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io.github.Mad-Man-Dan/karbon-mcp-server

io.github.Mad-Man-Dan/karbon-mcp-server·v0.2.4·Finance & Payments

Unofficial MCP server for Karbon practice management: contacts, work, time, invoices, payments.

In-path gate · all MCP tools

Using io.github.Mad-Man-Dan/karbon-mcp-server in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

curl -fsSL https://mcpindex.ai/install.sh | sh
Auditable install path →Watch it hold a drift →
Trust verdict · v1 advisory · method
NOT YET SCREENEDno verdict on file

Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: the eval, four-state verdict, honest limits.

Own this server? Screen its description →

Environment variables
KARBON_BEARER_TOKEN
requiredsecret

Bearer token (Application Authorization Token) from Karbon → Settings → Connected Apps → API Applications

KARBON_ACCESS_KEY
requiredsecret

Access key (JWT starting with 'ey') from Karbon → Settings → Connected Apps → API Applications

KARBON_READ_ONLY

Set to 'true' to disable all create/update tools (they are not registered at all)

KARBON_ALLOW_PAYMENT_WRITES

Set to 'true' to enable the payment write tools (create/delete/reverse manual payments); off by default

MCP quality score · maturity, not trust · methodology
freshness
25
completeness
10
installability
25
documentation
15
stability
5
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