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[Open the Resonant Frequency Calculator on miniwebtool.com →](https://miniwebtool.com/resonant-frequency-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/resonant-frequency-calculator/run ``` ### Request body Field Type Req. `solve_for` freq | inductance | capacitance `str` — `circuit_type` series | parallel `str` — `inductance` `float | None` — `capacitance` `float | None` — `resistance` `float | None` — `frequency` `float | None` — `l_unit` h | mh | uh | nh `str` — `c_unit` f | mf | uf | nf | pf `str` — `r_unit` ohm | kohm | mohm `str` — `f_unit` hz | khz | mhz | ghz `str` — ### Cost & access - 1 credit per successful call — failed calls refund. - Starts on: Free. - Max payload:`65536`bytes. - Privacy mode:`hash_only` - Available on: free, starter, pro, business, scale ### Response envelope ```text { "request_id": "01K...", "tool": "resonant-frequency-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) solve_for (str) freq inductance capacitance freq | inductance | capacitance circuit_type (str) series parallel series | parallel inductance (float | None) capacitance (float | None) resistance (float | None) frequency (float | None) l_unit (str) h mh uh nh h | mh | uh | nh c_unit (str) f mf uf nf pf f | mf | uf | nf | pf r_unit (str) ohm kohm mohm ohm | kohm | mohm f_unit (str) hz khz mhz ghz hz | khz | mhz | ghz Send request → Response copy body This endpoint starts on Free Your key is valid, but its current plan cannot call`resonant-frequency-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/resonant-frequency-calculator/run \ -H 'Authorization: Bearer mwt_live_YOUR_KEY' \ -H 'Content-Type: application/json' \ -d '{"solve_for":"freq","circuit_type":"series","inductance":100,"capacitance":100,"l_unit":"uh","c_unit":"pf","r_unit":"ohm","f_unit":"mhz"}' ``` copy ```text import requests resp = requests.post( 'https://api.miniwebtool.com/v1/tools/resonant-frequency-calculator/run', headers={'Authorization': 'Bearer mwt_live_YOUR_KEY'}, json={'solve_for': 'freq', 'circuit_type': 'series', 'inductance': 100, 'capacitance': 100, 'l_unit': 'uh', 'c_unit': 'pf', 'r_unit': 'ohm', 'f_unit': 'mhz'}, ) resp.raise_for_status() print(resp.json()) ``` copy ```text const resp = await fetch( 'https://api.miniwebtool.com/v1/tools/resonant-frequency-calculator/run', { method: 'POST', headers: { 'Authorization': 'Bearer mwt_live_YOUR_KEY', 'Content-Type': 'application/json', }, body: JSON.stringify({"solve_for":"freq","circuit_type":"series","inductance":100,"capacitance":100,"l_unit":"uh","c_unit":"pf","r_unit":"ohm","f_unit":"mhz"}), } ); 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([ 'solve_for' => 'freq', 'circuit_type' => 'series', 'inductance' => 100, 'capacitance' => 100, 'l_unit' => 'uh', 'c_unit' => 'pf', 'r_unit' => 'ohm', 'f_unit' => 'mhz' ]), ]); $resp = curl_exec($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/resonant-frequency-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 = { 'solve_for' => 'freq', 'circuit_type' => 'series', 'inductance' => 100, 'capacitance' => 100, 'l_unit' => 'uh', 'c_unit' => 'pf', 'r_unit' => 'ohm', 'f_unit' => 'mhz' }.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{}{ "solve_for": "freq", "circuit_type": "series", "inductance": 100, "capacitance": 100, "l_unit": "uh", "c_unit": "pf", "r_unit": "ohm", "f_unit": "mhz", }) req, _:= http.NewRequest("POST", "https://api.miniwebtool.com/v1/tools/resonant-frequency-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/resonant-frequency-calculator/run")) .header("Authorization", "Bearer mwt_live_YOUR_KEY") .header("Content-Type", "application/json") .POST(HttpRequest.BodyPublishers.ofString("{\"solve_for\":\"freq\",\"circuit_type\":\"series\",\"inductance\":100,\"capacitance\":100,\"l_unit\":\"uh\",\"c_unit\":\"pf\",\"r_unit\":\"ohm\",\"f_unit\":\"mhz\"}")) .build(); var resp = client.send(req, HttpResponse.BodyHandlers.ofString()); System.out.println(resp.body()); ``` how-to call resonant-frequency-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:. See the Request body table above for the full schema. - POST to`https://api.miniwebtool.com/v1/tools/resonant-frequency-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 Resonant Frequency Calculator API do? + Calculate LC/RLC resonant frequency, inductance, capacitance, impedance, Q factor, and bandwidth. Use it to add this utility without rebuilding formulas, validation, examples, and documentation. How much does one call to Resonant Frequency Calculator cost? + 1 credit per successful call. Failed calls (validation errors, 5xx) don't bill. What parameters does the Resonant Frequency Calculator API require? + Required fields: (none). Full schema at /v1/openapi.json. Is the Resonant Frequency 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 Resonant Frequency Calculator API? + Yes. Connect to https://api.miniwebtool.com/v1/mcp over the Model Context Protocol. The agent discovers `resonant-frequency-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 (`resonant-frequency-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=="resonant-frequency-calculator")' ``` see-also related science tools [ psi to kPa Converter Convert pounds per square inch to kilopascals and related pressure units. ](/tools/psi-to-kpa-converter/) [ Bar to PSI Converter Convert bar and PSI, including kPa, MPa, atm, torr, inHg, and Pa. ](/tools/bar-to-psi-converter/) [ 555 Timer Calculator Calculate 555 timer astable frequency, period, duty cycle, or monostable pulse … ](/tools/555-timer-calculator/) [ Astronomical Unit Converter Convert astronomical distances among AU, light-time, parsecs, kilometers, and m… ](/tools/astronomical-unit-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