JustFix Estimator
REMOTE · ESTIMATOR-MCP.JUSTFIX.APP · SCANNED SEP 21
Quote UK trades jobs from any AI agent. Price breakdown + tappable booking link.
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 Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- 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 Usability83
- 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 209 tokens (~41/item across 5 items; 3 tools + 2 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 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
- Supports UI / widget rendering.Pass
How do I install the JustFix Estimator MCP server?
JustFix Estimator is a hosted endpoint at https://estimator-mcp.justfix.app/mcp, 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 · estimator-mcp.justfix.app
claude mcp add --transport http just-fix-justfix-skill 'https://estimator-mcp.justfix.app/mcp'
{
"mcpServers": {
"just-fix-justfix-skill": {
"url": "https://estimator-mcp.justfix.app/mcp"
}
}
} {
"servers": {
"just-fix-justfix-skill": {
"type": "http",
"url": "https://estimator-mcp.justfix.app/mcp"
}
}
} [mcp_servers.just-fix-justfix-skill] url = "https://estimator-mcp.justfix.app/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"just-fix-justfix-skill": {
"type": "remote",
"url": "https://estimator-mcp.justfix.app/mcp",
"enabled": true
}
}
} openclaw mcp add just-fix-justfix-skill --url 'https://estimator-mcp.justfix.app/mcp' --transport streamable-http
mcp_servers:
just-fix-justfix-skill:
url: "https://estimator-mcp.justfix.app/mcp" {
"McpServers": {
"just-fix-justfix-skill": {
"Transport": "http",
"Url": "https://estimator-mcp.justfix.app/mcp"
}
}
} assistant mcp add just-fix-justfix-skill -t streamable-http -u 'https://estimator-mcp.justfix.app/mcp'
{
"mcpServers": {
"just-fix-justfix-skill": {
"type": "http",
"url": "https://estimator-mcp.justfix.app/mcp"
}
}
} 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.
- 21 Sept 26 0
- Resource “service-estimate-card” now points somewhere else: ui://widgets/apps-sdk/service-estimate-card.html → ui://widgets/ext-apps/service-estimate-card.html security
- 20 Sept 26 0
- Resource “service-estimate-card” now points somewhere else: ui://widgets/apps-sdk/service-estimate-card.html → ui://widgets/ext-apps/service-estimate-card.html security
- 19 Sept 26 0
- Resource “service-estimate-card” now points somewhere else: ui://widgets/apps-sdk/service-estimate-card.html → ui://widgets/ext-apps/service-estimate-card.html security
- 18 Sept 26 0
- Resource “service-estimate-card” now points somewhere else: ui://widgets/apps-sdk/service-estimate-card.html → ui://widgets/ext-apps/service-estimate-card.html security
- 17 Sept 26 0
- Resource “service-estimate-card” now points somewhere else: ui://widgets/apps-sdk/service-estimate-card.html → ui://widgets/ext-apps/service-estimate-card.html security
- 16 Sept 26 0
- Resource “service-estimate-card” now points somewhere else: ui://widgets/apps-sdk/service-estimate-card.html → ui://widgets/ext-apps/service-estimate-card.html security
- 15 Sept 26 0
- Resource “service-estimate-card” now points somewhere else: ui://widgets/apps-sdk/service-estimate-card.html → ui://widgets/ext-apps/service-estimate-card.html security
- 14 Sept 26 0
- Resource “service-estimate-card” now points somewhere else: ui://widgets/apps-sdk/service-estimate-card.html → ui://widgets/ext-apps/service-estimate-card.html security
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 21 Sept 2026 · Probed https://estimator-mcp.justfix.app/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=estimator-mcp.justfix.app | CN=YR1,O=Let's Encrypt,C=US | 23 Aug 2026 | 21 Nov 2026 | RSA 2048 | SHA256-RSA | 5e5ccb8de636758341bec69956923b35c04 |
| SANs: estimator-mcp.justfix.app | ||||||
| CN=YR1,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | a20253f15f2691c05dc1ce13b9bcca4e |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of estimator-mcp.justfix.app. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| app. | present | 23684 | 8 | Verified |
| justfix.app. | 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 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://estimator-mcp.justfix.app/mcp | Verified | 200 | |
| http (plaintext) | http://estimator-mcp.justfix.app/mcp | HTTPS enforced | 308 | https://estimator-mcp.justfix.app/mcp |
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 →
call_out_fee Call Out Fee ~40
Get the call-out fee that applies to bookings. Use when the customer asks about the call-out fee, booking fee, or upfront cost for a booking.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
list_services List Services ~35
Get a list of all services we provide. Use when the customer asks what services are available, what you can book, or similar.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
service-estimate-card ~110
Service estimate summary card with external action link.
| Name | Type | Req | Description |
|---|---|---|---|
| booking_description | string | yes | A description of the work to be completed. |
| estimate | number | – | The time, in hours, estimated to complete the job. |
| service_code | string | yes | The slug of the service to create a service estimate card for. Use a code from list_services (e.g. electrical, plumbing, heating_and_gas). |
| work_items | array | – | Optional list of tasks/scope items for the job. |
No output schema declared.
No examples provided.
What is the JustFix Estimator MCP server?
JustFix Estimator is an MCP server listed in the public MCP registry as io.github.Just-Fix/justfix-skill. Quote UK trades jobs from any AI agent. Price breakdown + tappable booking link. This page covers its hosted endpoint (https://estimator-mcp.justfix.app/mcp).
Is the JustFix Estimator MCP server safe to use?
JustFix Estimator scores 89 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 JustFix Estimator MCP server expose?
JustFix Estimator exposes 3 tools: list_services, call_out_fee, service-estimate-card. Their descriptions and schemas cost roughly 185 tokens of context every time the server is loaded.
Does the JustFix Estimator MCP server require authentication?
No. We connected to JustFix Estimator without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the JustFix Estimator MCP server still maintained?
JustFix Estimator is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.