Trust

Where the data comes from, how it is maintained, and how Miles makes money, for a developer deciding whether to build on it.

What you are building on

Every number a tool returns comes from a maintained dataset with a recorded review history. How the data is maintained describes the sources, the review cadence, and what a change looks like. How Miles makes money describes the referral model and why a referral link is never an input to a recommendation.

What that means for an integration

A card, transfer partner or valuation you read today is the same one Miles' own chat reads; there is no separate developer copy.
The keyless catalog API returns the free schema, which is the same for every caller. Account-level figures, such as a user's own multipliers and ongoing value, come only through the MCP tools on that user's grant.
A tool never spends a Miles model call, so what an agent gets back is data and arithmetic, with the reasoning left to the agent.

Changes

Changelog lists dated changes to the APIs. Stability is the promise about what will not change.