{"openapi":"3.1.0","info":{"title":"Food Hygiene Ratings API","version":"1.0.0","description":"Search UK food businesses and read hygiene ratings, business details, and local authority lists from the Food Standards Agency Food Hygiene Rating Scheme. Paid with x402 exact USDC on Base. No account is required.","contact":{"email":"support@brainiac.software"},"x-guidance":"BRAINIAC.software is a pay-per-call API for software agents. No account or API key is required.\nPayment uses the x402 protocol with exact USDC on Base (chain id 8453). Each POST operation has a fixed USD price.\nHow to call an operation:\n1. POST JSON matching the requestBody. Invalid input returns 400 with no payment challenge.\n2. A valid unpaid call returns 402 with the exact amount and payTo.\n3. Pay and retry with payment-signature. Payment settles only if the operation returns 2xx. A 4xx/5xx is not charged.\nInclude an Idempotency-Key header of 64 hex characters from 32 random bytes. Reuse that key only for retries of the same operation and request body.\nAll outputs are compliance prechecks, drafts, or data lookups for human review. They are not official determinations, legal advice, identity confirmation, or certified filings. Verify time-sensitive or official data with the cited source before acting."},"servers":[{"url":"https://www.brainiac.software"}],"paths":{"/api/v1/food-safety/search":{"post":{"operationId":"search_food_businesses","summary":"Search food businesses","description":"Search UK food businesses by name, location, postcode, or hygiene rating using the Food Standards Agency Food Hygiene Rating Scheme API.","tags":["food-safety"],"requestBody":{"required":true,"content":{"application/json":{"schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","type":"object","properties":{"query":{"type":"string","minLength":1,"maxLength":200},"ratingValue":{"type":"string","maxLength":50},"businessTypeId":{"type":"integer","minimum":1,"maximum":10000},"localAuthorityId":{"type":"string","maxLength":10},"postcode":{"type":"string","maxLength":20},"latitude":{"type":"number","minimum":-90,"maximum":90},"longitude":{"type":"number","minimum":-180,"maximum":180},"maxDistance":{"type":"number","minimum":0,"maximum":100},"limit":{"default":20,"type":"integer","minimum":1,"maximum":100},"page":{"default":1,"type":"integer","minimum":1,"maximum":9007199254740991}},"required":["query"],"additionalProperties":false},"example":{"query":"Tesco","postcode":"PE13","ratingValue":"5","limit":20}}}},"parameters":[{"name":"Idempotency-Key","in":"header","required":true,"description":"Fresh random 32-byte value encoded as 64 hexadecimal characters. 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