> **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):** - **Markdown (.mdx) URL:** ## 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:** ## 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`). --- # Get Wikipedia on-this-day entries (https://www.socialfetch.dev/docs/api/v1/wikipedia/on-this-day/get) ## Summary Get selected Wikipedia anniversaries, births, deaths, events or holidays for a month and day. **Tags:** `Wikipedia` ## HTTP - **Method:** GET - **Path:** `/v1/wikipedia/on-this-day` - **Base URL:** `https://api.socialfetch.dev` ## Capability summary - **SDK mapping:** `client.wikipedia.listOnThisDay({ month: 11, day: 2 })` - **Pagination:** none - **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 ### `lang` (query) - **Required:** no - **Constraints:** type `string`; default: `en` - **Description:** Wikimedia edition code, e.g. `en`, `de`, `ja`, `simple` or `zh-min-nan`. Default: `en`. ### `month` (query) - **Required:** yes - **Constraints:** type `integer`; minimum: 1; maximum: 12 - **Description:** Month, 1 to 12. ### `day` (query) - **Required:** yes - **Constraints:** type `integer`; minimum: 1; maximum: 31 - **Description:** Day of the month, 1 to 31. ### `type` (query) - **Required:** no - **Constraints:** type `string`; enum: selected, births, deaths, events, holidays, all; default: `all` - **Description:** `selected`, `births`, `deaths`, `events`, `holidays` or `all` (default). Each type can be several MB, and `all` returns every type at once. ## Responses (status codes) - **200**: Get Wikipedia on-this-day entries - **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) Get Wikipedia on-this-day entries ### Field outline - **data** (required) — type `object`. Endpoint-specific response payload. - **lookupStatus** (required) — type `string`; enum: found, not_found. Whether the entity, page or data set exists. A missing entity is `not_found`; an existing entity with no rows is `found` with `empty: true`. - **lang** (required) — type `string`. Edition code. - **month** (required) — type `integer`. Month. - **day** (required) — type `integer`. Day. - **type** (required) — type `string`; enum: selected, births, deaths, events, holidays, all. Which entries were requested. - **selected** (required) — type `array`; nullable. Selected anniversaries, when requested. - _items:_ - **text** (required) — type `string`. The event, birth, death, holiday or news text. - **year** (required) — type `integer`; nullable. Year, when the entry has one. - **pages** (required) — type `array`. Linked pages. - _items:_ - **births** (required) — type `array`; nullable. Births, when requested. - _items:_ - **text** (required) — type `string`. The event, birth, death, holiday or news text. - **year** (required) — type `integer`; nullable. Year, when the entry has one. - **pages** (required) — type `array`. Linked pages. - _items:_ - **deaths** (required) — type `array`; nullable. Deaths, when requested. - _items:_ - **text** (required) — type `string`. The event, birth, death, holiday or news text. - **year** (required) — type `integer`; nullable. Year, when the entry has one. - **pages** (required) — type `array`. Linked pages. - _items:_ - **events** (required) — type `array`; nullable. Events, when requested. - _items:_ - **text** (required) — type `string`. The event, birth, death, holiday or news text. - **year** (required) — type `integer`; nullable. Year, when the entry has one. - **pages** (required) — type `array`. Linked pages. - _items:_ - **holidays** (required) — type `array`; nullable. Holidays, when requested. - _items:_ - **text** (required) — type `string`. The event, birth, death, holiday or news text. - **year** (required) — type `integer`; nullable. Year, when the entry has one. - **pages** (required) — type `array`. Linked pages. - _items:_ - **empty** (required) — type `boolean`. Whether the answer is a valid empty result rather than missing. - **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", "lang": "en", "month": 11, "day": 2, "type": "events", "selected": null, "births": null, "deaths": null, "events": [ { "text": "A peace agreement is signed between the Ethiopian government and the Tigray People's Liberation Front, ending the Tigra…", "year": 2022, "pages": [ { "type": "standard", "title": "Ethiopia–Tigray_peace_agreement", "displayTitle": "Ethiopia–Tigray peace agreement", "namespace": { "id": 0, "text": "" }, "wikibaseItem": "Q115124248", "titles": { "canonical": "Ethiopia–Tigray_peace_agreement", "normalized": "Ethiopia–Tigray peace agreement", "display": "Ethiopia–Tigray peace agreement" }, "pageId": 72171064, "thumbnail": { "source": "https://thumb.wikimedia.org/wikipedia/commons/thumb/e/e7/Delegation_from_the_African_Union_%28AU%29_and_other_partners_…", "width": 330, "height": 181 }, "originalImage": { "source": "https://upload.wikimedia.org/wikipedia/commons/e/e7/Delegation_from_the_African_Union_%28AU%29_and_other_partners_has_a…", "width": 1023, "height": 560 }, "lang": "en", "dir": "ltr", "revision": "1380228157", "tid": "771a2714-c7e0-11f1-a557-0486087b62c1", "timestamp": "2026-10-14T15:03:51Z", "description": "Peace treaty signed in 2022", "descriptionSource": "local", "contentUrls": { "desktop": { "page": "https://en.wikipedia.org/wiki/Ethiopia%E2%80%93Tigray_peace_agreement", "revisions": "https://en.wikipedia.org/wiki/Ethiopia%E2%80%93Tigray_peace_agreement?action=history", "edit": "https://en.wikipedia.org/wiki/Ethiopia%E2%80%93Tigray_peace_agreement?action=edit", "talk": "https://en.wikipedia.org/wiki/Talk:Ethiopia%E2%80%93Tigray_peace_agreement" }, "mobile": { "page": "https://en.wikipedia.org/wiki/Ethiopia%E2%80%93Tigray_peace_agreement", "revisions": "https://en.wikipedia.org/wiki/Special:History/Ethiopia%E2%80%93Tigray_peace_agreement", "edit": "https://en.wikipedia.org/wiki/Ethiopia%E2%80%93Tigray_peace_agreement?action=edit", "talk": "https://en.wikipedia.org/wiki/Talk:Ethiopia%E2%80%93Tigray_peace_agreement" } }, "extract": "The Ethiopia–Tigray peace agreement, also called the Pretoria Agreement or the Cessation of Hostilities Agreement (CoHA…", "extractHtml": "

The Ethiopia–Tigray peace agreement, also called the Pretoria Agreement or the Cessation of Hostili…", "normalizedTitle": "Ethiopia–Tigray peace agreement" } ] } ], "holidays": null, "empty": false }, "meta": { "requestId": "req_aa156ef1-3a57-4d96-b2be-d714682f2054", "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.wikipedia.listOnThisDay({ month: 11, day: 2, }); 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/wikipedia/on-this-day?month=11&day=2", { headers: { "x-api-key": "YOUR_API_KEY" } } ); const data = await response.json(); console.log(data); ``` ### cURL ```bash curl "https://api.socialfetch.dev/v1/wikipedia/on-this-day?month=11&day=2" \ -H "x-api-key: YOUR_API_KEY" ``` ### Python ```python import requests response = requests.get( "https://api.socialfetch.dev/v1/wikipedia/on-this-day?month=11&day=2", headers={"x-api-key": "YOUR_API_KEY"}, ) data = response.json() print(data) ```