Truth Table Generator API
Overview
To use Truth Table Generator, you need an API key. You can get one by creating a free account and visiting your dashboard.
GET Endpoint
https://api.apiverve.com/v1/truthtableExample
How to call the Truth Table Generator API in different programming languages.
curl -X GET \
"https://api.apiverve.com/v1/truthtable?expression=A%20AND%20B%20OR%20C" \
-H "X-API-Key: your_api_key_here"const response = await fetch('https://api.apiverve.com/v1/truthtable?expression=A%20AND%20B%20OR%20C', {
method: 'GET',
headers: {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
});
const data = await response.json();
console.log(data);import requests
headers = {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
response = requests.get('https://api.apiverve.com/v1/truthtable?expression=A%20AND%20B%20OR%20C', headers=headers)
data = response.json()
print(data)package main
import (
"fmt"
"io"
"net/http"
)
func main() {
req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/truthtable?expression=A%20AND%20B%20OR%20C", nil)
req.Header.Set("X-API-Key", "your_api_key_here")
req.Header.Set("Content-Type", "application/json")
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
body, _ := io.ReadAll(resp.Body)
fmt.Println(string(body))
}{
"status": "ok",
"error": null,
"data": {
"expression": "A AND B OR C",
"normalized": "A && B || C",
"variables": [
"A",
"B",
"C",
"D",
"N",
"O",
"R"
],
"variableCount": 7,
"rowCount": 128,
"rows": [
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}
}Authentication
The Truth Table Generator API requires authentication via API key. Include your API key in the request header:
X-API-Key: your_api_key_hereInteractive API Playground
Test the Truth Table Generator API directly in your browser with live requests and responses.
Parameters
The following parameters are available for the Truth Table Generator API:
Generate Truth Table
| Parameter | Type | Required | Description | Default | Example |
|---|---|---|---|---|---|
expression | string | required | Boolean expression using A-Z variables and operators (AND, OR, NOT, XOR, NAND, NOR) | - |
Response
The Truth Table Generator API returns responses in JSON, XML, YAML, and CSV formats. The JSON response is shown in the Example section above; alternative formats below.
Other Response Formats
<?xml version="1.0" encoding="UTF-8"?>
<response>
<status>ok</status>
<error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
<data>
<expression>A AND B OR C</expression>
<normalized>A && B || C</normalized>
<variables>
<variable>A</variable>
<variable>B</variable>
<variable>C</variable>
<variable>D</variable>
<variable>N</variable>
<variable>O</variable>
<variable>R</variable>
</variables>
<variableCount>7</variableCount>
<rowCount>128</rowCount>
<rows>
<row>
<inputs>
<A>0</A>
<B>0</B>
<C>0</C>
<D>0</D>
<N>0</N>
<O>0</O>
<R>0</R>
</inputs>
<result>0</result>
</row>
<row>
<inputs>
<A>0</A>
<B>0</B>
<C>0</C>
<D>0</D>
<N>0</N>
<O>0</O>
<R>1</R>
</inputs>
<result>0</result>
</row>
<row>
<inputs>
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<B>0</B>
<C>0</C>
<D>0</D>
<N>0</N>
<O>1</O>
<R>0</R>
</inputs>
<result>0</result>
</row>
<row>
<inputs>
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<B>0</B>
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<O>1</O>
<R>1</R>
</inputs>
<result>0</result>
</row>
<row>
<inputs>
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</inputs>
<result>0</result>
</row>
<row>
<inputs>
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</inputs>
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</row>
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</inputs>
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</row>
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</inputs>
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</row>
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</inputs>
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</row>
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</inputs>
<result>0</result>
</row>
<row>
<inputs>
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</inputs>
<result>0</result>
</row>
<row>
<inputs>
<A>0</A>
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</inputs>
<result>0</result>
</row>
<row>
<inputs>
<A>0</A>
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</row>
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<row>
<!-- ... response truncated (1690 total lines) -->status: ok
error: null
data:
expression: A AND B OR C
normalized: A && B || C
variables:
- A
- B
- C
- D
- 'N'
- O
- R
variableCount: 7
rowCount: 128
rows:
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R: 0
result: 0
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result: 0
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result: 0
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result: 0
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result: 0
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|---|---|
| expression | A AND B OR C |
| normalized | A && B || C |
| variables | [A,B,C,D,N,O,R] |
| variableCount | 7 |
| rowCount | 128 |
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| | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | | |
| | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | | |
| | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | | |
| | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | | |
| | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | | |
| | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | | |
| | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | | |
| | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | | |
| | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | | |
| | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | | |
| | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | | |
| | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | | |
| | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | | |
| | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | | |
| | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | | |
| | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | | |
| | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | | |
| | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | | |
| | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | | |
| | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | | |
| | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | | |
| | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | | |
| | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | | |
| | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | | |
| | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 1 | | |
| | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | | |
| | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | | |
| | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | | |
| | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | | |
| | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | | |
| | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | | |
| | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | | |
| | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | | |
| | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | | |
| | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | | |
| | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | | |
| | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | | |
| | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | | |
| | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | | |
| | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | | |
| | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | | |
| | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | | |
| | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | | |
| | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | | |
| | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | | |
| | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | | |
| | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | | |
| | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | | |
| | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | | |
| | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | | |
| | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | | |
| | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | | |
| | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | | |
| | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | | |
| | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | | |
| | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | | |
| | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | | |
| | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | | |
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | | |
Response Structure
All API responses follow a consistent structure with the following fields:
| Field | Type | Description | Example |
|---|---|---|---|
status | string | Indicates whether the request was successful ("ok") or failed ("error") | ok |
error | string | null | Contains error message if status is "error", otherwise null | null |
data | object | null | Contains the API response data if successful, otherwise null | {...} |
Learn more about response formats →
Response Data Fields
When the request is successful, the data object contains the following fields:
| Field | Type | Sample Value | Description |
|---|---|---|---|
expression | string | Original boolean expression input by user | |
normalizedPremium | string | Expression normalized with standard operators like && and || | |
variablesPremium | array | Array of unique variable names found in expression | |
variableCountPremium | number | Total count of unique variables in boolean expression | |
rowCountPremium | number | Number of rows in truth table (2^variableCount) | |
| [ ] Array items: | array[128] | Array of truth table rows with inputs and result values | |
â”” inputs | object | Input variable values for current truth table row | |
â”” A | number | - | |
â”” B | number | - | |
â”” C | number | - | |
â”” D | number | - | |
â”” N | number | - | |
â”” O | number | - | |
â”” R | number | - | |
â”” result | number | Boolean result (0 or 1) for given input combination | |
asciiTablePremium | string | ASCII formatted table representation for easy display |
Headers
Only X-API-Key is required. Optional headers include Accept for response format negotiation (JSON, XML, or YAML), User-Agent, and X-Request-ID for request tracing. See all request headers →
GraphQL AccessALPHA
Access Truth Table Generator through GraphQL to combine it with other API calls in a single request. Query only the truth table generator data you need with precise field selection, and orchestrate complex data fetching workflows.
Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.
POST https://api.apiverve.com/v1/graphqlquery {
truthtable(
input: {
expression: "A AND B OR C"
}
) {
expression
normalized
variables
variableCount
rowCount
rows
asciiTable
}
}Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.
CORS Support
The Truth Table Generator API accepts cross-origin requests from any origin, so it can be called directly from browser-based applications without a proxy. See CORS support →
Rate Limiting
Truth Table Generator requests are throttled per minute on the Free plan and unthrottled on paid plans. Exceeding the limit returns 429 Too Many Requests; rate-limit usage is reported in the X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset response headers. See per-plan limits and best practices →
Error Codes
The Truth Table Generator API uses standard HTTP status codes — 200 on success, 400 for invalid parameters, 401 for missing or invalid keys, 403 for insufficient credits, 429 for rate-limit exhaustion, and 500/503 for server-side issues. Each error response includes an X-Request-ID header you can quote when contacting support. See full error handling guide →
SDKs for Truth Table Generator
Official Truth Table Generator packages on npm, PyPI, NuGet, and JitPack — plus a Postman collection and an OpenAPI spec. See the SDK guide →
No-Code Integrations
Truth Table Generator works with Zapier, Make, Pipedream, n8n, and Power Automate using the same API key. See setup guides →
Frequently Asked Questions
How do I get an API key for Truth Table Generator?
How many credits does Truth Table Generator cost?
Each successful Truth Table Generator API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful truth table generator lookups.
Can I use Truth Table Generator in production?
The free plan is for testing and development only. For production use of Truth Table Generator, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.
Can I use Truth Table Generator from a browser?
What happens if I exceed my Truth Table Generator credit limit?
When you reach your monthly credit limit, Truth Table Generator API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.








