https://proofprice.com/connect","defaultInputModes":["application/json"],"defaultOutputModes":["application/json"],"preferredTransport":"HTTP+JSON"},"signature_status":"unsigned","signature_detail":"No card signature supplied","signature_key_url":null,"signature_checked_at":"2026-10-24T05:43:18.863775+00:00","domain_claimed_at":null,"domain_proof_checked_at":null,"source_name":"Publisher Agent Card","source_url":"https://proofprice.com/.well-known/agent-card.json","last_check":{"checked_at":"2026-10-24T05:43:18.863775+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"also_published_at":[],"history_urls":["https://proofprice.com/.well-known/agent-card.json"],"skills":[{"skill_id":"flights","name":"Airfares paid","description":"Airfares paid: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_airfare_prices; REST GET https://proofprice.com/api/v1/airfares. Free, no key.","tags":["prices","real-prices-paid","flights"],"quality_warning":false},{"skill_id":"border-prices","name":"Border prices: customs unit values per kilogram","description":"Border prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_border_prices; REST GET https://proofprice.com/api/v1/border-prices. Free, no key.","tags":["prices","real-prices-paid","border-prices"],"quality_warning":false},{"skill_id":"construction","name":"Building cost per square metre","description":"Construction costs: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_construction_costs; REST GET https://proofprice.com/api/v1/construction. Free, no key.","tags":["prices","real-prices-paid","construction"],"quality_warning":false},{"skill_id":"cars","name":"Car-related prices actually paid","description":"Car prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_car_prices; REST GET https://proofprice.com/api/v1/cars. Free, no key.","tags":["prices","real-prices-paid","cars"],"quality_warning":false},{"skill_id":"childcare","name":"Childcare prices paid","description":"Childcare prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_childcare_prices; REST GET https://proofprice.com/api/v1/childcare. Free, no key.","tags":["prices","real-prices-paid","childcare"],"quality_warning":false},{"skill_id":"commercial-property","name":"Commercial property and land sale prices actually paid","description":"Commercial property and land sales: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_commercial_property; REST GET https://proofprice.com/api/v1/commercial-property. Free, no key.","tags":["prices","real-prices-paid","commercial-property"],"quality_warning":false},{"skill_id":"diet-costs","name":"Cost of a healthy diet per person per day","description":"Healthy diet cost: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_diet_costs; REST GET https://proofprice.com/api/v1/diet-costs. Free, no key.","tags":["prices","real-prices-paid","diet-costs"],"quality_warning":false},{"skill_id":"medical","name":"Doctor and hospital prices paid","description":"Doctor and hospital prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_medical_prices; REST GET https://proofprice.com/api/v1/medical. Free, no key.","tags":["prices","real-prices-paid","medical"],"quality_warning":false},{"skill_id":"farm-prices","name":"Farm and wholesale food prices","description":"Farm and wholesale food prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_farm_prices; REST GET https://proofprice.com/api/v1/farm-prices. Free, no key.","tags":["prices","real-prices-paid","farm-prices"],"quality_warning":false},{"skill_id":"farm-gate-prices","name":"Farm-gate prices received by farmers (monthly)","description":"Farm-gate prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_farm_gate_prices; REST GET https://proofprice.com/api/v1/farm-gate-prices. Free, no key.","tags":["prices","real-prices-paid","farm-gate-prices"],"quality_warning":false},{"skill_id":"producer-prices","name":"Farm-gate producer prices (annual)","description":"Farm-gate producer prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_producer_prices; REST GET https://proofprice.com/api/v1/producer-prices. Free, no key.","tags":["prices","real-prices-paid","producer-prices"],"quality_warning":false},{"skill_id":"land-prices","name":"Farmland prices and rents","description":"Farmland prices and rents: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_land_prices; REST GET https://proofprice.com/api/v1/land-prices. Free, no key.","tags":["prices","real-prices-paid","land-prices"],"quality_warning":false},{"skill_id":"contracts","name":"Government contract prices (what public buyers paid)","description":"Government contract prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_contract_prices; REST GET https://proofprice.com/api/v1/contracts. Free, no key.","tags":["prices","real-prices-paid","contracts"],"quality_warning":false},{"skill_id":"groceries","name":"Grocery and everyday prices","description":"Grocery prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_grocery_prices; REST GET https://proofprice.com/api/v1/groceries. Free, no key.","tags":["prices","real-prices-paid","groceries"],"quality_warning":false},{"skill_id":"health-insurance","name":"Health insurance premiums (approved tariffs)","description":"Health insurance premiums: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_health_insurance_premiums; REST GET https://proofprice.com/api/v1/health-insurance. Free, no key.","tags":["prices","real-prices-paid","health-insurance"],"quality_warning":false},{"skill_id":"home-sales","name":"Home sale prices actually paid","description":"Home sales: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_home_sales; REST GET https://proofprice.com/api/v1/home-sales. Free, no key.","tags":["prices","real-prices-paid","home-sales"],"quality_warning":false},{"skill_id":"home-upgrades","name":"Home upgrade costs (heat pumps, solar, insulation, windows)","description":"Home upgrade prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_home_upgrade_prices; REST GET https://proofprice.com/api/v1/home-upgrades. Free, no key.","tags":["prices","real-prices-paid","home-upgrades"],"quality_warning":false},{"skill_id":"hotels","name":"Hotel room prices","description":"Hotel room prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_hotel_prices; REST GET https://proofprice.com/api/v1/hotels. Free, no key.","tags":["prices","real-prices-paid","hotels"],"quality_warning":false},{"skill_id":"energy","name":"Household electricity and gas prices","description":"Household and business energy prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_energy_prices; REST GET https://proofprice.com/api/v1/energy. Free, no key.","tags":["prices","real-prices-paid","energy"],"quality_warning":false},{"skill_id":"insurance","name":"Insurance premiums paid","description":"Insurance premiums: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_insurance_prices; REST GET https://proofprice.com/api/v1/insurance. Free, no key.","tags":["prices","real-prices-paid","insurance"],"quality_warning":false},{"skill_id":"fuel","name":"Live fuel prices at the pump","description":"Live fuel prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_fuel_prices_now; REST GET https://proofprice.com/api/v1/fuel. Free, no key.","tags":["prices","real-prices-paid","fuel"],"quality_warning":false},{"skill_id":"broadband","name":"Mobile and broadband prices","description":"Mobile and broadband prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_broadband_prices; REST GET https://proofprice.com/api/v1/broadband. Free, no key.","tags":["prices","real-prices-paid","broadband"],"quality_warning":false},{"skill_id":"medicines","name":"Official pharmacy prices of medicines","description":"Medicine prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_medicine_prices; REST GET https://proofprice.com/api/v1/medicines. Free, no key.","tags":["prices","real-prices-paid","medicines"],"quality_warning":false},{"skill_id":"check","name":"Price check","description":"Is a quoted price typical? Compares it with recorded prices, with evidence, source and licence. MCP tool pricepaid_check_price; REST GET https://proofprice.com/api/v1/check. 20 free a day, then paid per call with x402 once payments are on: see https://proofprice.com/pricing.","tags":["prices","price-check"],"quality_warning":false},{"skill_id":"price-levels","name":"Price levels: how expensive a country is compared with others","description":"Price level: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_price_levels; REST GET https://proofprice.com/api/v1/price-levels. Free, no key.","tags":["prices","real-prices-paid","price-levels"],"quality_warning":false},{"skill_id":"surplus-auctions","name":"Public auction prices (winning bids on surplus goods)","description":"Public auction prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_auction_prices; REST GET https://proofprice.com/api/v1/auctions. Free, no key.","tags":["prices","real-prices-paid","surplus-auctions"],"quality_warning":false},{"skill_id":"rent","name":"Rents paid","description":"Rents paid: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_rent_prices; REST GET https://proofprice.com/api/v1/rent. Free, no key.","tags":["prices","real-prices-paid","rent"],"quality_warning":false},{"skill_id":"tuition","name":"University tuition fees","description":"University tuition fees: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_tuition_fees; REST GET https://proofprice.com/api/v1/tuition. Free, no key.","tags":["prices","real-prices-paid","tuition"],"quality_warning":false},{"skill_id":"wholesale-power","name":"Wholesale (day-ahead) electricity prices","description":"Wholesale electricity prices: official price data with its source, licence and basis stated in each answer (read the basis: some are real sales, some official statistics, some posted prices). MCP tool pricepaid_wholesale_power_prices; REST GET https://proofprice.com/api/v1/wholesale-power. 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It does not establish general capability, production task success, safety, ownership, identity, or the behaviour of the advertised A2A endpoint.","methodology_url":"https://localmark.ai/capability-tests","history":[]},"_localmark":{"contribution":{"optional":true,"directory_access":"free","operator_authorization_required":true,"affects_rankings":false,"message":"LocalMark is free. Optional contributions help fund ongoing checks.","support_url":"https://localmark.ai/support","metadata_url":"https://localmark.ai/api/v1/support/contributions"}}}