MCP server

Taxcredit Engine

io.github.jdhart81/taxcredit-engine

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Working at last checkAbout 549 tokens per request once connected5 tools

https://mcp.viridisconservation.com/taxcredit-engine/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 5
Token cost: About 549 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

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

Gemini CLI

{"mcpServers":{"taxcredit-engine":{"httpUrl":"https://mcp.viridisconservation.com/taxcredit-engine/mcp"}}}

Cursor

{"mcpServers":{"taxcredit-engine":{"url":"https://mcp.viridisconservation.com/taxcredit-engine/mcp"}}}

VS Code

{"servers":{"taxcredit-engine":{"type":"http","url":"https://mcp.viridisconservation.com/taxcredit-engine/mcp"}}}

Antigravity

agy mcp add taxcredit-engine https://mcp.viridisconservation.com/taxcredit-engine/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"taxcredit-engine","server_url":"https://mcp.viridisconservation.com/taxcredit-engine/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"taxcredit-engine","server_url":"https://mcp.viridisconservation.com/taxcredit-engine/mcp"}

calculate_tax_credit ~262 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/taxcr
describe_agent ~52 tokens
Return fleet-standard capabilities, version, and pricing.
get_rule_pack ~74 tokens
Return the bundled rules and official source metadata for one credit.
list_rule_packs ~55 tokens
List supported credits and the current bundled rule-pack digest.
verify_tax_credit_result ~106 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.

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