# io.github.jdhart81/taxcredit-engine (remote · mcp.viridisconservation.com)

Auditable US clean-energy tax-credit scenarios for 45Q, 45V, 45Y, 48E, and 45X.

- Trust score: 58/100 (low)
- Change this week: +6
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `mcp.viridisconservation.com`: 58/100 (this document), [markdown](https://verifymcp.io/servers/jdhart81-taxcredit-engine/taxcredit-engine-mcp.md), [page](https://verifymcp.io/servers/jdhart81-taxcredit-engine/taxcredit-engine-mcp)

## Channel facts

- Endpoint: `https://mcp.viridisconservation.com/taxcredit-engine/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## 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 2026-08-03.

- **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 5 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**: 46/100
  - AI-judged instruction clarity (poor).
  - Tool/resource definitions use about 304 tokens (~60/item across 5 items; 5 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **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 (100% of tools); any adoption earns full credit.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http jdhart81-taxcredit-engine https://mcp.viridisconservation.com/taxcredit-engine/mcp
```

### Codex

```toml
[mcp_servers.jdhart81-taxcredit-engine]
url = "https://mcp.viridisconservation.com/taxcredit-engine/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "jdhart81-taxcredit-engine": {
      "type": "remote",
      "url": "https://mcp.viridisconservation.com/taxcredit-engine/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add jdhart81-taxcredit-engine --url https://mcp.viridisconservation.com/taxcredit-engine/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  jdhart81-taxcredit-engine:
    url: "https://mcp.viridisconservation.com/taxcredit-engine/mcp"
```

### Other

```json
{
  "mcpServers": {
    "jdhart81-taxcredit-engine": {
      "type": "http",
      "url": "https://mcp.viridisconservation.com/taxcredit-engine/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.

### 2026-08-02 (score 58, +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.

### 2026-07-31 (score 57, +3)

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

### 2026-07-30 (score 54, +1)

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

### 2026-07-28 (score 53, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 52, +1)

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

### 2026-07-26 (score 51)

First indexed and scored.

## MCP tools (5)

### `calculate_tax_credit` (~153 tokens)

Calculate an auditable tax-credit scenario. credit is 45Q, 45V, 45Y,
    48E, or 45X. facts must contain the explicit credit-specific eligibility
    facts; missing facts return indeterminate. This is not tax or filing advice.
    Price: $2.00 per call after 10 free calls/day. Pay at
    /x402/taxcredit-engine/calculate_tax_credit with Base USDC, cash-fund
    payment_ref through escrow_checkout + confirm_escrow_funding, or use /seats.

Input parameters:

- `credit` (string, required)
- `facts` (object, required)
- `payment_ref`
- `request_id`

Output parameters:

- `result` (string)

### `list_rule_packs` (~21 tokens)

List supported credits and the current bundled rule-pack digest.

Output parameters:

- `result` (string)

### `get_rule_pack` (~28 tokens)

Return the bundled rules and official source metadata for one credit.

Input parameters:

- `credit` (string, required)

Output parameters:

- `result` (string)

### `verify_tax_credit_result` (~51 tokens)

Verify an engine result's audit_sha256. Pass the prior result object as
    JSON; any changed amount, fact, rule step, or source digest fails.

Input parameters:

- `result_json` (string, required)

Output parameters:

- `result` (string)

### `describe_agent` (~18 tokens)

Return fleet-standard capabilities, version, and pricing.

Output parameters:

- `result` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/jdhart81-taxcredit-engine/taxcredit-engine-mcp#diagnostics

## Score history

- 2026-08-03: 58
- 2026-08-02: 58
- 2026-08-01: 57
- 2026-07-31: 57
- 2026-07-30: 54
- 2026-07-29: 53
- 2026-07-28: 53
- 2026-07-27: 52
- 2026-07-26: 51

## Links

- Remote endpoint: https://mcp.viridisconservation.com/taxcredit-engine/mcp
- Repository: https://github.com/jdhart81/viridis-agent-fleet
- Changelog RSS feed: https://verifymcp.io/servers/jdhart81-taxcredit-engine/taxcredit-engine-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/jdhart81-taxcredit-engine/taxcredit-engine-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/jdhart81-taxcredit-engine/taxcredit-engine-mcp