gtmmcps.
Tool record

usefulapi.io documentation

Research date: 2026-09-07

Documentation coverage: partial.

Reference index, not a mirror of complete vendor documentation. Retrieved pages do not prove the MCP works.

What it does

A hosted catalogue of 146 single-application MCP servers, one per SaaS product, each on its own subdomain, wrapping that product's public REST API as a named tool list with per-tool read and write labels and the underlying REST call documented against each tool.

Access and connection

MCP support: official

Access requirements: free - every server page publishes the same two tiers, "Free 100 tool calls / month" and "Pro $9/mo" or "$90/yr", which is the cheapest paid tier of any gateway in this file.

Authentication: per-application OAuth. The setup instructions add the subdomain as a custom connector and the user then authenticates with the wrapped vendor when prompted, so usefulapi brokers the connection rather than taking an API key up front.

Research checked: 2026-09-07

These details come from the catalog research. Check the vendor sources below for current setup instructions. They do not establish that a connection or tool call was tested.

Sources

Retrieved pages

Markdown JSON