Endpoint Playground

Try the Substack User Activity API

Test Crawlora's Substack User Activity API with realistic prefilled parameters. Generate a cURL request, inspect the expected structured JSON response, and open the full docs or pricing page when you are ready to integrate this public web data extraction endpoint into your application.

Endpoint facts

Method: GET
API path: /substack/user/activity
Platform: Substack
Auth: apiKey
Credits: 3 credits/request
Required params: user_id
Common optional params: types, cursor

Substack User Activity API documentation Substack platform page Crawlora API pricing Try List Substack categories API Try Substack Category Rankings API Try Substack Explore Feed API Try Substack Leaderboard API Try Get one public Substack Note API

Prefilled cURL

curl "https://api.crawlora.net/api/v1/substack/user/activity?user_id=<user_id>" \
  -H "x-api-key: $CRAWLORA_API_KEY"

Request parameters visible to crawlers

Parameter	Type	Required	Description
user_id	integer	Yes	Numeric user id from the user endpoint
types	string	No	Comma-separated activity kinds: note, post, like, replies, restack
cursor	string	No	Opaque cursor from a previous response's next_cursor

Example JSON response

{
  "code": 200,
  "data": {
    "user_id": 49731969,
    "types": [
      "note"
    ],
    "next_cursor": "eyJiZWZvcmVfdGltZXN0YW1wIjoi...",
    "has_more": true,
    "items": [
      {
        "kind": "note",
        "timestamp": "2026-09-02T10:14:33.120Z",
        "note": {
          "id": 321037621,
          "body": "A note the user wrote.",
          "author_handle": "kittyunderhill",
          "url": "https://substack.com/@kittyunderhill/note/c-321037621",
          "reaction_count": 18,
          "is_ai_generated": false
        }
      }
    ]
  },
  "msg": "success"
}

Public Playground

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Sample responses, schemas, request previews, and code snippets are visible before sign in. Create an account when you are ready to save an API key and run authenticated requests.

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Endpoint

Choose one catalog endpoint for this request.

1 shown

Group

Method

Auth

Endpoint

GETapiKey3 credits/requestsubstack.userActivityResponseDocSubstack

GET /substack/user/activity

List a Substack user's public activity

Returns one page of a user's public activity: the notes they wrote, posts they published, and items they liked, replied to, or restacked. types is an optional comma-separated filter accepting `note`, `post`, `like`, `replies` and `restack`; omit it for the default mixed feed. Each item's kind is the upstream's own finer-grained label, so filtering on `restack` returns both `comment_restack` and `post_restack` items. Pagination is cursor-based.

API key required. Paste a full key or rotate one from the API Keys page.

Set up API key

View docs

API key

API key required for live requests. Your key is only used to send requests from this Playground.

not configured

Active Playground key: not configured

Manage API keys in Console

Required query parameters

user_id

requiredinteger

Numeric user id from the user endpoint

Add an API key to send a live request.

If an active API key is configured, Copy cURL includes it. Share links never include API keys.

View docs

Sample responseGET

Shown before your first request. Add an API key and send a request to see the live response, status, latency, and headers.

{
  "code": 200,
  "data": {
    "user_id": 49731969,
    "types": [
      "note"
    ],
    "next_cursor": "eyJiZWZvcmVfdGltZXN0YW1wIjoi...",
    "has_more": true,
    "items": [
      {
        "kind": "note",
        "timestamp": "2026-09-02T10:14:33.120Z",
        "note": {
          "id": 321037621,
          "body": "A note the user wrote.",
          "author_handle": "kittyunderhill",
          "url": "https://substack.com/@kittyunderhill/note/c-321037621",
          "reaction_count": 18,
          "is_ai_generated": false
        }
      }
    ]
  },
  "msg": "success"
}

Endpoint details

Method: GET
Path: /substack/user/activity
Authentication: apiKey
Credit cost: 3 credits/request
Platform: Substack
Parameters: 4 documented fields

Request parameters

user_id:querytypes:querycursor:queryx-api-key:header

Response schema fields

codedatadata.has_moredata.itemsdata.items[].kinddata.items[].notedata.items[].note.attached_postdata.items[].note.attached_post.iddata.items[].note.attached_post.titledata.items[].note.attached_post.urldata.items[].note.author_bestseller_tierdata.items[].note.author_handle

Sample response summary

{
  "code": 200,
  "data": {
    "user_id": 49731969,
    "types": [
      "note"
    ],
    "next_cursor": "eyJiZWZvcmVfdGltZXN0YW1wIjoi...",
    "has_more": true,
    "items": [
      {
        "kind": "note",
        "timestamp": "2026-09-02T10:14:33.120Z",
        "note": {
          "id": 321037621,
          "body": "A note the user wrote.",
          "author_handle": "kittyunderhill",
          "url": "https://substack.com/@kittyunderhill/note/c-321037621",
          "reaction_count": 18,
          "is_ai_generated": false
        }
      }
    ]
  },
  "msg": "success"
}

cURL example

curl "https://api.crawlora.net/api/v1/substack/user/activity?user_id=<user_id>" \
  -H "x-api-key: $CRAWLORA_API_KEY"

View endpoint docs Open platform page Browse all endpoints Pricing List Substack categories List the publications ranked in one Substack category Browse the public Substack Explore surface List a Substack category's bestseller leaderboard Get one public Substack Note

Endpoint Playground

Try the Substack User Activity API

Endpoint facts

Method: GET
API path: /substack/user/activity
Platform: Substack
Auth: apiKey
Credits: 3 credits/request
Required params: user_id
Common optional params: types, cursor

Prefilled cURL

curl "https://api.crawlora.net/api/v1/substack/user/activity?user_id=<user_id>" \
  -H "x-api-key: $CRAWLORA_API_KEY"

Request parameters visible to crawlers

Parameter	Type	Required	Description
user_id	integer	Yes	Numeric user id from the user endpoint
types	string	No	Comma-separated activity kinds: note, post, like, replies, restack
cursor	string	No	Opaque cursor from a previous response's next_cursor

Example JSON response

{
  "code": 200,
  "data": {
    "user_id": 49731969,
    "types": [
      "note"
    ],
    "next_cursor": "eyJiZWZvcmVfdGltZXN0YW1wIjoi...",
    "has_more": true,
    "items": [
      {
        "kind": "note",
        "timestamp": "2026-09-02T10:14:33.120Z",
        "note": {
          "id": 321037621,
          "body": "A note the user wrote.",
          "author_handle": "kittyunderhill",
          "url": "https://substack.com/@kittyunderhill/note/c-321037621",
          "reaction_count": 18,
          "is_ai_generated": false
        }
      }
    ]
  },
  "msg": "success"
}

Public Playground

Preview the endpoint before sending a live request

Sample responses, schemas, request previews, and code snippets are visible before sign in. Create an account when you are ready to save an API key and run authenticated requests.

Set up API key Endpoint docs

Endpoint

Choose one catalog endpoint for this request.

1 shown

Group

Method

Auth

Endpoint

GETapiKey3 credits/requestsubstack.userActivityResponseDocSubstack

GET /substack/user/activity

List a Substack user's public activity

API key required. Paste a full key or rotate one from the API Keys page.

Set up API key

View docs

API key

API key required for live requests. Your key is only used to send requests from this Playground.

not configured

Active Playground key: not configured

Manage API keys in Console

Required query parameters

user_id

requiredinteger

Numeric user id from the user endpoint

Add an API key to send a live request.

If an active API key is configured, Copy cURL includes it. Share links never include API keys.

View docs

Sample responseGET

Shown before your first request. Add an API key and send a request to see the live response, status, latency, and headers.

{
  "code": 200,
  "data": {
    "user_id": 49731969,
    "types": [
      "note"
    ],
    "next_cursor": "eyJiZWZvcmVfdGltZXN0YW1wIjoi...",
    "has_more": true,
    "items": [
      {
        "kind": "note",
        "timestamp": "2026-09-02T10:14:33.120Z",
        "note": {
          "id": 321037621,
          "body": "A note the user wrote.",
          "author_handle": "kittyunderhill",
          "url": "https://substack.com/@kittyunderhill/note/c-321037621",
          "reaction_count": 18,
          "is_ai_generated": false
        }
      }
    ]
  },
  "msg": "success"
}

Endpoint details

Method: GET
Path: /substack/user/activity
Authentication: apiKey
Credit cost: 3 credits/request
Platform: Substack
Parameters: 4 documented fields

Request parameters

user_id:querytypes:querycursor:queryx-api-key:header

Response schema fields

Sample response summary

{
  "code": 200,
  "data": {
    "user_id": 49731969,
    "types": [
      "note"
    ],
    "next_cursor": "eyJiZWZvcmVfdGltZXN0YW1wIjoi...",
    "has_more": true,
    "items": [
      {
        "kind": "note",
        "timestamp": "2026-09-02T10:14:33.120Z",
        "note": {
          "id": 321037621,
          "body": "A note the user wrote.",
          "author_handle": "kittyunderhill",
          "url": "https://substack.com/@kittyunderhill/note/c-321037621",
          "reaction_count": 18,
          "is_ai_generated": false
        }
      }
    ]
  },
  "msg": "success"
}

cURL example

curl "https://api.crawlora.net/api/v1/substack/user/activity?user_id=<user_id>" \
  -H "x-api-key: $CRAWLORA_API_KEY"