Reference

MCP server

Read-only tools over the same capability graph. Every response carries `source`, `verified_at` and `confidence`, so an agent can tell a sourced fact from a guess — and Railor never returns the second.

Install

claude mcp add --transport http railor http://localhost:3000/api/mcp \
  --header "Authorization: Bearer rail_test_your_key_here"

Cursor and VS Code read the mcp.json shape directly. Antigravity needs serverUrl instead of url — its own docs say the legacy field isn't supported. Codex reads the token from an env var, not an inline string. The developer portal has a one-click Cursor install link.

Tools

search_corridorsEvaluate every mapped provider against a corridor.

check_eligibilityAsk about one provider and get the reason, not just a verdict.

search_providersList providers filtered by product, asset or network.

compare_providersLine up 2–4 providers on the same capability rows.

get_provider_capabilitiesFull normalized capability set with evidence.

get_provider_changesDetected changes with review status.

get_kyb_requirementsNormalized onboarding requirements.

get_supported_countriesCountries indexed by Railor.

get_supported_currenciesFiat currencies and stablecoins indexed by Railor.

Ask your agent

“Which mapped providers can settle USDC on Base into an AED business account for an Indian-incorporated entity? Show the reason and the source for each.”

Tool calls require a key. `initialize` and `tools/list` are open so a client can discover the server before authenticating.