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Reddit user active communities API

Get the communities a Reddit user is active in by username: each one's name, members and icon, all in one page (215 of them were recorded for one account). About 40 items a call, 500 at most; $0.0020 per call. Errors, timeouts and objects that do not exist are not charged; an empty result is charged $0.0020.

GEThttps://api.dataxapi.com/v1/reddit/users/subreddits/list
Also known asuser active subredditsredditor communitiesIn Chinese: Reddit 用户活跃社区 API
username is in the link: reddit.com/r/<username>/comments/1nnrvkr/.
Price$0.0020/ call · Errors and timeouts are not charged
Returnsup to 500 a pageeverything in one answer, no paging
When an upstream failsRetried for youon the same route, or a backup route; never charged
StatusLive statusChecked daily with real calls · 4 days on record

Try it

Change a value and the request on the right follows.
Run · $0.0020

Sign in to run it; it runs on your own balance. New accounts can try this endpoint free, up to 50 calls.

Used to call POST /v1/reddit/users/active-subreddits? It is this address now. What changed for old endpoints

The first 2 rows of a response recorded 2026-10-12 22:12 UTC.
FieldValue
nsfwfalse
metrics.members37,695,204
curl -G "https://api.dataxapi.com/v1/reddit/users/subreddits/list" \
  --data-urlencode "username=nasa" \
  -H "Authorization: Bearer $DATAXAPI_API_KEY"
{
  "code": "ok",
  "request_id": "1d8f00c9-76ad-4d6b-bfc5-6ce8107bc04d",
  "data": {
    "items": [
      {
        "id": "t5_xf7hfu",
        "name": "Weekendhiking",
        "url": "https://www.reddit.com/r/northsidecoffee/",
        "avatar_url": "https://styles.redditmedia.com/t5_cbnkie/styles/profileIcon_p7flwpskrg9gc.png",
        "nsfw": false,
        "metrics": { "members": 37695204 }
      },
      // … 36 more
    ]
  },
  "page": {
    "next_cursor": null,
    "cursor_expires_at": null,
    "has_more": false,
    "returned": 37
  },
  "warnings": [],
  "meta": {
    "capability": "reddit.users.subreddits.list",
    "result_status": "complete",
    "fetched_at": "2026-10-12T22:12:52.000Z",
    "cached": false,
    "replayed": false,
    "unavailable": {
      "description": "capability",
      "created_at": "capability"
    },
    "billing": {
      "amount": "0.002",
      "currency": "USD",
      "balance_after": "9.998"
    }
  }
}

From a response recorded 2026-10-12 22:12 UTC. Names, text and IDs are examples, and so are the links: none is the recorded one (the page shows no one's personal data); the figures are as recorded. Long lists are cut. The request ID, cursor and balance are made up.

Size as sent: 10.7 KB in the standard view (4.7 KB compact, 12.4 KB full).

{
  "code": "ok",
  "request_id": "0d853665-5dc1-4f58-b4a2-f5ff50cc6ce4",
  "data": { "items": [] },
  "page": {
    "next_cursor": null,
    "cursor_expires_at": null,
    "has_more": false,
    "returned": 0
  },
  "warnings": [],
  "meta": {
    "capability": "reddit.users.subreddits.list",
    "result_status": "empty",
    "fetched_at": "2026-10-12T22:12:44.000Z",
    "cached": false,
    "replayed": false,
    "unavailable": {
      "description": "capability",
      "created_at": "capability"
    },
    "billing": {
      "amount": "0.002",
      "currency": "USD",
      "balance_after": "9.998"
    }
  }
}

From a response recorded 2026-10-12 22:12 UTC. The request ID and balance are made up.

Size as sent: 463 B in the standard view (463 B compact, 463 B full).

This example as a JSON file

curl -G "https://api.dataxapi.com/v1/reddit/users/subreddits/list" \
  --data-urlencode "username=nasa" \
  -H "Authorization: Bearer $DATAXAPI_API_KEY"
from dataxapi import DataXAPI

dx = DataXAPI()  # reads DATAXAPI_API_KEY
result = dx.reddit.users.subreddits.list(username="nasa")
print(result["data"]["items"])
import { DataXAPI } from "@dataxapi/sdk";

const dx = new DataXAPI(); // reads DATAXAPI_API_KEY
const result = await dx.reddit.users.subreddits.list({ username: "nasa" });
console.log(result.data.items);
dataxapi call reddit.users.subreddits.list username=nasa
{
  "mcpServers": {
    "dataxapi": {
      "type": "http",
      "url": "https://api.dataxapi.com/mcp",
      "headers": {
        "Authorization": "Bearer ${DATAXAPI_API_KEY}"
      }
    }
  }
}

Add this to your MCP client, then ask your agent to call reddit.users.subreddits.list.

Parameters

usernametextrequired

Reddit username, without the u/. Example: nasa.

viewtext

How much of each item to return. All three cost the same. Values: compact, standard (default), full.

fieldslist of text

Return only these fields. Each by its path, such as author.name.

Known limits

Returned fields

data.items is a list of community objects. Preview: the structure may change, announced beforehand.

idtextcompact

ID; pass it unchanged to the endpoints that get the community and list its posts

On this platform: The community's name; pass it unchanged to the community profile and community posts endpoints

nametextcompact

Name of the community

On this platform: The community's name, without the r/

urllinkcompact

Link that opens the community

descriptiontextcompactNot provided here

What the community says it is about

Long text: the compact view keeps the first 500 characters and says so in warnings.

avatar_urllinkstandard

The community's icon

nsfwyes/nostandard

Whether it is marked not safe for work

Show all 14 fields →
created_attimestandardNot provided here

When the community was created

metricsobjectcompact

Community counts

metrics.membersintegercompact

Members

On this platform: People subscribed to the community

ext.fullnametextfull

The platform's internal ID of the community (it starts with t5_)

ext.typetextfull

How open the community is (public, restricted and so on), as the platform words it

approximatelist of objectcompact

Which numbers of this item are approximate or lower bounds; absent when all are exact

approximate[].fieldtextcompact

Path of the field, such as metrics.views

approximate[].kindtextcompact

Approximate, or a lower boundapproximatelower_bound

Typical size of one item: compact 119 B, standard 285 B, full 331 B (measured on the response recorded 2026-10-12 22:12 UTC).

What this endpoint cannot give

descriptionNot provided here
created_atNot provided here

When you are charged

A result with data$0.0020, once per call
An empty result$0.0020
Invalid parameters, a failure of ours or of the data source, a timeoutnot charged
CaseCharged
The object does not exist (404)not charged
The most one call can cost$0.0020 (send X-Max-Price to refuse anything above your own limit)

Prices as read 2026-10-21 09:10 UTC, under price book 2, in effect since 2026-10-17 11:00 UTC; the Playground reads the price in force before a run.

If the object does not exist

The answer is 404 not_found and nothing is charged. reason says which: not_found (it does not exist) or private_or_deleted.

Errors

What this endpoint can answer with; codes all endpoints share are on the full list.

HTTPCodeMeaningCharged
400invalid_paramsA parameter is invalidRetry: After a fixNo
402insufficient_balanceThe balance is too lowRetry: After a fixNo
404not_foundThe object does not exist, is private or was deletedRetry: NoNo
502upstream_failedThe data source failedRetry: YesNo
504timeoutThe data did not arrive in time; retry with the same idempotency keyRetry: YesNo

All error codes →

Questions

How much does the Reddit user active communities API cost?

$0.0020 per call. The most one call can cost is $0.0020.

When am I not charged?

Errors, timeouts and objects that do not exist are not charged; an empty result is charged $0.0020.

How many items does one call return, and how do I get the next page?

About 40 items a page, 500 at most. The page size is the platform's; limit is not accepted. Everything comes in one page; no cursor is issued.

What happens if the object does not exist?

The answer is 404 not_found and nothing is charged. reason says which: not_found (it does not exist) or private_or_deleted.

All 11 Reddit endpoints

Reddit endpoints
Reddit post comments$0.0020Reddit post detail$0.0020Reddit post search$0.0020Reddit popular posts$0.0020Reddit community posts$0.0020Reddit trending searches$0.0020Reddit user profile$0.0020Reddit user posts$0.0020Reddit community profile$0.0020Reddit user active communities$0.0020Reddit video transcript$0.0020

Use it in your AI

Copy this prompt

Your API key is built in, so there is nothing to configure.

Read https://dataxapi.com/agents.md and set up DataXAPI in this agent. My API key is dx_…; use it for every DataXAPI call.
Sign in to copy it with your key

No account yet? Sign-up takes an email and no card, and a failed call is never charged.

then paste

Paste it into your agent

It reads the page the prompt points to and connects itself.

Your agent
Read https://dataxapi.com/agents.md and set up DataXAPI in this agent. My API key is dx_••••; use it for every DataXAPI call.
DataXAPI connected · 5 tools ready
now try it

Now ask something

Use one of these, or your own words.

Read https://dataxapi.com/apis/reddit/users/subreddits/list.md and help me use the DataXAPI endpoint reddit.users.subreddits.list (Reddit user active communities).
Prefer to set it up by hand?
dataxapi setupgives the agents on your machine (Claude Code, Codex, Cursor) the DataXAPI MCP server and the base skill. The key is read from DATAXAPI_API_KEY; none is written into a file.MCP server: https://api.dataxapi.com/mcp. The entry for your client is under MCP in the request examples of this page; then ask your agent to call reddit.users.subreddits.list.Other clients →
Ask with this pageSends the Markdown version
Open in ChatGPTOpen in ClaudeOther clients →
Brief for an AIEverything needed to call it, as text
Show the text
Use the DataXAPI endpoint reddit.users.subreddits.list (Reddit user active communities). Get the communities a Reddit user is active in by username: each one's name, members and icon, all in one page (215 of them were recorded for one account).
Call GET https://api.dataxapi.com/v1/reddit/users/subreddits/list with the header "Authorization: Bearer $DATAXAPI_API_KEY". Read the key from the environment variable DATAXAPI_API_KEY; never write it into code.
Parameters:
- username (required): Reddit username, without the u/. Example: nasa.
- view: How much of each item to return. All three cost the same. Values: compact, standard (default), full.
- fields: Return only these fields. Each by its path, such as author.name.
Price: $0.0020 per call. Errors, timeouts and objects that do not exist are not charged; an empty result is charged $0.0020.
The answer is JSON: data.items holds community; meta.billing.amount is what this call was charged.
Example:
curl -G "https://api.dataxapi.com/v1/reddit/users/subreddits/list" \
  --data-urlencode "username=nasa" \
  -H "Authorization: Bearer $DATAXAPI_API_KEY"
Full reference in Markdown: https://dataxapi.com/apis/reddit/users/subreddits/list.md

Names and identifiers

In Chinese
Reddit 用户活跃社区 API
Endpoint ID
reddit.users.subreddits.list
Endpoint
GET /v1/reddit/users/subreddits/list
Last checked 2026-10-21 09:10 UTC.View the Markdown versionopenapi.jsonllms.txt

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207 endpoints on 21 platforms, from $0.0003 a call. Errors and timeouts are not charged.

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