Verify any boolean expression with a complete truth table.
Truth Table Generator creates complete truth tables for boolean expressions with support for AND, OR, NOT, XOR, NAND, and NOR operators.
Try it — live request, no key required
GETapi.apiverve.com/v1/truthtable?expression=A%20AND%20B%20OR%20C
Query parametersVerificationFormat
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{
"status": "ok",
"error": null,
"data": {
"expression": "A AND B OR C",
"normalized": "A && B || C",
"variables": [
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"B",
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"D",
"N",
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"R"
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}
About the Truth Table Generator API
Perfect for computer science education, digital logic design, and verifying boolean expressions with automatic operator normalization.
What people use it for
- Computer Science Education
- Teach boolean logic and truth tables with interactive expression evaluation
- Digital Logic Design
- Verify logic gate combinations and circuit behavior for hardware design
- Boolean Expression Verification
- Test and validate complex boolean expressions programmatically
- Programming Logic Testing
- Debug and verify conditional logic in software applications
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
Beta
New
Other ways to use Truth Table Generator
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 Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.on VerveContext
Which boolean operators can I include in an expression?
The API supports standard logic operators including AND, OR, NOT, XOR, NAND, and NOR. You can use uppercase letters from A through Z as variable names to construct simple or compound expressions.
Which plan fits 25,000 truth table evaluations a month?
The Starter plan covers this volume easily. Each evaluation uses 2 credits, so 25,000 calls consume 50,000 of Starter's 200,000 monthly credits, which works out to about $0.0003 per call or $0.30 per 1,000 calls. The Free plan includes 100 evaluations per month.
Can I get the preformatted ASCII table on the Free plan?
No. The ASCII text table is a premium field available only on paid plans. Upgrading to Starter or higher also unlocks the normalized expression string, the list of extracted variables, the variable count, and the total row count.
How does the API return the generated table rows?
Every call returns an array of rows detailing every binary input combination alongside the final calculated result. Each row contains an object mapping each variable to its current state (0 or 1) and a result field indicating the evaluated truth value.
How does the API normalize non-standard logic symbols?
Paid tiers return a normalized expression field where verbal operators like AND and OR are systematically translated into standard programming notation like && and ||. The raw expression string is always preserved in the response.
Request parameters — GET /v1/truthtable
Sent in the query string. 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 |
|---|---|---|---|
expressionRequired | string | A AND B OR C | Boolean expression using A-Z variables and operators (AND, OR, NOT, XOR, NAND, NOR) |
curl "https://api.apiverve.com/v1/truthtable?expression=A%20AND%20B%20OR%20C" \
-H "x-api-key: YOUR_API_KEY"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-keyRequired | Every request | Your API key. Header names are case-insensitive, so X-API-Key is the same header. |
AuthorizationAlternate | Instead of the above | Bearer <key> — for clients that only expose bearer auth. Resolves to the same account and the same billing. |
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 — GET /v1/truthtable
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.
{
"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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}
}
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 |
|---|---|---|---|
expression | string | "A AND B OR C" | Original boolean expression input by user |
normalizedPremium | string | "A && B || C" | Expression normalized with standard operators like && and || |
variablesPremium | array | [A, ...] | Array of unique variable names found in expression |
variableCountPremium | number | 7 | Total count of unique variables in boolean expression |
rowCountPremium | number | 128 | Number of rows in truth table (2^variableCount) |
rows | array[128] | Array of truth table rows with inputs and result values | |
inputs | object | {...} | Input variable values for current truth table row |
A | number | 0 | |
B | number | 0 | |
C | number | 0 | |
D | number | 0 | |
N | number | 0 | |
O | number | 0 | |
R | number | 0 | |
result | number | 0 | Boolean result (0 or 1) for given input combination |
asciiTablePremium | string | "| A | B | C | D | N | O | R | Result |
|----------|----------|----------|----------|----… | ASCII formatted table representation for easy display |
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 | Truth Table Generator 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.
Call it from cURL — GET /v1/truthtable
No SDK to install — this is a plain HTTPS call to /v1/truthtable with your key in the x-api-key header. Swap in a real key and it runs as-is.
curl "https://api.apiverve.com/v1/truthtable" \
-H "x-api-key: YOUR_API_KEY"Resources
GitHubapiverve/truthtable-apiSource, issues and the examples this page is built from.ReferenceTruth Table Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from Node.js — GET /v1/truthtable
Install the Node.js SDK, then call the Truth Table Generator API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.
npm install @apiverve/truthtableconst res = await fetch("https://api.apiverve.com/v1/truthtable", {
headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);Resources
npm@apiverve/truthtableThe published Node.js client, versioned and signed.GitHubapiverve/truthtable-apiSource, issues and the examples this page is built from.ReferenceTruth Table Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from Python — GET /v1/truthtable
No SDK to install — this is a plain HTTPS call to /v1/truthtable with your key in the x-api-key header. Swap in a real key and it runs as-is.
import requests
res = requests.get(
"https://api.apiverve.com/v1/truthtable",
headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])Resources
GitHubapiverve/truthtable-apiSource, issues and the examples this page is built from.ReferenceTruth Table Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from C# / .NET — GET /v1/truthtable
Install the C# / .NET SDK, then call the Truth Table Generator API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.
dotnet add package APIVerve.API.TruthTableGeneratorusing var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");
var json = await client.GetStringAsync("https://api.apiverve.com/v1/truthtable");
Console.WriteLine(json);Resources
NuGetAPIVerve.API.TruthTableGeneratorThe published C# / .NET client, versioned and signed.GitHubapiverve/truthtable-apiSource, issues and the examples this page is built from.ReferenceTruth Table Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from Go — GET /v1/truthtable
No SDK to install — this is a plain HTTPS call to /v1/truthtable 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/truthtable", 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
GitHubapiverve/truthtable-apiSource, issues and the examples this page is built from.ReferenceTruth Table Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from PHP — GET /v1/truthtable
No SDK to install — this is a plain HTTPS call to /v1/truthtable with your key in the x-api-key header. Swap in a real key and it runs as-is.
$ch = curl_init("https://api.apiverve.com/v1/truthtable");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);
$response = curl_exec($ch);
echo $response;Resources
GitHubapiverve/truthtable-apiSource, issues and the examples this page is built from.ReferenceTruth Table Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from Ruby — GET /v1/truthtable
No SDK to install — this is a plain HTTPS call to /v1/truthtable with your key in the x-api-key header. Swap in a real key and it runs as-is.
require "net/http"
uri = URI("https://api.apiverve.com/v1/truthtable")
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.bodyResources
GitHubapiverve/truthtable-apiSource, issues and the examples this page is built from.ReferenceTruth Table Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Zero-code embed — one snippet, no backend
Drop an interactive Truth Table Generator form onto any page. The widget calls the API for you, so no key ever appears in your markup and there is nothing to deploy.
Loading preview…
Changelog — Truth Table Generator API
Every change to this endpoint, newest first. Breaking changes ship as a new version and the previous one keeps serving — response fields are added, never removed or retyped in place, so an integration written against v1 keeps working.
Nothing recorded yet
Entries are picked up from dated catalog snapshots, so the first one appears after the next snapshot that moves something. A period where nothing changed produces no entry — silence is a valid changelog for the Truth Table Generator API.
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