--- title: "Xiaohongshu (RedNote) Pugongying related keywords API · SocialToAI" canonical: https://socialtoai.com/xiaohongshu-keyword-related-api/ updated: 2026-10-30 --- # Xiaohongshu (RedNote) Pugongying related keywords API Get what people search on Xiaohongshu before and after a keyword, from the platform's creator marketplace, each with its place by relevance, its search index, the notes about it and their reads. A call to the Xiaohongshu (RedNote) Pugongying related keywords API costs 24 credits ($0.048 to $0.08 depending on the pack); failed calls are free. Call it over HTTP or from your AI client over MCP. Last tested 2026-10-31. - Page: https://socialtoai.com/xiaohongshu-keyword-related-api/ - Last updated: 2026-10-30 - Last tested: 2026-10-31 | Request | Price key | Credits | | --- | --- | --- | | `POST /v1/call/xiaohongshu.keyword_related` | `xiaohongshu.keyword_related` | 24 | Daily watch: tell your AI “watch this daily” and this call runs by itself every day, sending only what is new: at most 744 credits a month, about $2.48. [How to set it up](https://socialtoai.com/docs/schedules.md#watch) ## What you get from the Xiaohongshu (RedNote) Pugongying related keywords API A recorded call returned 98 items; here is the first, field by field. Names and text are removed from the sample; the numbers are as recorded. | Field | In the recorded answer | | --- | --- | | title | 烧烤 | | url | null | | rank | 1 | | heat | null | | fields.related_to | 露营 | | fields.relation | prior | | fields.relevance | null: Xiaohongshu cannot give it | | fields.search_index | 2,638,774 | | fields.composite_index | null: Xiaohongshu cannot give it | 24 credits a call (≈ $0.048–$0.08): about 125 calls for $10. ## Xiaohongshu (RedNote) Pugongying related keywords API: request and response ```bash curl https://api.socialtoai.com/v1/call/xiaohongshu.keyword_related \ -H "Authorization: Bearer $SOCIALTOAI_API_KEY" \ -H "Idempotency-Key: $(uuidgen)" \ -H "Content-Type: application/json" \ -d '{ "keyword": "面膜" }' ``` ```python import os import uuid import requests response = requests.post( "https://api.socialtoai.com/v1/call/xiaohongshu.keyword_related", headers={ "Authorization": f"Bearer {os.environ['SOCIALTOAI_API_KEY']}", # A new key for each request; the same one again retries it without paying twice. "Idempotency-Key": str(uuid.uuid4()), }, json={ "keyword": "面膜", }, ) print(response.json()) ``` ## Xiaohongshu (RedNote) Pugongying related keywords API parameters | Name | Type | Required | Default | Description | | --- | --- | --- | --- | --- | | `keyword` | string | Required | — | One keyword | First page only: up to 120 items, with no cursor parameter and no next page. ## Xiaohongshu (RedNote) Pugongying related keywords API response fields | Field | Type | Meaning | Given | | --- | --- | --- | --- | | `items[].title` | string | The entry's title or name. | yes | | `items[].url` | string | A link that opens it; null where the platform's list has none. | yes | | `items[].rank` | integer | Position on a board, from 1. | yes | | `items[].heat` | integer | The platform's heat score. | yes | | `items[].fields.related_to` | string | The keyword you asked about. | yes | | `items[].fields.relation` | string | How it is related: query (searched together with your keyword), posts (appears with it in content), prior (searched before it), after (searched after it), suggestion (offered as your keyword is typed into the search box). | yes | | `items[].fields.relevance` | number | How closely it is related to your keyword, from 0 to 1. | always null: Xiaohongshu does not give it | | `items[].fields.search_index` | integer | The related keyword's search index: the platform's own index, not a count of searches. null where the platform gives no figure for the word. | yes | | `items[].fields.composite_index` | integer | The related keyword's composite index: the platform's own index of how much attention content about it drew, not a count. | always null: Xiaohongshu does not give it | Every item also has platform, id, ref, approx and type; the response around the items is the same on every call. [Response format](https://socialtoai.com/docs/api/response.md) ## Sample response ```json { "request_id": "req_00000000-0000-4000-8000-000000000001", "schema_version": "v1", "fetched_at": "2026-10-12T21:42:15.000Z", "action": "call", "op": "xiaohongshu.keyword_related", "platform": "xiaohongshu", "status": "ok", "items": [ { "platform": "xiaohongshu", "id": "烧烤", "ref": "烧烤", "approx": [], "type": "entry", "entry_type": "keyword_related", "title": "烧烤", "url": null, "rank": 1, "heat": null, "fields": { "related_to": "露营", "relation": "prior", "relevance": null, "search_index": 2638774, "composite_index": null } } ], "unavailable": ["fields.relevance", "fields.composite_index"], "page": { "has_more": false }, "warnings": [], "applied_params": { "keyword": "面膜" }, "cost_credits": 24, "billing": { "cost_credits": 24, "balance_credits": 76, "today_spend_credits": 24, "daily_limit_credits": null, "daily_remaining_credits": null, "display": "This call: 24 credits (≈ $0.08). Balance: 76 credits (≈ $0.25)." }, "replayed": false } ``` ## Xiaohongshu (RedNote) Pugongying related keywords API: paging and billing - One call returns the first page only, up to 120 items, with no cursor, for 24 credits. - A call that runs and finds nothing is a successful call: status is "empty", items is empty, and it costs 24 credits. - On this call Xiaohongshu cannot tell a note that does not exist from one with no data: both come back as empty, and both are charged. - 5 calls per second per key, 20 after a purchase; going over is not charged. [Rate limits](https://socialtoai.com/docs/credits-and-billing.md#rate-limits) - A failed call costs 0 credits and is never retried on its own. [Error codes](https://socialtoai.com/docs/api/errors.md) - “Last tested” above is the last day a real call of this interface succeeded. Each call reads from the platform, and `fetched_at` in the answer is when it was read. The same request sent again with the same key within 5 minutes is a replay (`replayed: true`): 0 credits, and the answer as first read. ## Once connected over MCP, these questions use the Xiaohongshu (RedNote) Pugongying related keywords API - Get what people search on Xiaohongshu before and after a keyword, from the platform's creator marketplace, each with its place by relevance, its search index, the notes about it and their reads: 面膜. → `call {"op":"xiaohongshu.keyword_related","keyword":"面膜"}`, 24 credits ## Give this to your AI ``` Use the SocialToAI MCP server (https://mcp.socialtoai.com/mcp) for this: Get what people search on Xiaohongshu before and after a keyword, from the platform's creator marketplace, each with its place by relevance, its search index, the notes about it and their reads: 面膜. Call the call tool with {"op":"xiaohongshu.keyword_related","keyword":"面膜"}. Needed: keyword. It gives its first page only, up to 120 items, with no next page; each call costs 24 credits. Before you start, work out how many credits it will take in all and ask me; call it only after I agree. If SocialToAI is not connected yet, tell me how to connect it; never ask me to paste a key into the chat. Answer with a link to every item you used, and tell me how many credits it cost. ``` ## The same call on other platforms | Interface | Price key | Credits | | --- | --- | --- | | [Douyin trend-index related keywords API](https://socialtoai.com/douyin-keyword-related-api.md) | `douyin.keyword_related` | 2 | | [WeChat Search suggestions API](https://socialtoai.com/wechat-keyword-related-api.md) | `wechat.keyword_related` | 60 | ## More on Xiaohongshu | Interface | What it does | Price key | Credits | | --- | --- | --- | --- | | [Xiaohongshu (RedNote) topic detail API](https://socialtoai.com/xiaohongshu-topic-api.md) | Get one Xiaohongshu topic by its page ID. | `xiaohongshu.topic` | 12 | | [Xiaohongshu (RedNote) topic notes API](https://socialtoai.com/xiaohongshu-topic-notes-api.md) | Get the trending notes under a Xiaohongshu topic by its page ID. | `xiaohongshu.topic_notes` | 12 | | [Xiaohongshu (RedNote) product search API](https://socialtoai.com/xiaohongshu-product-search-api.md) | Search the products of Xiaohongshu's shop by terms. | `xiaohongshu.product_search` | 12 | | [Xiaohongshu (RedNote) Search API](https://socialtoai.com/xiaohongshu-search-api.md) | Find notes by keyword: text, author, likes, comment count and publish time. | `xiaohongshu.search` | 12 | | [Xiaohongshu (RedNote) product reviews API](https://socialtoai.com/xiaohongshu-product-reviews-api.md) | Get the first page of buyers' reviews of a product of Xiaohongshu's shop by the product's ID. | `xiaohongshu.product_reviews` | 12 | | [Xiaohongshu (RedNote) Detail API](https://socialtoai.com/xiaohongshu-detail-api.md) | One note by ID or link: text, author, likes, comment count and publish time. | `xiaohongshu.detail` | 12 | | [Xiaohongshu (RedNote) User Profile API](https://socialtoai.com/xiaohongshu-user-profile-api.md) | One account: name, bio, followers, following and post count. | `xiaohongshu.user_profile` | 12 | | [Xiaohongshu (RedNote) Pugongying keyword search index API](https://socialtoai.com/xiaohongshu-keyword-history-api.md) | Get a keyword's day-by-day search index on Xiaohongshu over about the last three months, from the platform's creator marketplace, with each day's notes about the keyword and how often they were shown, read and engaged with. | `xiaohongshu.keyword_history` | 24 | | [Xiaohongshu (RedNote) Trending API](https://socialtoai.com/xiaohongshu-trending-api.md) | What is trending now: title, rank and heat. | `xiaohongshu.trending` | 12 | | [Xiaohongshu (RedNote) Comments API](https://socialtoai.com/xiaohongshu-comments-api.md) | The comments under one note: text, likes, reply count and time. | `xiaohongshu.comments` | 12 | ## Read next - [Xiaohongshu official API: access, prices and limits](https://socialtoai.com/does-xiaohongshu-have-an-api.md): What its own API allows, who can use it and what it costs, with sources. - [How to let ChatGPT read Xiaohongshu (RedNote)](https://socialtoai.com/how-to/let-chatgpt-read-xiaohongshu.md): connect ChatGPT to Xiaohongshu notes and comments - [Let Claude Code and Cursor read Xiaohongshu and Douyin, with no QR code or cookie](https://socialtoai.com/how-to/let-claude-code-and-cursor-read-xiaohongshu-and-douyin.md): connect Claude Code and Cursor to Xiaohongshu and Douyin with no QR code or cookie, and what a self-run server costs you - [How brands outside China monitor Xiaohongshu (RedNote), Douyin and Weibo with AI](https://socialtoai.com/how-to/monitor-xiaohongshu-douyin-weibo-from-outside-china.md): monitor Xiaohongshu, Douyin and Weibo from outside China with AI, in English, with original links - [Xiaohongshu (RedNote) MCP server](https://socialtoai.com/mcp/xiaohongshu.md): Let your AI read Xiaohongshu. ## Xiaohongshu (RedNote) Pugongying related keywords API: questions **Do I need a Xiaohongshu account or Xiaohongshu's own API access?** No. You only need a SocialToAI key. The call returns content and account information publicly visible on Xiaohongshu; you never sign in to Xiaohongshu or apply for anything there. **Can I get the next page?** No. On Xiaohongshu this interface gives its first page only (up to 120 items): the response carries no cursor, and page.has_more is always false. **What does one call cost in dollars?** 24 credits: $0.08 at 300 credits per dollar (purchases from $10), $0.048 at 500 per dollar (from $200). Credits never expire and there is no subscription. 100 free credits on sign-up, no card. **Am I charged when a call fails or finds nothing?** A failed call costs 0 credits and is never retried on its own. A call that runs and finds nothing is a successful call: status is "empty" and it costs 24 credits. This interface cannot tell a target that does not exist from one with no data, so both are charged as empty. **How much does one call return?** One call returns the first page only, up to 120 items, with no cursor, for 24 credits. **Is there a rate limit?** 5 calls a second per key, 20 a second after your first purchase. A request over the limit is told how long to wait and is not charged. **How do I use it from Claude, ChatGPT or Cursor?** Yes. In Claude or ChatGPT, add the MCP address https://mcp.socialtoai.com/mcp as a custom connector, sign in with the code we email you and press Allow; there is no key to paste. In Claude Code, run one command, type /mcp, pick socialtoai and sign in; Codex and Cursor sign in too, with their steps on the connect page. Then ask in plain words and your AI calls call for you.