Do I need a Reddit developer account?

No. There is no Reddit app, OAuth flow or app review. One InsightSocial API key works for this endpoint and every other platform, and your first 10 calls priced at 100 credits or less are free.

How do I get every result, not just the first page?

This endpoint pages. Each response carries pagination.next_cursor and pagination.has_more. Send next_cursor back unchanged as the cursor parameter and stop when has_more is false. Every page is a separate call and is charged as one.

What happens if the account is private or nothing is found?

You get an error or an empty result, and it costs 0 credits. The API reads public Reddit data only, so private accounts and deleted content come back as not found rather than as partial data.

Can I call the Reddit Subreddits Search API from Claude, ChatGPT or Cursor?

Yes. Add the hosted MCP server at https://api.insightsocial.app/mcp to your AI app and sign in. The assistant finds this endpoint by name, shows its price and calls it with your credits.

GET /v1/reddit/subreddits/search

Reddit Subreddits Search API

Returns up to 25 communities matching a topic, each with the name at author.id, subscriber count, description and icon. include=details adds the creation date, weekly activity, rules and language.

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10–260 credits, metered · cursor pagination · failed calls free · 10 free calls to start

curl "https://api.insightsocial.app/v1/reddit/subreddits/search?query=machine+learning" \
-H "x-api-key: $INSIGHTSOCIAL_API_KEY"

200 OKJSON

{
"success": true,
"platform": "reddit",
"endpoint": "/v1/reddit/subreddits/search",
"schema_version": "2",
"data": {
"items": [
{
"author": {
"id": "<string>",
"username": "<string | null>",
"display_name": "<string | null>",
"avatar_url": "<string | null>",
"bio": "<string | null>",
"verified": "<boolean | null>",
"followers": "<integer | null>",
"followers_approximate": "<boolean | null>",
"following": "<integer | null>",
"posts_count": "<integer | null>",
"likes_count": "<integer | null>",
"url": "<string | null>",
"location": "<string | null>",
"external_url": "<string | null>",
"private": "<boolean | null>",
"joined_at": "<string | null>",
"last_post_at": "<string | null>",
"ext": "<object | null>"
}
}
],
"total": "<integer | null>",
"truncated": "<boolean | null>"
},
"pagination": {
"next_cursor": "<string | null>",
"has_more": "<boolean>"
},
"unavailable": [],
"credits_used": "<integer>"
}

When to use it

Use it to find which communities discuss a subject. Send include=details instead of one subreddit/details call per community, plus 1 per row filled, 26 at most.

Parameters

Query parameters for GET /v1/reddit/subreddits/search. Send your key in the x-api-key header.

Name	Required	Description
query	Yes	Topic or keyword to find communities for.
cursor	No	Cursor to get more results. Get 'cursor' from the previous response.
include	No	Set to details (one token only) to fill author.joined_at, author.ext.weekly_active_users, author.ext.weekly_contributions, author.ext.rules_text and author.ext.language on every row in this one call (a row the details lookup's main source cannot answer gets only the creation date and the language, and is still billed).
limit	No	Take the top N communities of the page (1 to 25). It is not a page size: the cursor still advances past the whole page, so rows beyond N are not returned by the next page.

Response fields

The same unified schema every platform returns, so code written for Reddit works on the other eight. A field the platform did not provide is null and listed in unavailable.

Field	Type	Notes
id	string	An identifier, always a string. Never parse it as a number: several platforms use ids above 2^53.
username	string \| null
display_name	string \| null
avatar_url	string \| null
bio	string \| null
verified	boolean \| null
followers	integer \| null	A count. null when the platform does not expose it; 0 only when it is really zero.
followers_approximate	boolean \| null
following	integer \| null	A count. null when the platform does not expose it; 0 only when it is really zero.
posts_count	integer \| null	A count. null when the platform does not expose it; 0 only when it is really zero.
likes_count	integer \| null	A count. null when the platform does not expose it; 0 only when it is really zero.
url	string \| null
location	string \| null
external_url	string \| null
private	boolean \| null
joined_at	string \| null	ISO-8601 timestamp in UTC, ending in Z.
last_post_at	string \| null	ISO-8601 timestamp in UTC, ending in Z.
ext	object \| null	Platform-specific fields, snake_case.

Every field, error and example is in the Reddit Subreddits Search API reference.

How much does the Reddit Subreddits Search API cost?

Metered: 10–260 credits a call. The ceiling is reserved when the call starts and you are charged what it actually read.

Failed calls are free
A call that errors or finds nothing costs 0 credits.
Know the price first
Add dry_run=1 and the response quotes the call without making it. Nothing is charged.
One balance
API calls and Chrome extension exports share the same credits, on the free plan too.

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