# 80% Silver Melt Calculator (remote · 80percentsilver.com)

Live junk silver and gold melt value calculator: spot price, coins, sterling. USD/CAD.

- Trust score: 65/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-29

## Components

- remote · `80percentsilver.com`: 65/100 (this document), [markdown](https://verifymcp.io/servers/com-80percentsilver-silver-melt/80percentsilver.md), [page](https://verifymcp.io/servers/com-80percentsilver-silver-melt/80percentsilver)

## Channel facts

- Endpoint: `https://80percentsilver.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 2026-09-29.

- **Endpoint Security**: 46/100
  - 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 3 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 enforcement could not be verified: the plaintext port answered with HTTP 406, which proves neither a plaintext path nor enforcement.
  - 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**: 66/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 774 tokens (~258/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 50/100
  - Stability observed for 15 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **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 3 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 80% Silver Melt Calculator MCP server?

80% Silver Melt Calculator is a hosted endpoint at https://80percentsilver.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-80percentsilver-silver-melt 'https://80percentsilver.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-80percentsilver-silver-melt": {
      "url": "https://80percentsilver.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-80percentsilver-silver-melt": {
      "type": "http",
      "url": "https://80percentsilver.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-80percentsilver-silver-melt]
url = "https://80percentsilver.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-80percentsilver-silver-melt": {
      "type": "remote",
      "url": "https://80percentsilver.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-80percentsilver-silver-melt --url 'https://80percentsilver.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-80percentsilver-silver-melt:
    url: "https://80percentsilver.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-80percentsilver-silver-melt": {
      "Transport": "http",
      "Url": "https://80percentsilver.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-80percentsilver-silver-melt -t streamable-http -u 'https://80percentsilver.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-80percentsilver-silver-melt": {
      "type": "http",
      "url": "https://80percentsilver.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.

### 2026-09-28 (score 65, +1)

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

### 2026-09-26 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-25 (score 63, 0)

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

### 2026-09-24 (score 63, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-21 (score 62, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-19 (score 61, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-17 (score 60, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-15 (score 59, +1)

- [functional improvement] Stability: unverified → 0.03

## MCP tools (3)

### `get_spot_price` (~78 tokens)

Get the current spot price of silver and gold in USD and CAD per troy ounce. Use this to answer questions about the silver spot price, gold spot price, or the USD→CAD exchange rate used for melt value calculations. Prices are live, cached up to 15 minutes. All prices are per troy ounce (ozt).

### `calculate_melt_value` (~186 tokens)

Calculate the melt value (intrinsic bullion value) of silver or gold from weight and purity — e.g. sterling silver flatware, .999 rounds, scrap gold. Returns melt value in both USD and CAD plus the fine metal weight. Purity is a fraction: 0.925 = sterling, 0.999 = fine silver, 0.9 = US coin silver. Weight units: g (grams), ozt (troy ounces), oz (avoirdupois ounces — postal-scale ounces).

Input parameters:

- `metal` (string, required): Which metal
- `purity` (number, required): Fineness as a fraction, e.g. 0.925 for sterling silver
- `unit` (string, required): Weight unit: g = grams, ozt = troy ounce, oz = avoirdupois ounce
- `weight` (number, required): Gross weight of the item(s)

### `calculate_coin_melt` (~510 tokens)

Calculate the melt value of junk silver coins (constitutional silver) at the current silver spot price: US 90% pre-1965 dimes/quarters/halves/dollars, US 40% Kennedy halves (1965–1970), US 35% war nickels (1942–1945), Canadian 80% (1920–1966/67) and Canadian 50% (1967–68) coins. Provide the coin type plus either a quantity of coins or a total face value (e.g. face_value 2.50 for a roll of dimes). Returns total actual silver weight (ASW) in troy oz and grams, and melt value in USD and CAD.

Input parameters:

- `coin_type` (string, required): Coin preset id. us_90_dime = US 90% dime (pre-1965), 0.0723 ozt ASW each; us_90_quarter = US 90% quarter (pre-1965), 0.1808 ozt ASW each; us_90_half = US 90% half dollar (pre-1965), 0.3617 ozt ASW ea…
- `face_value` (number): Total face value in the coin's own currency, e.g. 2.50 for a roll of dimes
- `quantity` (number): Number of coins (provide this or face_value)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-80percentsilver-silver-melt/80percentsilver#diagnostics

## Score history

- 2026-09-29: 65
- 2026-09-28: 65
- 2026-09-27: 64
- 2026-09-26: 64
- 2026-09-25: 63
- 2026-09-24: 63
- 2026-09-23: 62
- 2026-09-22: 62
- 2026-09-21: 62
- 2026-09-20: 61
- 2026-09-19: 61
- 2026-09-18: 60
- 2026-09-17: 60
- 2026-09-16: 59
- 2026-09-15: 59
- 2026-09-14: 58

## Common questions

### What is the 80% Silver Melt Calculator MCP server?

80% Silver Melt Calculator is an MCP server listed in the public MCP registry as com.80percentsilver/silver-melt. Live junk silver and gold melt value calculator: spot price, coins, sterling. USD/CAD. This page covers its hosted endpoint (https://80percentsilver.com/mcp).

### Is the 80% Silver Melt Calculator MCP server safe to use?

80% Silver Melt Calculator scores 65 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 80% Silver Melt Calculator MCP server expose?

80% Silver Melt Calculator exposes 3 tools: get_spot_price, calculate_melt_value, calculate_coin_melt. Their descriptions and schemas cost roughly 774 tokens of context every time the server is loaded.

### Does the 80% Silver Melt Calculator MCP server require authentication?

No. We connected to 80% Silver Melt Calculator without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the 80% Silver Melt Calculator MCP server still maintained?

80% Silver Melt Calculator is still listed as active in the MCP registry. We last reached this channel on 29 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://80percentsilver.com/mcp
- Website: https://80percentsilver.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-80percentsilver-silver-melt/80percentsilver.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-80percentsilver-silver-melt/80percentsilver.json
- HTML version of this page: https://verifymcp.io/servers/com-80percentsilver-silver-melt/80percentsilver