> **For coding agents and LLMs:** This is one page from the Social Fetch docs (markdown export). For curated orientation and workflow guidance, start with [`/llms.txt`](https://www.socialfetch.dev/llms.txt); for agent onboarding and crawl rules, use [`/agents.txt`](https://www.socialfetch.dev/agents.txt); for the full endpoint list with links to pages like this one, use [`/llms-endpoints.txt`](https://www.socialfetch.dev/llms-endpoints.txt); for one platform's parameters and curls, use [`/llms-{platform}.txt`](https://www.socialfetch.dev/llms-tiktok.txt); use [`/llms.json`](https://www.socialfetch.dev/llms.json) when you need structured JSON for tool registration.

## This page

- **On-site (HTML):** <https://www.socialfetch.dev/docs/api/v1/substack/profiles/handle/subscriptions/get>
- **Markdown (.mdx) URL:** <https://www.socialfetch.dev/docs/api/v1/substack/profiles/handle/subscriptions/get.mdx>

## API base URL and authentication

- **API origin (from OpenAPI `servers`):** `https://api.socialfetch.dev`
- **Authentication:** send `x-api-key: sfk_...` on `/v1/**` and `/v2/**` routes unless the operation is explicitly anonymous (check OpenAPI `security`, the [API reference hub](https://www.socialfetch.dev/docs/api.mdx), [`/llms.txt`](https://www.socialfetch.dev/llms.txt), or [`/llms.json`](https://www.socialfetch.dev/llms.json) for each route).
- **OpenAPI JSON:** <https://www.socialfetch.dev/openapi.json>

## Recommended docs entrypoints (this site)

- [Documentation overview](https://www.socialfetch.dev/docs.mdx) — top-level orientation (markdown).
- [Quickstart](https://www.socialfetch.dev/docs/quickstart.mdx) — authenticate with `x-api-key`, validate auth with `whoami`, and understand the JSON envelope.
- [SDK](https://www.socialfetch.dev/docs/sdk.mdx) — official TypeScript SDK guide, including `SocialFetchClient`, `Result`, and `unwrap()`.
- [Capability matrix](https://www.socialfetch.dev/docs/capability-matrix.mdx) — every operation with identifiers, pagination, outcomes, media download, credits, and its SDK method. Generated from OpenAPI, so use it for route selection instead of scanning individual pages.
- [Recipes](https://www.socialfetch.dev/docs/recipes.mdx) — copyable workflows (brand monitoring, transcripts, Ad Library, creator scoring, Reddit research) with credit callouts and SDK examples.
- [Integrations](https://www.socialfetch.dev/docs/integrations.mdx) — MCP for AI clients, n8n verified node, Apify Store Actors, Make custom app, SDK, and REST API connection paths.
- [MCP product page](https://www.socialfetch.dev/mcp) — hosted MCP overview, OAuth, Skills install.
- [MCP integration](https://www.socialfetch.dev/docs/integrations/mcp.mdx) — hosted `/mcp` server, OAuth, Cursor/VS Code/Claude install snippets, 910 endpoint tools, plus docs_search/docs_read for implementation help.
- [n8n integration](https://www.socialfetch.dev/docs/integrations/n8n.mdx) — install `n8n-nodes-socialfetch`, credentials, and workflow examples.
- [Apify integration](https://www.socialfetch.dev/docs/integrations/apify.mdx) — Store Actors under @social-fetch, PPE billing, dataset export, and quick start.
- [Make integration](https://www.socialfetch.dev/docs/integrations/make.mdx) — custom app modules for Make scenarios, API key credentials, and module catalog.
- [`/llms-endpoints.txt`](https://www.socialfetch.dev/llms-endpoints.txt) — every documented operation with a direct link to that route's agent-readable markdown page (prefer this over parsing OpenAPI).
- [`/llms-{platform}.txt`](https://www.socialfetch.dev/llms-tiktok.txt) — per-platform endpoint files generated from OpenAPI (parameters, credits, curls).
- [`/agents.txt`](https://www.socialfetch.dev/agents.txt) — agent crawl/onboarding file with capabilities, auth rules, and allowlist.
- [`/llms.json`](https://www.socialfetch.dev/llms.json) — structured machine-readable operation inventory with parameter names, pagination, outcomes, credits, and SDK mapping.
- [API reference hub](https://www.socialfetch.dev/docs/api.mdx) — human-friendly index of operations with links into generated pages.
- [Errors](https://www.socialfetch.dev/docs/errors.mdx) — shared error envelope and HTTP status guidance.
- [Credits](https://www.socialfetch.dev/docs/credits.mdx) — metering, `402`, and planning batch jobs.
- Outcome semantics such as `found`, `not_found`, and `private` are documented in [Errors](https://www.socialfetch.dev/docs/errors.mdx) and on operation pages when present in the OpenAPI contract.

## Markdown docs convention

- Every docs page has a markdown twin: append **`.mdx`** to the docs pathname (for example `/docs/quickstart` → `/docs/quickstart.mdx`).
- Agents that send `Accept: text/markdown` on `/docs/**` HTML URLs may receive markdown directly (same URL, `Vary: Accept`).
- Published blog posts use the same convention: `/blog/{slug}` → `/blog/{slug}.mdx`, or `Accept: text/markdown` on the HTML URL (`Vary: Accept`).

---
# List Substack profile subscriptions (https://www.socialfetch.dev/docs/api/v1/substack/profiles/handle/subscriptions/get)

## Summary

List the publications a Substack reader shows publicly.

**Tags:** `Substack`

## HTTP

- **Method:** GET
- **Path:** `/v1/substack/profiles/{handle}/subscriptions`
- **Base URL:** `https://api.socialfetch.dev`

## Capability summary

- **SDK mapping:** `client.substack.listProfileSubscriptions({ handle: "dieworkwear" })`
- **Accepted identifiers:** `handle` (path)
- **Pagination:** cursor via `cursor`, next cursor: `data.page.nextCursor`, has more: `data.page.hasMore`
- **Business outcome field:** `data.lookupStatus` with values `found`, `not_found`

## Credits

- **Base:** 1 credit per successful lookup.
- **Maximum on success (200):** 1 credit.
- **Failed requests (`lookup_failed`, `503`):** not charged.
- **Authoritative field:** `meta.creditsCharged`.

## Authentication

- **`x-api-key`**: API key (`sfk_...`)

## Parameters

### `handle` (path)

- **Required:** yes
- **Constraints:** type `string`; minLength: 1; maxLength: 100; pattern: `^@?[A-Za-z0-9][A-Za-z0-9._-]*$`
- **Description:** A profile handle, e.g. `dieworkwear` or `@dieworkwear`.

### `cursor` (query)

- **Required:** no
- **Constraints:** type `string`; maxLength: 4096
- **Description:** Opaque cursor from the previous page's `nextCursor`.

## Pagination

This endpoint uses **cursor-based pagination** via the `cursor` query parameter.

- Read **hasMore** from `data.page.hasMore`.
- When that value is `true`, read **nextCursor** from `data.page.nextCursor` and pass it as the `cursor` query parameter on the **next** request (URL-encode when building a query string).
- Omit `cursor` on the **first** request.
- Stop when **hasMore** is `false` or **nextCursor** is null (end of list).

## Responses (status codes)

- **200**: Substack subscriptions.
- **400**: Invalid request
- **401**: Missing or invalid API key
- **402**: Insufficient credits
- **500**: Unexpected or billing error
- **502**: Lookup could not be completed.
- **503**: Service temporarily unavailable; safe to retry with backoff.

## Response body (200)

Substack subscriptions.

### Field outline

- **data** (required) — type `object`. Endpoint-specific response payload.
  - **lookupStatus** (required) — type `string`; enum: found, not_found. Whether the profile was found.
  - **profileId** (required) — type `integer`; nullable. Numeric profile id.
  - **subscriptions** (required) — type `array`. Publications the person shows publicly.
    - _items:_
      - **id** (required) — type `integer`; nullable. Numeric subscription id.
      - **visibility** (required) — type `string`; nullable. Who can see the subscription.
      - **membershipState** (required) — type `string`; nullable. The person's membership state.
      - **type** (required) — type `string`; nullable. The subscription type.
      - **isFounding** (required) — type `boolean`; nullable. Whether this is a founding membership.
      - **publication** (required) — type `object`. A Substack publication.
  - **total** (required) — type `integer`; minimum: 0; nullable. The total, when Substack publishes one.
  - **page** (required) — type `object`. Pagination state for the current page.
    - **hasMore** (required) — type `boolean`. Whether another page is available.
    - **nextCursor** (required) — type `string`; nullable. Cursor to pass in the next request when more pages exist; null on the last page.
- **meta** (required) — type `object`. Metadata describing the request and billing outcome.
  - **requestId** (required) — type `string`; minLength: 1. Unique request identifier for tracing this API call.
  - **creditsCharged** (required) — type `integer`; minimum: 0. Credits charged for this request.
  - **version** (required) — type `string`; enum: v1. Public API version that served the response.

### Example JSON (found)

```json
{
  "data": {
    "lookupStatus": "found",
    "profileId": 5532139,
    "subscriptions": [
      {
        "id": null,
        "visibility": null,
        "membershipState": null,
        "type": null,
        "isFounding": null,
        "publication": {
          "id": 1038545,
          "name": "Articles Of Interest",
          "subdomain": "articlesofinterest",
          "customDomain": null,
          "apexDomain": null,
          "url": "https://articlesofinterest.substack.com",
          "host": "articlesofinterest.substack.com",
          "description": "A show about what we wear",
          "language": null,
          "kind": null,
          "createdAt": "2022-08-11T17:47:12.974Z",
          "firstPostAt": null,
          "hasPosts": null,
          "isExplicit": false,
          "isInviteOnly": false,
          "isFlagged": null,
          "noIndex": null,
          "isOnSubstack": null,
          "commentsEnabled": true,
          "notesEnabled": null,
          "defaultCommentSort": null,
          "annualDisabled": null,
          "monthlyDisabled": null,
          "paymentsState": "enabled",
          "freeTrialEnabled": null,
          "pausedUntil": null,
          "emailBannerUrl": null,
          "copyright": "Avery Trufelman",
          "logoUrl": "https://substack-post-media.s3.amazonaws.com/public/images/8c1172f5-cc07-4f22-9822-f4b8ac5bf43b_1280x1280.png",
          "wideLogoUrl": null,
          "coverImageUrl": null,
          "foundingPlanName": null,
          "hasRecommendations": null,
          "benefits": {
            "free": [],
            "paid": [],
            "founding": []
          },
          "author": {
            "id": 1518975,
            "name": "Articles Of Interest",
            "handle": "articlesofinterest",
            "slug": "articlesofinterest",
            "bio": null,
            "photoUrl": "https://substackcdn.com/image/fetch/$s_!RBJM!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F818dc911-f7ff-4d61-892e-325f50df0b22_3000x3000.jpeg",
            "badge": null,
            "badges": null,
            "bestsellerTier": null,
            "primaryPublication": null
          },
          "audience": {
            "paidLabel": null,
            "paidOrderOfMagnitude": null,
            "totalLabel": null,
            "totalOrderOfMagnitude": null,
            "freeLabel": null,
            "freeShort": null,
            "chatMembersLabel": null
          },
          "contributors": [],
          "sections": [],
          "links": [],
          "plans": [],
          "podcast": {
            "exists": null,
            "hasFreeEpisodes": null,
            "hasPaidEpisodes": null,
            "artUrl": null,
            "byline": null,
            "description": null,
            "feedUrl": null,
            "title": null,
            "paidEpisodeArtUrl": null
          }
        }
      }
    ],
    "total": 1,
    "page": {
      "hasMore": false,
      "nextCursor": null
    }
  },
  "meta": {
    "requestId": "req_f8e8c436-f261-4fcc-af14-b4b2b5bc8f92",
    "creditsCharged": 1,
    "version": "v1"
  }
}
```

### Machine-readable error codes

When an error JSON body is returned, it may include one of these `error.code` values (derived from the OpenAPI schemas for this operation; additional codes may exist at runtime):

- `bad_request`

## Error handling & retries

Interpret HTTP status codes using the descriptions below. Do not assume a JSON body unless the OpenAPI schema defines one for that status.

- **400**: Invalid request **Retry:** Fix the request; retrying the same invalid payload will not help.
- **401**: Missing or invalid API key **Retry:** Fix the API key first; retrying without changes will not help.
- **402**: Insufficient credits **Retry:** Do not retry without resolving billing/credits (retrying the same request will not help).
- **500**: Unexpected or billing error
- **502**: Lookup could not be completed. **Retry:** May be transient; a few retries with backoff are reasonable.
- **503**: Service temporarily unavailable; safe to retry with backoff. **Retry:** Usually safe to retry with exponential backoff and jitter.

### Suggested client defaults

- Send the API key using the `x-api-key` header on every request.
- On `503` (and sometimes `502`), retry with backoff; cap retries and surface a clear error to the user.
- On `402`, surface an actionable billing message rather than blind retries.

## Examples

### TypeScript SDK

```typescript
import { SocialFetchClient } from "@socialfetch/sdk";

const client = new SocialFetchClient({
  apiKey: process.env.SOCIALFETCH_API_KEY!,
});

const result = await client.substack.listProfileSubscriptions({
  handle: "dieworkwear",
});

if (!result.ok) {
  console.error(result.error);
} else {
  console.log(result.value.data);
}
```

### Node.js

```javascript
const response = await fetch(
  "https://api.socialfetch.dev/v1/substack/profiles/dieworkwear/subscriptions",
  {
    headers: {
      "x-api-key": "YOUR_API_KEY"
    }
  }
);

const data = await response.json();
console.log(data);
```

### cURL

```bash
curl "https://api.socialfetch.dev/v1/substack/profiles/dieworkwear/subscriptions" \
  -H "x-api-key: YOUR_API_KEY"
```

### Python

```python
import requests

response = requests.get(
    "https://api.socialfetch.dev/v1/substack/profiles/dieworkwear/subscriptions",
    headers={"x-api-key": "YOUR_API_KEY"},
)
data = response.json()
print(data)
```

### Example: next page (pagination)

After a successful response, if pagination is not finished, request the next page using `cursor` (URL-encode when composing the query string):

```javascript
const previous = await response.json();
const nextCursor = previous?.data?.page?.nextCursor;
const hasMore = previous?.data?.page?.hasMore;
if (!hasMore || nextCursor == null) {
  // no more pages
} else {
  const nextUrl = new URL("https://api.socialfetch.dev/v1/substack/profiles/charlidamelio/subscriptions");
  nextUrl.searchParams.set("cursor", nextCursor);
  // optionally preserve sort: nextUrl.searchParams.set("sortBy", "latest");
  const nextResponse = await fetch(nextUrl.toString(), {
    headers: { "x-api-key": "YOUR_API_KEY" },
  });
  const nextData = await nextResponse.json();
}
```