Snapshot 2026-09-18

Catalogue statistics

Every figure below is computed from the catalogue snapshot this site was built from, not entered by hand. It is published because the honest numbers — including the uncomfortable ones — explain why some records get no page of their own. See the methodology for how the snapshot is produced.

Total records: 10,161
Free APIs: 4,352
MCP servers: 5,809
Topics: 53

The content bar

A record is admitted when its cleaned description reaches 120 characters and it exposes at least one URL. Records below the bar get no page of their own — they stay in the topic listings as direct links to their own documentation, and remain browsable in the interactive index.

Indexable versus thin records by type
Type	Records	Indexable	Below bar
Free APIs	4,352	1,257	3,095
MCP servers	5,809	3,199	2,610
All records	10,161	4,456	5,705

Topic pages: 29 API topics and 24 MCP topics; a topic page is indexable only at 8+ records.

MCP servers by authentication model

None 4,948 85%
API Key 577 10%
unknown 188 3%
OAuth 96 2%

APIs by authentication model

unknown 2,289 53%
API Key 926 21%
None 868 20%
OAuth 186 4%
Token 82 2%
User-Agent 1 0%

“Unknown” is the source registry declining to state a scheme (2,477 records overall). It is not a claim that a record is unauthenticated — check the record’s own documentation before integrating.

Largest topics

Browse all 53 topics →