Each tool your agent calls through an MCP server uses credits, on top of the message that triggered it. Here is how the cost adds up and where to see it.
What each call costs
Each MCP tool call uses 1 credit, on top of the 1 credit for the reply that triggered it. A reply that makes one tool call costs the message plus one call. A reply that makes two calls costs the message plus two calls. See What counts as a message credit in Mando for how a message credit is counted.
The per-conversation limit
Your agent can make up to five MCP tool calls in a single conversation. The sixth call is stopped and the agent replies with what it already has, so a runaway loop cannot keep spending. Calls stopped by this limit are not billed.
Where it appears in usage
MCP calls are counted across your whole organization and shown on your usage view. See Check your usage to check the current period.
Lower the cost
- Uncheck tools the agent does not need, so it has fewer to call.
- Keep your instructions clear so the agent calls a tool once instead of repeatedly.