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Mercury is Legible to agents.
Discry independently scored how well an AI agent can discover and understand the Mercury API from what’s public — measuring discovery and comprehension separately, not a single blended number.
Familiarity 67% · what a model knew before reading the docs
Discovery
61 / 100OpenAPI specfound at https://mercury.com/api-docs but invalid: unparseablePartial
llms.txt102 described linksPass
llms-full.txtnot presentFail
AGENTS.mdnot found in repoFail
.well-known/mcp.jsonnot presentFail
MCP registrysmithery match for "mercury"Pass
robots.txt AI directivesparsed AI-bot rulesPass
Sitemapincludes docs pagesPass
Comprehension
76 / 100Factual recall0/2 passed
Request construction1/1 passed
Absence honesty1/1 passed
Where agents fail
What HTTP header (exact header name) must carry the API credential on requests to this API? — 3/3 runs failed
How does a client target this API's test or sandbox environment (e.g. a distinct key prefix, separate base URL, or header)? — 3/3 runs failed
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