Reverse Text API

POST

Invert any text block by character, word, or line.

Reverse Text transforms text by reversing characters, words, or lines with multiple reversal modes for different use cases.

Try it — live request, no key required

Request

POSTapi.apiverve.com/v1/reversetext

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": {
    "reversed": "dlroW olleH",
    "original": "Hello World",
    "mode": "characters",
    "length": 11
  }
}

About the Reverse Text API

Handles up to 10,000 characters and provides precise control over how text content is reversed and reorganized.

What people use it for

Text Effects: Create reversed text effects for creative content and visual designs
String Manipulation: Reverse strings for data processing and algorithm testing
Content Transformation: Transform text content with different reversal modes for specific formatting needs
Data Processing: Process and reverse text data for analysis and transformation tasks

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 Reverse Text

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 Reverse Text API.

Read the docs →

Can I reverse word order without scrambling individual words?

Yes. You can reverse text strictly by words, which keeps the spelling of each individual word intact while inverting their order. You can also reverse character by character or line by line.

What is the maximum length of text I can process at once?

You can send up to 10,000 characters in a single request. The service will transform the entire submitted string according to the reversal mode you pick.

Can I reorder lines of text from bottom to top?

Yes. Line reversal mode changes the sequence of lines while preserving the content of each line as-is. This is useful for reordering multiline logs, transcripts, or lists.

Does the response return the original input alongside the reversed text?

Yes. Each response includes the original input string, the reversed result, and the reversal mode that was applied. This makes it simple to verify transformations or store both versions side by side.

How far does the Starter plan go for text reversals?

Starter covers 100,000 text reversals per month, which works out to about $0.30 per 1,000 calls. Each reversal consumes 2 credits. If you need to test the endpoints first, the Free plan provides 100 calls per month.

Request parameters — POST /v1/reversetext

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`	Text to reverse

Optional

Parameter	Type	Example	Description
`mode`Optional	string	`characters`	Reversal mode `characterswordslines` default characters

Example request

curl -X POST "https://api.apiverve.com/v1/reversetext" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"Hello World","mode":"characters"}'

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/reversetext

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": {
    "reversed": "dlroW olleH",
    "original": "Hello World",
    "mode": "characters",
    "length": 11
  }
}

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
`reversed`	string	`"dlroW olleH"`	Reversed text result
`original`	string	`"Hello World"`	Original input text
`mode`	string	`"characters"`	Reversal mode that was applied
`length`	number	`11`	Character length of the original text

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	Reverse Text 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/reversetext

No SDK to install — this is a plain HTTPS call to /v1/reversetext 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/reversetext" \
  -H "x-api-key: YOUR_API_KEY"

Resources

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

Also published for

@apiverve/reversetextnpm apiverve-reversetextPyPI APIVerve.API.ReverseTextNuGet

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/reversetext

Install the Node.js SDK, then call the Reverse Text 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/reversetext

Node.js

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

Resources

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

Also published for

apiverve-reversetextPyPI APIVerve.API.ReverseTextNuGet

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

Call it from Python — POST /v1/reversetext

Install the Python SDK, then call the Reverse Text API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — PyPI

pip install apiverve-reversetext

Python

import requests

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

Resources

PyPIapiverve-reversetextThe published Python client, versioned and signed.GitHubapiverve/reversetext-apiSource, issues and the examples this page is built from.ReferenceReverse Text API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/reversetextnpm APIVerve.API.ReverseTextNuGet

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/reversetext

Install the C# / .NET SDK, then call the Reverse Text 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.ReverseText

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/reversetext");
Console.WriteLine(json);

Resources

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

Also published for

@apiverve/reversetextnpm apiverve-reversetextPyPI

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

Call it from Go — POST /v1/reversetext

No SDK to install — this is a plain HTTPS call to /v1/reversetext 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/reversetext", 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/reversetextnpm apiverve-reversetextPyPI APIVerve.API.ReverseTextNuGet

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

Call it from PHP — POST /v1/reversetext

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

PHP

$ch = curl_init("https://api.apiverve.com/v1/reversetext");
curl_setopt($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/reversetextnpm apiverve-reversetextPyPI APIVerve.API.ReverseTextNuGet

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

Call it from Ruby — POST /v1/reversetext

No SDK to install — this is a plain HTTPS call to /v1/reversetext 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/reversetext")
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/reversetextnpm apiverve-reversetextPyPI APIVerve.API.ReverseTextNuGet

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

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Reverse Text API

Try it — live request, no key required

About the Reverse Text API

What people use it for

Ways to call it

Other ways to use Reverse Text

Questions.

Request parameters — POST /v1/reversetext

Required

Optional

Authentication

Response — POST /v1/reversetext

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — POST /v1/reversetext

Resources

Also published for

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

Resources

Also published for

Call it from Python — POST /v1/reversetext

Resources

Also published for

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

Resources

Also published for

Call it from Go — POST /v1/reversetext

Resources

Also published for

Call it from PHP — POST /v1/reversetext

Resources

Also published for

Call it from Ruby — POST /v1/reversetext

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — Reverse Text API

Text Processing

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