# MERCATOR Verify (remote · mercator-entity-evidence.fly.dev)

MERCATOR Verify: evidence-backed verification and decision support for autonomous agents.

- Trust score: 75/100 (medium)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-23

## Components

- remote · `mercator-entity-evidence.fly.dev`: 75/100 (this document), [markdown](https://verifymcp.io/servers/arzuo-mercator-company-verification/mercator-entity-evidence.md), [page](https://verifymcp.io/servers/arzuo-mercator-company-verification/mercator-entity-evidence)

## Channel facts

- Endpoint: `https://mercator-entity-evidence.fly.dev/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 2026-10-23.

- **Endpoint Security**: 57/100
  - 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.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - 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**: 69/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 199 tokens (~99/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**: 71/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
  - Structured output schemas are declared (50% of tools); any adoption earns full credit.
- **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 MERCATOR Verify MCP server?

MERCATOR Verify is a hosted endpoint at https://mercator-entity-evidence.fly.dev/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 arzuo-mercator-company-verification 'https://mercator-entity-evidence.fly.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "arzuo-mercator-company-verification": {
      "url": "https://mercator-entity-evidence.fly.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "arzuo-mercator-company-verification": {
      "type": "http",
      "url": "https://mercator-entity-evidence.fly.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.arzuo-mercator-company-verification]
url = "https://mercator-entity-evidence.fly.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "arzuo-mercator-company-verification": {
      "type": "remote",
      "url": "https://mercator-entity-evidence.fly.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add arzuo-mercator-company-verification --url 'https://mercator-entity-evidence.fly.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  arzuo-mercator-company-verification:
    url: "https://mercator-entity-evidence.fly.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "arzuo-mercator-company-verification": {
      "Transport": "http",
      "Url": "https://mercator-entity-evidence.fly.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add arzuo-mercator-company-verification -t streamable-http -u 'https://mercator-entity-evidence.fly.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "arzuo-mercator-company-verification": {
      "type": "http",
      "url": "https://mercator-entity-evidence.fly.dev/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.

### 2026-09-30 (score 75, +1)

- [security] Stability: 0.97 → pass

### 2026-09-28 (score 74, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-27 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-25 (score 73, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-23 (score 72, +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.

### 2026-09-21 (score 71, +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.

### 2026-09-19 (score 70, +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.

### 2026-09-01 (score 0)

- [functional improvement] Stability: unverified → 0.03

## MCP tools (2)

### `entity_evidence` (~99 tokens)

Evidence-backed company facts and current company information for company enrichment and company verification, with field-level sources, freshness and explicit conflicts. Unevidenced fields return UNKNOWN rather than a guess. $0.10 per billable call via x402; a response adding nothing beyond the identifier you supplied is free.

Input parameters:

- `domain` (string)
- `fields` (array, required)
- `max_age_days` (integer)
- `name` (string)

### `entity_evidence_validate` (~66 tokens)

FREE preflight for entity_evidence: check a request and see the price and guarantees before paying. Retrieves nothing and costs nothing.

Input parameters:

- `domain` (string)
- `fields` (array, required)
- `max_age_days` (integer)
- `name` (string)

Output parameters:

- `result` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/arzuo-mercator-company-verification/mercator-entity-evidence#diagnostics

## Score history

- 2026-10-23: 75
- 2026-10-22: 75
- 2026-10-21: 75
- 2026-10-20: 75
- 2026-10-19: 75
- 2026-10-18: 75
- 2026-10-17: 75
- 2026-10-16: 75
- 2026-10-15: 75
- 2026-10-14: 75
- 2026-10-13: 75
- 2026-10-12: 75
- 2026-10-10: 75
- 2026-10-04: 75
- 2026-10-03: 75
- 2026-10-02: 75
- 2026-10-01: 75
- 2026-09-30: 75
- 2026-09-29: 74
- 2026-09-28: 74
- 2026-09-27: 74
- 2026-09-26: 73
- 2026-09-25: 73
- 2026-09-24: 72
- 2026-09-23: 72
- 2026-09-22: 71
- 2026-09-21: 71
- 2026-09-20: 70
- 2026-09-19: 70
- 2026-09-18: 69

## Common questions

### What is the MERCATOR Verify MCP server?

MERCATOR Verify is an MCP server listed in the public MCP registry as io.github.Arzuo/mercator-company-verification. MERCATOR Verify: evidence-backed verification and decision support for autonomous agents. This page covers its hosted endpoint (https://mercator-entity-evidence.fly.dev/mcp).

### Is the MERCATOR Verify MCP server safe to use?

MERCATOR Verify 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 MERCATOR Verify MCP server expose?

MERCATOR Verify exposes 2 tools: entity_evidence, entity_evidence_validate. Their descriptions and schemas cost roughly 165 tokens of context every time the server is loaded.

### Does the MERCATOR Verify MCP server require authentication?

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

### Is the MERCATOR Verify MCP server still maintained?

MERCATOR Verify is still listed as active in the MCP registry. We last reached this channel on 23 October 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://mercator-entity-evidence.fly.dev/mcp
- Repository: https://github.com/Arzuo/mercator
- Website: https://mercator-entity-evidence.fly.dev/
- Changelog RSS feed: https://verifymcp.io/servers/arzuo-mercator-company-verification/mercator-entity-evidence.xml
- Changelog JSON feed: https://verifymcp.io/servers/arzuo-mercator-company-verification/mercator-entity-evidence.json
- HTML version of this page: https://verifymcp.io/servers/arzuo-mercator-company-verification/mercator-entity-evidence