Appointment Booking
REMOTE · HATCHLOOP.DEV · SCANNED SEP 20
Find real businesses and book appointments. Books via Cal.com; imports 12 platforms.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (schedule_appointment). See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability84
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 1306 tokens (~93/item across 14 items; 9 tools + 5 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management73
- Stability observed for 22 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage84
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 52% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 9 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 11 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the Appointment Booking MCP server?
Appointment Booking is a hosted endpoint at https://hatchloop.dev/mcp/appointment-booking, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · hatchloop.dev
claude mcp add --transport http dev-hatchloop-appointment-booking 'https://hatchloop.dev/mcp/appointment-booking'
{
"mcpServers": {
"dev-hatchloop-appointment-booking": {
"url": "https://hatchloop.dev/mcp/appointment-booking"
}
}
} {
"servers": {
"dev-hatchloop-appointment-booking": {
"type": "http",
"url": "https://hatchloop.dev/mcp/appointment-booking"
}
}
} [mcp_servers.dev-hatchloop-appointment-booking] url = "https://hatchloop.dev/mcp/appointment-booking"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"dev-hatchloop-appointment-booking": {
"type": "remote",
"url": "https://hatchloop.dev/mcp/appointment-booking",
"enabled": true
}
}
} openclaw mcp add dev-hatchloop-appointment-booking --url 'https://hatchloop.dev/mcp/appointment-booking' --transport streamable-http
mcp_servers:
dev-hatchloop-appointment-booking:
url: "https://hatchloop.dev/mcp/appointment-booking" {
"McpServers": {
"dev-hatchloop-appointment-booking": {
"Transport": "http",
"Url": "https://hatchloop.dev/mcp/appointment-booking"
}
}
} assistant mcp add dev-hatchloop-appointment-booking -t streamable-http -u 'https://hatchloop.dev/mcp/appointment-booking'
{
"mcpServers": {
"dev-hatchloop-appointment-booking": {
"type": "http",
"url": "https://hatchloop.dev/mcp/appointment-booking"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.
- 15 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.
- 13 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.
- 11 Sept 26 +3
- Tool “check_booking_link” rewrote its description, which is the text the model reads security
- Tool “find_business” rewrote its description, which is the text the model reads security
- Tool “get_outcome” rewrote its description, which is the text the model reads security
- Tool “get_status” rewrote its description, which is the text the model reads security
- Tool “import_booking_url” rewrote its description, which is the text the model reads security
- Tool “preview_cost” rewrote its description, which is the text the model reads security
- Tool “schedule_appointment” rewrote its description, which is the text the model reads security
- Tool “self_test” rewrote its description, which is the text the model reads security
- Tool “verify_business” rewrote its description, which is the text the model reads security
- Schema quality: fail → pass ▲ functional
- “check_booking_link” reworded the description of “url” cosmetic
- “find_business” reworded the description of “availability_window” cosmetic
- “find_business” reworded the description of “capability” cosmetic
- “import_booking_url” reworded the description of “booking_url” cosmetic
- “import_booking_url” reworded the description of “business_name” cosmetic
- “import_booking_url” reworded the description of “country_code” cosmetic
- “import_booking_url” reworded the description of “vertical” cosmetic
- 10 Sept 26 −2
- HSTS header: pass → fail ▼ security
- 8 Sept 26 +4
- MCP protocol: fail → pass ▲ functional
- MCP protocol version: 2024-11-05 → 2025-11-25 functional
- 6 Sept 26 +1
- Server version: 0.2.12 → 0.2.13 functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Probed https://hatchloop.dev/mcp/appointment-booking
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=hatchloop.dev | CN=YE2,O=Let's Encrypt,C=US | 9 Sept 2026 | 8 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 585b21c0597f38a72ae9ec226ee06a39406 |
| SANs: hatchloop.dev | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of hatchloop.dev. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| dev. | present | 60074 | 8 | Verified |
| hatchloop.dev. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://hatchloop.dev/mcp/appointment-booking | Verified | 200 | |
| http (plaintext) | http://hatchloop.dev/mcp/appointment-booking | HTTPS enforced | 308 | https://hatchloop.dev/mcp/appointment-booking |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
check_booking_link ~126
Free, instant pre-flight check for a booking URL. Classifies which booking platform a URL belongs to and tells you whether import_booking_url will accept it, WITHOUT fetching the page or spending money. Returns the platform, the exact smb_id import_booking_url would assign, the channels the booking will route through, and the inferred country. Use it to de-risk a paid booking BEFORE calling import_booking_url + schedule_appointment. [free, no key]
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Full http(s) URL to classify, e.g. 'https://cal.com/jane' or… |
No output schema declared.
No examples provided.
find_business ~157
Given criteria (vertical, location, capability, price band, availability window), return ranked candidate businesses from our supply network. THE NETWORK IS SMALL AND STILL MOSTLY SAMPLE DATA: entries that are not real are named [DEMO] and flagged is_demo - check that field before acting on a result. [free, no key]
| Name | Type | Req | Description |
|---|---|---|---|
| availability_window | object | – | Accepted but NOT APPLIED - it does not narrow results. We do not hold live… |
| capability | string | – | Specific service capability required, e.g. 'haircut', 'plumbing',… |
| location | object | yes | – |
| max_results | integer | – | – |
| price_band | object | – | – |
| vertical | string | yes | Service vertical to search within |
No output schema declared.
No examples provided.
get_outcome ~33
Retrieve the final OutcomeReceipt for a completed operation. [free, no key]
| Name | Type | Req | Description |
|---|---|---|---|
| operation_id | string | yes | – |
No output schema declared.
No examples provided.
get_status ~36
Query the current state of any in-flight async operation by operation_id. [free, no key]
| Name | Type | Req | Description |
|---|---|---|---|
| operation_id | string | yes | – |
No output schema declared.
No examples provided.
import_booking_url ~303
Turn ANY public booking URL (Cal.com, Calendly, Doctolib, Booksy, Fresha, OpenTable, Setmore, Square, Acuity, Schedulista, Squarespace, BookMyCity) into a callable smb_id you can immediately use with schedule_appointment, send_message, or capture_lead. Idempotent — calling twice returns the same smb_id. [free, requires key]
| Name | Type | Req | Description |
|---|---|---|---|
| booking_url | string | yes | Full URL the user supplied. Must point at one of the 12 supported booking… |
| business_name | string | – | Optional override. If omitted, the business name is auto-extracted from the… |
| capabilities | array | – | Free-form capability tags (e.g., ['haircut','color','blowdry']). |
| contact_email | string | – | Optional. |
| contact_phone | string | – | Optional. If omitted, the platform integration handles outreach. |
| country_code | string | – | ISO 3166-1 alpha-2 (e.g. 'US', 'FR'). Used for compliance routing on later… |
| idempotency_key | string | – | Optional client-supplied key for safe retries. Replaying the same key within 24h returns the original receipt - the operation is NOT re-executed and NOT re-charged. |
| vertical | string | – | Best-guess vertical. If omitted, inferred from the platform (e.g., Doctolib ->… |
No output schema declared.
No examples provided.
preview_cost ~95
Return an expected cost estimate, latency estimate, and success-probability estimate for a proposed call before execution. Returns the exact price when it is fixed, and a min/max range when the cost depends on channel or outcome. It does not promise an accuracy percentage - check cost_range. [free, no key]
| Name | Type | Req | Description |
|---|---|---|---|
| operation | string | yes | – |
| params | object | yes | The same request body you would pass to the operation |
No output schema declared.
No examples provided.
schedule_appointment ~172
Availability lookup, hold, confirm, reschedule, or cancel appointments with an SMB. Routes through the SMB's native booking system if available, falls back to voice AI or web form. [from $0.15/call, variable] [async→get_outcome]
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | – |
| customer | object | – | – |
| existing_appointment_id | string | – | Required for reschedule/cancel |
| idempotency_key | string | – | Optional client-supplied key for safe retries. Replaying the same key within 24h returns the original receipt - the operation is NOT re-executed and NOT re-charged. |
| notes | string | – | – |
| requested_time | object | – | – |
| service | string | – | – |
| smb_id | string | yes | – |
No output schema declared.
No examples provided.
self_test ~54
Service health probe: runs 6 internal checks and reports how many passed. Confirms the server is up and responding - it does NOT probe each tool individually. Use to verify connectivity before production use. [free, no key]
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
verify_business ~72
Look up what we know about a business in our supply network: its contact channels, capabilities, and when the record was last verified. This is a DIRECTORY LOOKUP - it does not contact the business. [free, no key]
| Name | Type | Req | Description |
|---|---|---|---|
| capability_to_verify | string | – | – |
| smb_id | string | yes | – |
No output schema declared.
No examples provided.
What is the Appointment Booking MCP server?
Appointment Booking is an MCP server listed in the public MCP registry as dev.hatchloop/appointment-booking. Find real businesses and book appointments. Books via Cal.com; imports 12 platforms. This page covers its hosted endpoint (https://hatchloop.dev/mcp/appointment-booking).
Is the Appointment Booking MCP server safe to use?
Appointment Booking scores 75 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Appointment Booking MCP server expose?
Appointment Booking exposes 9 tools: find_business, verify_business, schedule_appointment, get_status, get_outcome, and 4 more. Their descriptions and schemas cost roughly 1,048 tokens of context every time the server is loaded.
Does the Appointment Booking MCP server require authentication?
No. We connected to Appointment Booking without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Appointment Booking MCP server still maintained?
Appointment Booking is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.