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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "callchatsyn": {
      "type": "http",
      "url": "https://callchatsyn.com/api/mcp",
      "headers": {
        "Authorization": "Bearer ${CALLCHATSYN_TOKEN}"
      }
    }
  }
}

claude mcp add --transport http callchatsyn https://callchatsyn.com/api/mcp --header "Authorization: Bearer ${CALLCHATSYN_TOKEN}"

[mcp_servers.callchatsyn]
url = "https://callchatsyn.com/api/mcp"
bearer_token_env_var = "CALLCHATSYN_TOKEN"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "callchatsyn": {
      "type": "remote",
      "url": "https://callchatsyn.com/api/mcp",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer {env:CALLCHATSYN_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "callchatsyn": {
      "type": "http",
      "url": "https://callchatsyn.com/api/mcp",
      "headers": {
        "Authorization": "Bearer ${CALLCHATSYN_TOKEN}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=callchatsyn&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vY2FsbGNoYXRzeW4uY29tL2FwaS9tY3AiLCJoZWFkZXJzIjp7IkF1dGhvcml6YXRpb24iOiJCZWFyZXIgJHtDQUxMQ0hBVFNZTl9UT0tFTn0ifX0%3D"
}

{
  "servers": {
    "callchatsyn": {
      "type": "http",
      "url": "https://callchatsyn.com/api/mcp",
      "headers": {
        "Authorization": "Bearer ${CALLCHATSYN_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "callchatsyn": {
      "httpUrl": "https://callchatsyn.com/api/mcp",
      "headers": {
        "Authorization": "Bearer ${CALLCHATSYN_TOKEN}"
      }
    }
  }
}

extensions:
  "callchatsyn":
    enabled: true
    name: "callchatsyn"
    type: streamable_http
    uri: "https://callchatsyn.com/api/mcp"
    headers:
      "Authorization": "Bearer ${CALLCHATSYN_TOKEN}"
    timeout: 300

Placeholders to fill from your own secret store: ${CALLCHATSYN_TOKEN}. The registry never accepts secret values.

Quality 88 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene93 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations4 of 4 tools declare readOnlyHint or destructiveHint
warn
tools.directory_hints2 of 4 tools declare all four hints; missing: answer_customer_question (destructiveHint); list_open_times (destructiveHint)
pass
tools.token_costabout 1,177 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changes1 tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

4 tools, about 1,177 tokens to load them all · tool set fc8454eb0fe9 · tools last changed 2026-10-06 · checked 2026-10-19 10:52 UTC

Tool changes

2026-10-06book_appointmentchangeddescription
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 · 88% of words in common
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: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 96 / 100

provenance85

liveness100

freshness100

hygiene100

+repository +dns-namespace +website +reachable +uptime-100% +updated-13d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://callchatsyn.com/api/mcp` streamable-http	none	yes	100%	606 ms	2025-11-25	2026-10-19

Tools (4)

`answer_customer_question`read-only	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`destructive	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`read-only	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.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "com.callchatsyn/callchatsyn",
  "title": "CallChatSyn",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://callchatsyn.com/api/mcp",
      "type": "streamable-http",
      "headers": [
        {
          "name": "Authorization",
          "isSecret": true,
          "description": "Optional. 'Bearer ccs_live_…' from Dashboard > Developers. Without it, the public demo business is used and bookings are dry runs."
        }
      ]
    }
  ],
  "version": "0.1.0",
  "repository": {
    "url": "https://github.com/oneappsworld/callchatsyn-mcp",
    "source": "github"
  },
  "websiteUrl": "https://callchatsyn.com/developers",
  "description": "Answer small-business customer questions from FAQs, list open appointment times, and book them."
}