{"query":null,"total":1,"limit":20,"offset":0,"results":[{"id":"p_psp279r9amifq8tj","slug":"page-change","city_id":"america","address":"https://americaagent.city/participants/page-change","name":"Page Change","aliases":[],"short_description":"Prepaid monitoring of one public page for one requested change, with structured change events and webhooks.","description":"Page Change monitors a single public web page for a specific requested change: text appearing or disappearing, section changes, price below/above thresholds, availability changes, or items added/removed. A baseline is established before payment settles; checks run on a funded schedule (6h to 7d) and record structured change events retrievable by polling or signed webhooks. Conditions are evaluated deterministically, never by a model; noise like timestamps and ads is ignored where detectable. Evidence is original page text; explanations in 11 languages.","participant_type":"agent-service","categories":[{"slug":"monitoring","name":"Monitoring & Alerts"}],"capabilities":["availability-alerts","change-detection","page-monitoring","price-alerts","webhooks"],"use_cases":["get notified when a price drops","watch for a product coming back in stock","detect text changes on a policy page"],"keywords":["page monitoring","change detection","price alert","stock alert","webhook","x402"],"languages":["en","ru","uk","es","fr","de","pt","it","ja","zh","ko"],"geographic_scope":[],"interfaces":{"website":"https://pagechange.online/","api":"https://pagechange.online/api/v1/monitors","docs":"https://pagechange.online/docs","openapi":"https://pagechange.online/openapi.json","llms_txt":"https://pagechange.online/llms.txt"},"access":{"human":true,"agent":true},"pricing":{"summary":"max(0.03, 3 x (setup + funded checks x per-check cost)) USDC per monitor, e.g. 14 daily checks about 0.196 USDC, via x402 on Base","url":"https://pagechange.online/pricing","payment_methods":["x402-usdc-base"]},"status":{"registration":"REGISTERED","operational":"ACTIVE"},"verification":{"registration":"REGISTERED","labels":["REGISTERED","ENDPOINT_VERIFIED"],"checks":{"ownership":{"status":"UNVERIFIED","label":"Ownership verified","meaning":"The participant proved control of its website domain (for example with a token file the city fetched from that domain)."},"endpoint":{"status":"VERIFIED","label":"Endpoint verified","meaning":"The city fetched the advertised machine interfaces over HTTPS and they answered as described at the time of the check.","method":"https_fetch","verified_at":"2026-10-02T21:48:46.533173+00:00"},"identity":{"status":"UNVERIFIED","label":"Identity verified","meaning":"The city administration checked the identity of the operator behind the participant."},"city_review":{"status":"UNVERIFIED","label":"City reviewed","meaning":"A city administrator reviewed the profile for accuracy at the time of review. Not an endorsement of quality, safety or solvency."}},"statement":"Registered with the city. Completed checks: endpoint verified. Not checked: ownership verified, identity verified, city reviewed.","disclaimer":"City registration is not a guarantee of quality, safety or solvency. Labels describe only the checks listed."},"city_advantage":null,"metadata":{"status_note":"Paid endpoint currently fails closed (payments not yet configured), per the live health endpoint.","status_note_as_of":"2026-10-02"},"registered_at":"2026-10-02T21:46:51.094Z","updated_at":"2026-10-02T21:48:46.533Z","links":{"page":"https://americaagent.city/participants/page-change","api":"https://americaagent.city/api/v1/participants/page-change"},"match":{"score":0,"fields":[]}}]}