"Railway" matching MCP connectors:

Validate CSV columns, find duplicates and invalid values, and clean files with explicit rules. Row-level reports, no stored files. Run the fixed free sample without a key. Custom CSV: EUR 9 for 100 operations, valid 90 days, no subscription. Setup: https://import-check-production.up.railway.app/docs/

Verify claims, citations & agent actions. Free receipt trial; paid prices via live R/IV quotes.

Resolve whether an uncertain side-effecting action completed before software retries it.

Paid website acceptance testing for AI agents. Quick $3, Full $12, $100 credit pack. MCP + REST.

Accounts-payable exception environment with a pass/fail verifier and proof packet: AI agents work AP

Deterministic JSON Schema validation with exact violations and conservative type normalization.