> For the complete documentation index, see [llms.txt](/llms.txt). [miniwebtool /api](/) [tools](/tools/) [docs](/docs/) [reference](/v1/docs) [pricing](/#pricing) [log in](/dashboard/login/) [get free key →](/billing/checkout/?plan=free) - [~](/) - / - [tools](/tools/) - / - [math](/tools/#math) - / - Sample Variance Calculator API # Sample Variance Calculator API math 1 credit / call v2026-04-22 Calculate sample or population variance from a numeric dataset. One POST adds Sample Variance Calculator to your app, site, workflow, or agent — formula, validation, edge cases, and docs already handled. prefer a UI? [Open the Sample Variance Calculator on miniwebtool.com →](https://miniwebtool.com/sample-variance-calculator/) [Start free — get a key →](/billing/checkout/?plan=free) 1,000 credits · no card · 30 seconds ### Endpoint POST · 1cr ```text POST https://api.miniwebtool.com/v1/tools/sample-variance-calculator/run ``` ### Request body Field Type Req. `data` `str` ✓ `variance_type` sample | population `str` — `precision` `int` — ### Cost & access - 1 credit per successful call — failed calls refund. - Starts on: Free. - Max payload:`65536`bytes. - Privacy mode:`no_body_logs` - Available on: free, starter, pro, business, scale ### Response envelope ```text { "request_id": "01K...", "tool": "sample-variance-calculator", "tool_version": "2026-04-22", "credits_used": 1, "result": {... } } ``` ### Try it API key * Stored only in this browser tab. Playground test key is prefilled and only works on this page. [Get a live key →](/billing/checkout/?plan=free) data (str) * 10, 20, 30, 40, 50 variance_type (str) sample population sample | population precision (int) Send request → Response copy body This endpoint starts on Free Your key is valid, but its current plan cannot call`sample-variance-calculator`. Upgrade to Free or higher to run this tool. [Start Free →](/billing/checkout/?plan=free) [Compare plans](/#pricing) ```text ``` Response headers ```text ``` ### Code examples cURL Python JavaScript PHP Ruby Go Java copy ```text curl -X POST https://api.miniwebtool.com/v1/tools/sample-variance-calculator/run \ -H 'Authorization: Bearer mwt_live_YOUR_KEY' \ -H 'Content-Type: application/json' \ -d '{"data":"10, 20, 30, 40, 50","variance_type":"sample","precision":6}' ``` copy ```text import requests resp = requests.post( 'https://api.miniwebtool.com/v1/tools/sample-variance-calculator/run', headers={'Authorization': 'Bearer mwt_live_YOUR_KEY'}, json={'data': '10, 20, 30, 40, 50', 'variance_type': 'sample', 'precision': 6}, ) resp.raise_for_status() print(resp.json()) ``` copy ```text const resp = await fetch( 'https://api.miniwebtool.com/v1/tools/sample-variance-calculator/run', { method: 'POST', headers: { 'Authorization': 'Bearer mwt_live_YOUR_KEY', 'Content-Type': 'application/json', }, body: JSON.stringify({"data":"10, 20, 30, 40, 50","variance_type":"sample","precision":6}), } ); const data = await resp.json(); console.log(data); ``` copy ```text true, CURLOPT_RETURNTRANSFER => true, CURLOPT_HTTPHEADER => [ 'Authorization: Bearer mwt_live_YOUR_KEY', 'Content-Type: application/json', ], CURLOPT_POSTFIELDS => json_encode([ 'data' => '10, 20, 30, 40, 50', 'variance_type' => 'sample', 'precision' => 6 ]), ]); $resp = curl_exec($ch); curl_close($ch); print_r(json_decode($resp, true)); ``` copy ```text require 'net/http' require 'json' require 'uri' uri = URI('https://api.miniwebtool.com/v1/tools/sample-variance-calculator/run') http = Net::HTTP.new(uri.host, uri.port) http.use_ssl = (uri.scheme == 'https') req = Net::HTTP::Post.new(uri) req['Authorization'] = 'Bearer mwt_live_YOUR_KEY' req['Content-Type'] = 'application/json' req.body = { 'data' => '10, 20, 30, 40, 50', 'variance_type' => 'sample', 'precision' => 6 }.to_json resp = http.request(req) puts JSON.parse(resp.body).inspect ``` copy ```text package main import ( "bytes" "encoding/json" "fmt" "io" "net/http" ) func main() { body, _:= json.Marshal(map[string]interface{}{ "data": "10, 20, 30, 40, 50", "variance_type": "sample", "precision": 6, }) req, _:= http.NewRequest("POST", "https://api.miniwebtool.com/v1/tools/sample-variance-calculator/run", bytes.NewReader(body)) req.Header.Set("Authorization", "Bearer mwt_live_YOUR_KEY") req.Header.Set("Content-Type", "application/json") resp, err:= http.DefaultClient.Do(req) if err!= nil { panic(err) } defer resp.Body.Close() out, _:= io.ReadAll(resp.Body) fmt.Println(string(out)) } ``` copy ```text import java.net.URI; import java.net.http.*; var client = HttpClient.newHttpClient(); var req = HttpRequest.newBuilder() .uri(URI.create("https://api.miniwebtool.com/v1/tools/sample-variance-calculator/run")) .header("Authorization", "Bearer mwt_live_YOUR_KEY") .header("Content-Type", "application/json") .POST(HttpRequest.BodyPublishers.ofString("{\"data\":\"10, 20, 30, 40, 50\",\"variance_type\":\"sample\",\"precision\":6}")) .build(); var resp = client.send(req, HttpResponse.BodyHandlers.ofString()); System.out.println(resp.body()); ``` how-to call sample-variance-calculator - Get an API key [Get an API key](/billing/checkout/?plan=free). Sign up free for a bearer token. 1,000 credits/month, no card. - Assemble the JSON body Required fields:`data`,. See the Request body table above for the full schema. - POST to`https://api.miniwebtool.com/v1/tools/sample-variance-calculator/run` Headers:`Authorization: Bearer `and`Content-Type: application/json`. Copy-paste snippets in 7 languages are under Code examples. - Parse the response Envelope:`{request_id, tool, tool_version, credits_used, result}`. The typed output lives in`result`. faq frequently asked What does the Sample Variance Calculator API do? + Calculate sample or population variance from a numeric dataset. Use it to add this utility without rebuilding formulas, validation, examples, and documentation. How much does one call to Sample Variance Calculator cost? + 1 credit per successful call. Failed calls (validation errors, 5xx) don't bill. What parameters does the Sample Variance Calculator API require? + Required fields: data. Full schema at /v1/openapi.json. Is the Sample Variance Calculator API deterministic? + Yes — same input, same output, forever. Tool version 2026-04-22; output shape is stable within a major version. Can an AI agent call the Sample Variance Calculator API? + Yes. Connect to https://api.miniwebtool.com/v1/mcp over the Model Context Protocol. The agent discovers `sample-variance-calculator` with its JSON Schema automatically, so the model can plan while MiniWebtool handles the exact tool result. What format does the API return? + JSON with a stable envelope: `{request_id, tool, tool_version, credits_used, result}`. Errors are RFC 7807 `application/problem+json`. mcp use from an AI agent Every endpoint on this site is also exposed via the [Model Context Protocol](/docs/#mcp) at`https://api.miniwebtool.com/v1/mcp`. Claude, Cursor, and any MCP-capable agent can discover this tool (`sample-variance-calculator`) and its JSON Schema automatically — no client codegen. ```text # List tools the agent can call curl -s https://api.miniwebtool.com/v1/mcp \ -H 'Content-Type: application/json' \ -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' \ | jq '.result.tools[] | select(.name=="sample-variance-calculator")' ``` see-also related math tools [ Grams to Ounces Converter Convert grams to ounces, pounds, kilograms, and milligrams. ](/tools/grams-to-ounces-converter/) [ Ounce to Gram Converter Convert ounces to grams, kilograms, milligrams, and pounds. ](/tools/ounce-to-gram-converter/) [ Square Feet to Acres Converter Convert square feet to acres and related land-area units. ](/tools/square-feet-to-acres-converter/) [ Square Miles to Acres Converter Convert square miles to acres and related land-area units. ](/tools/square-miles-to-acres-converter/) API OPERATIONAL v1 · OpenAPI 3.1 · MCP 2025-06-18 [terms](https://miniwebtool.com/about/terms-and-disclaimer/#api-terms) [privacy](https://miniwebtool.com/about/privacy/#api-privacy) [llms.txt](/llms.txt) [consumer site →](https://miniwebtool.com) © 2026 miniwebtool