JSON to JSONP

Overview

Send a POST request containing a raw JSON object or stringified JSON payload along with an optional callback name. If omitted, the callback defaults to callback. The endpoint validates the JavaScript identifier, including dotted names, and encapsulates the payload into an executable JSONP string, returning both the callback name and the wrapped result.

Live Test JSON to JSONP API →

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.

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curl -X POST https://api.apiverve.com/v1/jsontojsonp \
  -H "x-api-key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "callback": "callbackFunction",
  "json": {
    "menu": {
      "id": "file",
      "value": "File",
      "popup": false
    }
  }
}'

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const res = await fetch('https://api.apiverve.com/v1/jsontojsonp', {
  method: 'POST',
  headers: {
    'x-api-key': 'your_api_key_here',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
  "callback": "callbackFunction",
  "json": {
    "menu": {
      "id": "file",
      "value": "File",
      "popup": false
    }
  }
}),
});

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

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

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import requests

res = requests.post(
    "https://api.apiverve.com/v1/jsontojsonp",
    headers={"x-api-key": "your_api_key_here"},
    json={
    "callback": "callbackFunction",
    "json": {
        "menu": {
            "id": "file",
            "value": "File",
            "popup": False
        }
    }
},
    timeout=15,
)
res.raise_for_status()

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

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package main

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

func main() {
	body := strings.NewReader(`{
  "callback": "callbackFunction",
  "json": {
    "menu": {
      "id": "file",
      "value": "File",
      "popup": false
    }
  }
}`)
	req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/jsontojsonp", 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.

Parameters

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

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.

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{
  "status": "ok",
  "error": null,
  "data": {
    "callback": "callbackFunction",
    "jsonp": "callbackFunction({\"menu\":{\"id\":\"file\",\"value\":\"File\",\"popup\":false}});"
  }
}

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.

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.

Use cases

Cross-Domain Widget Feeds

When third-party embed widgets need cross-domain data without CORS configuration, developers serve JSON payloads wrapped in dynamic client callback functions.

Legacy Portal Maintenance

Engineers supporting legacy enterprise portals convert modern JSON API outputs into JSONP responses so older web clients can parse responses through script tags.

Static Documentation Embeds

Technical writers embed live remote status objects into static HTML documentation sites by wrapping JSON records in custom callback handlers.

Client Mashup Prototyping

To test multi-domain data feeds before updating server headers, frontend developers convert mock JSON datasets into callback-wrapped strings on demand.

Other ways to use JSON to JSONP

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

Related

More in Data Conversion: