# CallChatSyn > Answer small-business customer questions from FAQs, list open appointment times, and book them. - name: com.callchatsyn/callchatsyn - version: 0.1.0 - connection class: R0 (autonomous) - trust: 96/100 - quality: 88/100 (good) - owner: not claimed - descriptor: https://api.protogrid.dev/v1/servers/com.callchatsyn%2Fcallchatsyn - tools: https://api.protogrid.dev/v1/servers/com.callchatsyn%2Fcallchatsyn/tools **An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe. ## Connection (mcpServers) ```json { "mcpServers": { "callchatsyn": { "type": "http", "url": "https://callchatsyn.com/api/mcp", "headers": { "Authorization": "Bearer ${CALLCHATSYN_TOKEN}" } } } } ``` Placeholders to fill: `${CALLCHATSYN_TOKEN}`. ## Trust - hygiene: 100 - liveness: 100 - freshness: 100 - provenance: 85 - drivers: +repository +dns-namespace +website +reachable +uptime-100% +updated-15d-ago - Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. ## Quality 88/100 (good) ### protocol: 75 (weight 25) - warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28 - n/a `protocol.stateless`: only applies to 2026-07-28 servers - pass `protocol.transport`: streamable HTTP - n/a `protocol.list_ttl`: only applies to 2026-07-28 servers ### authorization: n/a (weight 15) - n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth - n/a `auth.secret_in_url`: no templated URL ### tool hygiene: 93 (weight 30) - pass `tools.descriptions`: every tool has a description - pass `tools.description_length`: descriptions are concise - pass `tools.schemas`: every tool has an object input schema - pass `tools.annotations`: 4 of 4 tools declare readOnlyHint or destructiveHint - warn `tools.directory_hints`: 2 of 4 tools declare all four hints; missing: answer_customer_question (destructiveHint); list_open_times (destructiveHint) - pass `tools.token_cost`: about 1,177 tokens to load every tool - pass `tools.api_dump`: tools are not a one-to-one API dump ### stability: 100 (weight 15) - pass `stability.changes`: 1 tool changes in 30 days - pass `stability.rug_pull`: no tool changed its meaning under the same name ### dependencies: n/a (weight 15) - n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package - tools: 4, about 1,177 tokens to load them all - tool set hash: fc8454eb0fe9c78a1ec7e8119a9c2e52 - tools last changed: 2026-10-06T10:35:40.246Z - badge: [![protogrid quality](https://protogrid.dev/badge/com.callchatsyn/callchatsyn.svg)](https://protogrid.dev/servers/com.callchatsyn/callchatsyn) - Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. ### Tool changes - 2026-10-06 `book_appointment` changed (description) - before: Book one appointment for a customer. This creates a real booking: the business is notified, and if it has connected Cal.com the booking is created there too. With the demo key it's a dry run that books nothing. Not idempotent: booking the same time twice fails the second time. Only call it after the customer has confirmed the time and service; needs a 'start' from list_open_times and the customer's email or phone. Errors: 404 the time is no longer offered (call list_open_times again), 409 it was just taken, 400 missing start, service, or both email and phone. Returns JSON { booked, id, start, label }; keep 'id' if the customer may want to cancel. - after: Book one appointment for a customer. This creates a real booking: the business is notified, and if it has connected Cal.com the booking is created there too. With the demo key it's a dry run that books nothing. Not idempotent: booking the same time twice fails the second time. Only call it after the customer has confirmed the time and service; needs a 'start' from list_open_times and the customer's email or phone. Errors: 404 the time is no longer offered (call list_open_times again), 409 it was just taken, 400 missing start, service, or both email and phone, or the business's connected calendar needs a detail the customer didn't give (the message says which, e.g. an email). Returns JSON { booked, id, start, label }; keep 'id' if the customer may want to cancel. Full history: https://api.protogrid.dev/v1/servers/com.callchatsyn%2Fcallchatsyn/changes ## Remotes - https://callchatsyn.com/api/mcp (streamable-http, auth none, reachable true, uptime30d 1) ## Packages _none_ ## Tools (4) - `answer_customer_question`: Answer a customer's message for one small business using only that business's own FAQs and order records. Rule-based, not generated, so it never invents prices or opening hours; English and Chinese are detected automatically. Read-only: it never books or changes anything. Use it first for any customer message. If it returns intent 'appointment', call list_open_times next; if matched is false or intent is 'human_handoff', tell the customer a person will follow up. Authenticates with the connection's API key (Authorization: Bearer ccs_live_…); without a key it answers as a public demo business. Returns JSON { intent, lang, matched, reply, next? }. - `book_appointment`: Book one appointment for a customer. This creates a real booking: the business is notified, and if it has connected Cal.com the booking is created there too. With the demo key it's a dry run that books nothing. Not idempotent: booking the same time twice fails the second time. Only call it after the customer has confirmed the time and service; needs a 'start' from list_open_times and the customer's email or phone. Errors: 404 the time is no longer offered (call list_open_times again), 409 it was just taken, 400 missing start, service, or both email and phone, or the business's connected calendar needs a detail the customer didn't give (the message says which, e.g. an email). Returns JSON { booked, id, start, label }; keep 'id' if the customer may want to cancel. - `cancel_appointment`: Cancel one of the business's bookings by the 'id' that book_appointment returned. This changes data: the time becomes free again, and if the business has connected Cal.com the booking is cancelled there too (Cal.com emails the customer). Only call it after the customer has clearly asked to cancel that specific booking. To reschedule, cancel and then book a new time from list_open_times. With the demo key it's a dry run. Errors: 404 no such booking for this business, 409 already cancelled, 400 not a booking id. Returns JSON { cancelled, id, start }. - `list_open_times`: List the business's next open appointment times: up to 5, soonest first, within the next 7 days, labelled in the business's time zone, plus its services and locations. Read-only. Call it before book_appointment and whenever a customer asks when they can come in. Times come from the business's CallChatSyn hours or from its connected Cal.com calendar. Returns JSON { slots: [{ start, label }], services, locations }; pass a slot's 'start' to book_appointment unchanged. An empty slots list means nothing is open this week.