Tense Converter API Reference

Overview

Tense Converter works by analyzing the text provided and converting it to the past or future tense. It uses advanced algorithms to convert the text to the specified tense and returns the converted text.

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

POSThttps://api.apiverve.com/v1/tenseconverter

curl -X POST https://api.apiverve.com/v1/tenseconverter \
  -H "x-api-key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "text": "I am walking down the street, and I can see a dog",
  "tense": "past"
}'

const res = await fetch('https://api.apiverve.com/v1/tenseconverter', {
  method: 'POST',
  headers: {
    'x-api-key': 'your_api_key_here',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
  "text": "I am walking down the street, and I can see a dog",
  "tense": "past"
}),
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

import requests

res = requests.post(
    "https://api.apiverve.com/v1/tenseconverter",
    headers={"x-api-key": "your_api_key_here"},
    json={
    "text": "I am walking down the street, and I can see a dog",
    "tense": "past"
},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

package main

import (
	"fmt"
	"io"
	"net/http"
	"strings"
)

func main() {
	body := strings.NewReader(`{
  "text": "I am walking down the street, and I can see a dog",
  "tense": "past"
}`)
	req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/tenseconverter", body)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

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.

Parameters

Sent as JSON in the request body. Premium parameters are accepted on every plan but only take effect on plans that include them.

Parameter	Type	Description
`text`Required	string	The text to convert to past or future tense
`tense`Required	string	The tense to convert the text to `pastfuture` default past

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "tense": "past",
    "result": "I was walking down the street, and I could see a dog",
    "changed": true
  }
}

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
`tense`	string	`"past"`	The target tense conversion applied (past or future)
`result`	string	`"I was walking down the street, and I could see a dog"`	Converted text with applied tense transformation
`changed`	boolean	`true`	Whether the text was modified during conversion

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted	A key restriction or IP allow-list; see key scoping.
`429`	Rate limited, or out of credits	Read `error` to tell them apart; see rate limits.

Use cases

Content Generation: Use the Tense Converter API to convert text to past or future tense for content generation. Use the data to create variations, improve readability, and enhance engagement
Language Processing: Convert text to past or future tense by using the Tense Converter API for language processing. Use the data to analyze text, extract meaning, and enhance understanding
Text Analysis: Use the Tense Converter API to convert text to past or future tense for text analysis. Use the data to analyze language, extract insights, and improve comprehension
Writing Assistance: Convert text to past or future tense by using the Tense Converter API for writing assistance. Use the data to improve grammar, enhance style, and refine language

Other ways to use Tense Converter

Set up Tense Converter on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.VerveKit →Reference →

Use it in Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.VerveSheets →Reference →

Tense Converter