URL Encoder/Decoder API

POST

Make special characters safe for query parameters and links.

URL Encoder/Decoder converts text into percent-encoded strings or decodes existing URL components back into plain text. Pass any string with an encode or decode action to receive the processed output and your original text.

Try it — live request, no key required

Request

POSTapi.apiverve.com/v1/urlencode

Body

textstring

Verification

Format

No key required to try it. Get a key to use it in your app.

Example

{
  "status": "ok",
  "error": null,
  "data": {
    "action": "encode",
    "original": "Hello World & Goodbye",
    "encoded": "Hello%20World%20%26%20Goodbye",
    "length": 29
  }
}

About the URL Encoder/Decoder API

URL Encoder/Decoder works by converting special characters and spaces into percent-encoded format (%XX) for safe URL transmission or decoding percent-encoded strings back to original text. Essential for query parameters and URL construction.

What people use it for

API Requests: Encode query parameters and URL components before making API requests to ensure proper formatting
Link Generation: Generate properly encoded URLs for links, redirects, and sharing with special characters or spaces
Form Handling: Encode form data for URL submission or decode URL-encoded form data received from submissions
Search Queries: Encode search terms and filters for URL-based search functionality and bookmarkable search results

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON: Default REST response
XML: Markup format
YAML: Human-readable
CSV: Tabular export
GraphQL: Query language
MCP: For AI agents

View all integrations →

Other ways to use URL Encoder/Decoder

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets

Questions.

Common questions about the URL Encoder/Decoder API.

Read the docs →

Does the API convert spaces and special characters into standard percent encoding?

Yes. It converts special characters and spaces into standard percent-encoded format (%XX) for safe URL transmission. This keeps web addresses valid when sending user input or custom values across HTTP requests.

Can I decode percent-encoded strings back into readable text?

Yes. The decoding endpoint takes percent-encoded strings and reverses them back to their original text and spaces. You can use it to parse incoming query parameters or reconstruct original inputs.

Which plan fits 50,000 URL encodings a month?

The Starter plan easily covers that volume. Each request costs 2 credits, so 50,000 calls use 100,000 credits, exactly half of Starter's monthly credit limit. That works out to about $0.0003 per call or $0.30 per 1,000 calls, while the Free plan includes 100 calls each month.

Is the character length of the result included on the Free plan?

No. The total character length of the output is a premium field reserved for paid plans. Free plan users receive the original text, the resulting encoded or decoded string, and the action performed, while upgrading to Starter or above adds the length metric.

Can this handle strings intended for search queries and form data?

Yes. You can pass raw strings from search boxes, form handling routines, or link builders to sanitize parameters before dispatching requests. It ensures any reserved or non-alphanumeric characters travel without breaking your URLs.

Request parameters — POST /v1/urlencode

Sent as JSON in the request body. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

Parameter	Type	Example	Description
`text`Required	string	`Hello World!`	The text to encode

Optional

Parameter	Type	Example	Description
`action`Optional	string	`encode`	The action to perform `encodedecode` default encode

Example request

curl -X POST "https://api.apiverve.com/v1/urlencode" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"Hello World & Goodbye","action":"encode"}'

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Header	When	Value
`x-api-key`Required	Every request	Your API key. Header names are case-insensitive, so `X-API-Key` is the same header.
`Authorization`Alternate	Instead of the above	`Bearer <key>` — for clients that only expose bearer auth. Resolves to the same account and the same billing.
`content-type`Required	POST body	`application/json`

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Response — POST /v1/urlencode

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "action": "encode",
    "original": "Hello World & Goodbye",
    "encoded": "Hello%20World%20%26%20Goodbye",
    "length": 29
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`action`	string	`"encode"`	The encoding or decoding action that was performed
`original`	string	`"Hello World & Goodbye"`	The original text input before encoding or decoding
`encoded`	string	`"Hello%20World%20%26%20Goodbye"`	The resulting encoded or decoded text output
`length`Premium	number	`29`	The total character length of the encoded or decoded output

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Header	What it carries
`x-api-remaining-credits`	Credits left in the current cycle
`x-api-credits-used`	Credits spent in the current cycle
`x-api-max-credits`	The allowance for the cycle
`x-api-version`	Version of the endpoint that answered

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter that has to change.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted here	A key restriction or an IP allow-list — never a bad key.
`429`	Rate limited, or out of credits	Read `error` to tell them apart, then back off or top up.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Plan	Per month	Credits	URL Encoder/Decoder calls	Per 1,000 calls
Free	Free	200	100	Free
Starter	$29.99	200,000	100,000	$0.30
Pro	$99.99	1,000,000	500,000	$0.20
Mega	$299.99	4,000,000	2,000,000	$0.15

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Compare all pricing tiers →

Call it from cURL — POST /v1/urlencode

No SDK to install — this is a plain HTTPS call to /v1/urlencode with your key in the x-api-key header. Swap in a real key and it runs as-is.

cURL

1
2

curl "https://api.apiverve.com/v1/urlencode" \
  -H "x-api-key: YOUR_API_KEY"

Resources

GitHubapiverve/urlencode-apiSource, issues and the examples this page is built from.ReferenceURL Encoder/Decoder API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/urlencodenpm APIVerve.API.URLEncoderDecoderNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Node.js — POST /v1/urlencode

Install the Node.js SDK, then call the URL Encoder/Decoder API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — npm

npm install @apiverve/urlencode

Node.js

const res = await fetch("https://api.apiverve.com/v1/urlencode", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

Resources

npm@apiverve/urlencodeThe published Node.js client, versioned and signed.GitHubapiverve/urlencode-apiSource, issues and the examples this page is built from.ReferenceURL Encoder/Decoder API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

APIVerve.API.URLEncoderDecoderNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Python — POST /v1/urlencode

No SDK to install — this is a plain HTTPS call to /v1/urlencode with your key in the x-api-key header. Swap in a real key and it runs as-is.

Python

import requests

res = requests.get(
    "https://api.apiverve.com/v1/urlencode",
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])

Resources

Also published for

@apiverve/urlencodenpm APIVerve.API.URLEncoderDecoderNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from C# / .NET — POST /v1/urlencode

Install the C# / .NET SDK, then call the URL Encoder/Decoder API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — NuGet

dotnet add package APIVerve.API.URLEncoderDecoder

C# / .NET

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

var json = await client.GetStringAsync("https://api.apiverve.com/v1/urlencode");
Console.WriteLine(json);

Resources

NuGetAPIVerve.API.URLEncoderDecoderThe published C# / .NET client, versioned and signed.GitHubapiverve/urlencode-apiSource, issues and the examples this page is built from.ReferenceURL Encoder/Decoder API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/urlencodenpm

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Go — POST /v1/urlencode

No SDK to install — this is a plain HTTPS call to /v1/urlencode with your key in the x-api-key header. Swap in a real key and it runs as-is.

req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/urlencode", nil)
req.Header.Set("x-api-key", "YOUR_API_KEY")

res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Resources

Also published for

@apiverve/urlencodenpm APIVerve.API.URLEncoderDecoderNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from PHP — POST /v1/urlencode

No SDK to install — this is a plain HTTPS call to /v1/urlencode with your key in the x-api-key header. Swap in a real key and it runs as-is.

PHP

$ch = curl_init("https://api.apiverve.com/v1/urlencode");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);

$response = curl_exec($ch);
echo $response;

Resources

Also published for

@apiverve/urlencodenpm APIVerve.API.URLEncoderDecoderNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Ruby — POST /v1/urlencode

No SDK to install — this is a plain HTTPS call to /v1/urlencode with your key in the x-api-key header. Swap in a real key and it runs as-is.

Ruby

require "net/http"

uri = URI("https://api.apiverve.com/v1/urlencode")
req = Net::HTTP::Get.new(uri)
req["x-api-key"] = "YOUR_API_KEY"

res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |h| h.request(req) }
puts res.body

Resources

Also published for

@apiverve/urlencodenpm APIVerve.API.URLEncoderDecoderNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Data Conversion

View all 33 →

All articles →

Extract Clean Content from Any WebpageTurn messy web pages into clean Markdown. Perfect for content migration, archiving, AI training data, and building read-later tools.Read

Generate PDFs from HTML with an APIConvert HTML to PDF programmatically. Tutorial covering invoices, reports, receipts, and certificates with code examples.Read

Automating Visual Testing With ScreenshotsCatch visual bugs before users do. Here's how to add screenshot-based testing to your workflow.Read

URL Encoder/Decoder API

Try it — live request, no key required

About the URL Encoder/Decoder API

What people use it for

Ways to call it

Other ways to use URL Encoder/Decoder

Questions.

Request parameters — POST /v1/urlencode

Required

Optional

Authentication

Response — POST /v1/urlencode

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — POST /v1/urlencode

Resources

Also published for

Call it from Node.js — POST /v1/urlencode

Resources

Also published for

Call it from Python — POST /v1/urlencode

Resources

Also published for

Call it from C# / .NET — POST /v1/urlencode

Resources

Also published for

Call it from Go — POST /v1/urlencode

Resources

Also published for

Call it from PHP — POST /v1/urlencode

Resources

Also published for

Call it from Ruby — POST /v1/urlencode

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — URL Encoder/Decoder API

Data Conversion

Related articles

Ready to build with URL Encoder/Decoder? Start with 200 free credits — one key unlocks all 300+ APIs.

Explore the catalog