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POST/v1/call/xiaohongshu.keyword_history

Xiaohongshu (RedNote) Pugongying keyword search index API

Only on Xiaohongshu.

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. A call to the Xiaohongshu (RedNote) Pugongying keyword search index 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.

Start for freeSign in to run
100 credits on sign-up, no card needed
24 creditsper call, ≈ $0.048–$0.08
One objectreturned per call
1.8 KBsample response, 1 item

Last updated:

What you get from the Xiaohongshu (RedNote) Pugongying keyword search index API.
From a recorded answer.

A recorded call returned the object below, field by field. Names and text are removed from the sample; the numbers are as recorded.

Lighter for your AI: the same recorded data (1 item) is about 11,622 tokens as the platform's raw JSON and about 5,113 as this interface returns it, 56% fewer (measured 2026-11-06). How it was measured

FieldIn the recorded answer
title露营
urlnull
ranknull
heatnull
fields.points7 entries

24 credits a call (≈ $0.048–$0.08): about 125 calls for $10.

Xiaohongshu (RedNote) Pugongying keyword search index API: request and response

curl https://api.socialtoai.com/v1/call/xiaohongshu.keyword_history \  -H "Authorization: Bearer $SOCIALTOAI_API_KEY" \  -H "Idempotency-Key: $(uuidgen)" \  -H "Content-Type: application/json" \  -d '{    "keyword": "面膜"  }'
import osimport uuidimport requestsresponse = requests.post(    "https://api.socialtoai.com/v1/call/xiaohongshu.keyword_history",    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())
# Connected over MCP? Ask in plain words.Use the Xiaohongshu PGY keyword search index interface (xiaohongshu.keyword_history) with keyword: 面膜.# Your AI calls the call tool with:{  "keyword": "面膜"}
Sign in to run24 creditsOpens in the Playground with these parameters after you sign in. It never runs by itself.
200 OK1.8 KB24 credits
{  "op": "xiaohongshu.keyword_history",  "platform": "xiaohongshu",  "status": "ok",  "items": [    {      "platform": "xiaohongshu",      "id": "露营",      "ref": "露营",      "approx": [],      "type": "entry",      "entry_type": "keyword_history",      "title": "露营",      "url": null,      "rank": null,      "heat": null,      "fields": {        "points": [          {            "date": "2026-07-13T00:00:00Z",            "search_index": 8876,            "composite_index": null,            "notes": 33361,            "impressions": 25229649,            "views": 4523846,            "engagements": 188216          },          {            "date": "2026-07-14T00:00:00Z",            "search_index": 8762,            "composite_index": null,            "notes": 33750,            "impressions": 24457001,            "views": 4743520,            "engagements": 197829          },          {            "date": "2026-07-15T00:00:00Z",            "search_index": 9077,            "composite_index": null,            "notes": 33603,            "impressions": 24578646,            "views": 4554487,            "engagements": 210434          },          {            "date": "2026-07-16T00:00:00Z",            "search_index": 9328,            "composite_index": null,            "notes": 34232,            "impressions": 28302245,            "views": 4819305,            "engagements": 220431          },          {            "date": "2026-07-17T00:00:00Z",            "search_index": 11233,            "composite_index": null,            "notes": 34532,            "impressions": 32434694,            "views": 5831644,            "engagements": 278646          },          {            "date": "2026-07-18T00:00:00Z",            "search_index": 12636,            "composite_index": null,            "notes": 34772,            "impressions": 35466179,            "views": 6122704,            "engagements": 279193          },          {            "date": "2026-07-19T00:00:00Z",            "search_index": 11490,            "composite_index": null,            "notes": 35368,            "impressions": 37495492,            "views": 8187198,            "engagements": 302141          }        ]      }    }  ],  "unavailable": ["fields.points.composite_index"],  "cost_credits": 24}
entry_type
keyword_history

Names and text were removed from the sample; the numbers are as recorded.

Sample dataFull response

Xiaohongshu (RedNote) Pugongying keyword search index API parameters.
1 parameter, all required.

Send them as a JSON body with POST. Your key goes in the Authorization header, never in the URL.

NameTypeRequiredDefaultDescription
keywordstringRequired—One keyword

Xiaohongshu (RedNote) Pugongying keyword search index API response fields.
What Xiaohongshu cannot give is marked.

FieldTypeMeaning
items[].titlestringThe entry's title or name.
items[].urlstringA link that opens it; null where the platform's list has none.
items[].rankintegerPosition on a board, from 1.
items[].heatintegerThe platform's heat score.
items[].fields.pointsarrayOne entry per day, oldest first: date, search_index, composite_index, notes, impressions, views, engagements.composite_index: always null here
nullFields Xiaohongshu cannot give

Read null as “Xiaohongshu did not give this”, not as zero. These are always null on this call:

  • fields.points.composite_indexOne entry per day, oldest first: date, search_index, composite_index, notes, impressions, views, engagements.

Every item also has platform, id, ref, approx and type; the response around the items is the same on every call. Response format

Xiaohongshu (RedNote) Pugongying keyword search index API: paging and billing.

One call returns one object, with no pages, for 24 credits.

5 calls per second per key, 20 after a purchase; going over is not charged. Rate limits

A failed call costs 0 credits and is never retried on its own. Error codes

Interface last tested: 2026-10-30. 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 keyword search index API.

  1. 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: 面膜.
    call {"op":"xiaohongshu.keyword_history","keyword":"面膜"}
    24 credits

Give this to your AI.
Copy it into Claude or ChatGPT.

How to connect
Prompt
Use the SocialToAI MCP server (https://mcp.socialtoai.com/mcp) for this: 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: 面膜.Call the call tool with {"op":"xiaohongshu.keyword_history","keyword":"面膜"}. Needed: keyword.For several, call it once for each: 24 credits each.Before you start, work out how many credits it will take in all and ask me; call it only after I agree.What usually comes next, with the ref or username it returns: call xiaohongshu.keyword_related (PGY related keywords).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.

Paste it into a chat once SocialToAI is connected over MCP. There is no key in it: Claude and ChatGPT sign in, other clients send a key in a header.

The interface of the same name on other platforms.

All platforms and prices
POST/v1/call/xiaohongshu.keyword_history{ "keyword": "面膜" }24 creditsper call
Douyin trend-index keyword trends API4 credits
WeChat Index API60 credits
Change the op in the path. The response around the items keeps the same shape.

Read next.

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monitor Xiaohongshu, Douyin and Weibo from outside China with AI, in English, with original links

Xiaohongshu (RedNote) MCP server

Let your AI read Xiaohongshu.

Xiaohongshu (RedNote) Pugongying keyword search index API: questions.
Short answers.

All Xiaohongshu data APIs
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.
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.
How much does one call return?
One call returns one object, with no pages, 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.
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