usedby MCP server

• Registry nameai.usedby/usedbyverified in the MCP registry

The registry name sits under usedby.ai. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-19
• Tools5
• Server calls itselfusedby
• Server version1.3.0
• Protocol version2025-06-18

On 2026-10-19 the server answered initialize and tools/list without a sign-in. First answer in 221 ms.

• Answeredmeasuring1 of the 7 daily checks it takes to print a share
• Median first answer232 ms
• Space in an agent's context≈ 985 tokensthe definitions of all its tools (5), which an agent carries on every turn
• Tool definitionsA · 100 of 100

• Every tool passes all six checks.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work.

• search_tools

  Find AI and software tools tracked on usedby by name, other product name, or what they do (category or topic, e.g. 'CRM', 'translation'), with how many companies publicly use each.

• who_uses

  Companies that publicly use a tool, strongest proof first, each with its proof level (CONFIRMED, DECLARED: the company states it, OBSERVED, or SIGNAL: a job post, the weakest proof), source page and first public proof date.

• company_stack

  Tools a company publicly uses according to usedby, strongest proof first, each with its proof level (job-post signals last) and source page.

• recent_changes

  Companies newly listed as customers by tool vendors in the last N days, optionally for one tool. Departures are not published.

• compare

  Two tools side by side: public customers with their proof mix, top industries, the companies on both (every proof level, each side's level given), and vendor facts with their sources.