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Substack Category Leaderboard
x402
Substack Category Leaderboard is a paid API for AI agents from x402.apidirect.io, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-30).
Returns the ranked list of top Substack publications in a given category, with full details including subscriber badge, pricing, paid tier, and author info.
Price / call$0.004
Success—
StatusUnknown
How this service works
Get a Substack category's leaderboard: the top publications ranked by Substack, each with its full details (subscriber badge, paid band, prices, author) and rank.
Output
A paginated ranked list of Substack publications for the specified category, each entry including rank position, publication name, subdomain, subscriber badge level, paid subscription band, pricing tiers, and author details. Up to 25 publications per page.
Example use cases
Discover top newsletters in a niche
“Show me the top Substack publications in the technology category, just the paid ones, starting from page 1.”
Track rising newsletters for market research
“I'm doing competitive research — can you get the rising Substack newsletters in the finance category and tell me who's gaining traction?”
Find top podcasts on Substack site-wide
“What are the top Substack podcasts across the whole platform? Pull the site-wide podcast leaderboard for me.”
Technical details
Endpoint
GEThttps://x402.apidirect.io/v1/substack/category/publications?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need ranked leaderboard data for Substack publications within a specific category, including tier filtering (all, paid, rising) and pagination. Prefer this over the Substack search endpoint when you want Substack's own ranking signal rather than keyword-based search results.
Side effects
- Invalid or unrecognized category ID/slug returns an error or empty results
- Page number out of range (above 21 for standard, above 4 for rising/bestsellers/podcasts) returns an error
- Invalid tier enum value returns a validation error
- Payment not processed results in 402 response
- Rate limits exceeded return a 429 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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