# 53ON (remote · 53on.com)

Directory and marketplace of local businesses and independent professionals near you.

- Trust score: 81/100 (high trust)
- Change this week: +2
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-22

## Components

- remote · `53on.com`: 81/100 (this document), [markdown](https://verifymcp.io/servers/com-53on-directory/53on.md), [page](https://verifymcp.io/servers/com-53on-directory/53on)

## Channel facts

- Endpoint: `https://53on.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-22.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 2 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 76/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 297 tokens (~148/item across 2 items; 2 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 100/100
  - No destabilizing schema changes in the last 30 days.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 2 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the 53ON MCP server?

53ON is a hosted endpoint at https://53on.com/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.

### Claude

```bash
claude mcp add --transport http com-53on-directory 'https://53on.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-53on-directory": {
      "url": "https://53on.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-53on-directory": {
      "type": "http",
      "url": "https://53on.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-53on-directory]
url = "https://53on.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-53on-directory": {
      "type": "remote",
      "url": "https://53on.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-53on-directory --url 'https://53on.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-53on-directory:
    url: "https://53on.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-53on-directory": {
      "Transport": "http",
      "Url": "https://53on.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-53on-directory -t streamable-http -u 'https://53on.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-53on-directory": {
      "type": "http",
      "url": "https://53on.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-20 (score 81, +1)

- [security] Stability: 0.97 → pass

### 2026-09-18 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-15 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-11 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-07 (score 75, +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.

### 2026-09-05 (score 74, +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.

## MCP tools (2)

### `search_providers` (~166 tokens)

Find local businesses and independent professionals on 53ON by what they do. Accepts free text in Spanish or English and resolves synonyms, so "plumber" and "destapar caneria" both work. Pass lat and lng to limit results to that area; without them the search is nationwide. Call with an empty query to get the list of services 53ON covers.

Input parameters:

- `lang` (string): Language of the query. Default es.
- `lat` (number): Latitude of the user. Optional.
- `limit` (integer): Max results, 1 to 50. Default 10.
- `lng` (number): Longitude of the user. Optional.
- `query` (string): What the user needs, in their own words. Empty returns the service list.

### `get_business` (~85 tokens)

Full public detail of one 53ON business by its slug: services, ratings, product catalog with prices, and the link where the user can request a quote and pay. Use the slug returned by search_providers.

Input parameters:

- `lang` (string): Language for service names. Default es.
- `slug` (string, required): Public slug of the business, for example creacionlaura.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-53on-directory/53on#diagnostics

## Score history

- 2026-09-22: 81
- 2026-09-21: 81
- 2026-09-20: 81
- 2026-09-19: 80
- 2026-09-18: 80
- 2026-09-17: 79
- 2026-09-16: 79
- 2026-09-15: 79
- 2026-09-14: 78
- 2026-09-13: 78
- 2026-09-12: 77
- 2026-09-11: 77
- 2026-09-10: 76
- 2026-09-09: 76
- 2026-09-08: 75
- 2026-09-07: 75
- 2026-09-06: 74
- 2026-09-05: 74
- 2026-09-04: 73
- 2026-09-03: 73
- 2026-09-02: 72
- 2026-09-01: 72
- 2026-08-31: 72
- 2026-08-30: 71
- 2026-08-29: 71
- 2026-08-28: 70
- 2026-08-27: 70
- 2026-08-26: 69
- 2026-08-25: 67
- 2026-08-24: 67

## Common questions

### What is the 53ON MCP server?

53ON is an MCP server listed in the public MCP registry as com.53on/directory. Directory and marketplace of local businesses and independent professionals near you. This page covers its hosted endpoint (https://53on.com/mcp).

### Is the 53ON MCP server safe to use?

53ON scores 81 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 53ON MCP server expose?

53ON exposes 2 tools: search_providers, get_business. Their descriptions and schemas cost roughly 251 tokens of context every time the server is loaded.

### Does the 53ON MCP server require authentication?

No. We connected to 53ON without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the 53ON MCP server still maintained?

53ON is still listed as active in the MCP registry. We last reached this channel on 22 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://53on.com/mcp
- Changelog RSS feed: https://verifymcp.io/servers/com-53on-directory/53on.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-53on-directory/53on.json
- HTML version of this page: https://verifymcp.io/servers/com-53on-directory/53on