{"entry":{"slug":"postcodes-io-api","name":"Postcodes.io","category":"api","summary":"UK postcode lookup and reverse geocoding, free and keyless.","description":"","auth_mode":"None","endpoint":"https://api.postcodes.io/postcodes/<postcode>","docs_url":"https://postcodes.io/docs","tags":["geocoding","address"],"capabilities":["validate address","postcode lookup","reverse geocoding"],"auth_params":[],"input_format":"Path parameters","output_format":"application/json","rate_limit":"Fair use","pricing":"Free (open data)","invocation_example":"curl https://api.postcodes.io/postcodes/SW1A1AA","verified":false,"verified_at":null,"featured":false,"checks_total":56,"checks_ok":56,"avg_latency_ms":10,"reports_count":0,"health_ok":true,"health_status_code":200,"health_checked_at":"2026-11-06T13:17:34.806+00:00","health_latency_ms":9,"probe_url":null},"watch":{"hint":"Follow \"postcodes-io-api\": get alerted when it goes down, comes back, or changes shape. Free, 3 tools per key. Email follows are confirmed by a one-click email before alerts start.","how":"POST https://agentnexus.app/api/public/watch with {\"slug\":\"postcodes-io-api\"} and your x-api-key (the key's email gets the alerts), or add \"email\" / \"webhook_url\". Email follows must be confirmed from the inbox before alerts start."}}