MurmurHash API

POST

Hash strings fast for data partitioning and bloom filters.

MurmurHash generates fast, non-cryptographic hashes using the MurmurHash3 algorithm. Ideal for hash tables, data partitioning, bloom filters, and checksums where cryptographic security isn't needed.

Try it — live request, no key required

Request

POSTapi.apiverve.com/v1/murmurhash

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": {
    "hash": 1586663183,
    "hashHex": "5e928f0f",
    "variant": "murmur3_32",
    "seed": 0
  }
}

About the MurmurHash API

Not suitable for cryptographic purposes - use for data structures, deduplication, consistent hashing, and other performance-critical applications.

What people use it for

Hash Tables: Generate keys for hash-based data structures
Data Partitioning: Consistently distribute data across shards
Bloom Filters: Fast hashing for probabilistic data structures
Deduplication: Quickly identify duplicate records

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 MurmurHash

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

Questions.

Common questions about the MurmurHash API.

Read the docs →

Which MurmurHash variants are supported?

The API supports both 32-bit and 128-bit MurmurHash3 variants. You choose your preferred variant with each request, and the response confirms the variant applied alongside the generated hash.

Can I supply a custom seed for consistent hashing?

Yes. You can supply an optional integer seed value with your text to ensure consistent, reproducible hash outputs across your applications and partitioned datasets.

Can I use these hashes to store passwords or secure tokens?

No. MurmurHash3 is strictly non-cryptographic and should never be used for cryptographic security or password hashing. It is intended for performance-critical data structures like hash tables, bloom filters, and deduplication systems.

What would 50,000 hash calculations a month cost me?

At 2 credits per call, 50,000 calculations use 100,000 credits, which uses half of the Starter plan's 200,000 monthly credits. That works out to about $0.30 per 1,000 calls. The Free plan includes 100 calls per month for testing.

What data format does the hash function accept?

The endpoint accepts any standard text string you provide. It processes the string directly and returns the calculated hash along with the seed and variant used.

Request parameters — POST /v1/murmurhash

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`	The text to hash

Optional

Parameter	Type	Example	Description
`seed`Optional	integer	`0`	Seed value for the hash function default 0 · range 0-inf
`variant`Optional	string	`32`	Hash variant: 32 (32-bit) or 128 (128-bit) `32128` default 32

Example request

curl -X POST "https://api.apiverve.com/v1/murmurhash" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"hello world","seed":0,"variant":"32"}'

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/murmurhash

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": {
    "hash": 1586663183,
    "hashHex": "5e928f0f",
    "variant": "murmur3_32",
    "seed": 0
  }
}

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
`hash`	number	`1586663183`	Generated MurmurHash3 hash value as an unsigned integer. Use hashHex for the hexadecimal string form
`hashHex`	string	`"5e928f0f"`	The hash rendered as a lowercase hexadecimal string
`variant`	string	`"murmur3_32"`	Hash variant that was used (32 or 128)
`seed`	number	`0`	Seed value used for hash generation

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	MurmurHash 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/murmurhash

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

Resources

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

Also published for

@apiverve/murmurhashnpm APIVerve.API.MurmurHashNuGet

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/murmurhash

Install the Node.js SDK, then call the MurmurHash 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/murmurhash

Node.js

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

Resources

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

Also published for

APIVerve.API.MurmurHashNuGet

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

Call it from Python — POST /v1/murmurhash

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

Python

import requests

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

Resources

Also published for

@apiverve/murmurhashnpm APIVerve.API.MurmurHashNuGet

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/murmurhash

Install the C# / .NET SDK, then call the MurmurHash 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.MurmurHash

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

Resources

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

Also published for

@apiverve/murmurhashnpm

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

Call it from Go — POST /v1/murmurhash

No SDK to install — this is a plain HTTPS call to /v1/murmurhash 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/murmurhash", 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/murmurhashnpm APIVerve.API.MurmurHashNuGet

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

Call it from PHP — POST /v1/murmurhash

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

PHP

$ch = curl_init("https://api.apiverve.com/v1/murmurhash");
curl_setopt($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/murmurhashnpm APIVerve.API.MurmurHashNuGet

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

Call it from Ruby — POST /v1/murmurhash

No SDK to install — this is a plain HTTPS call to /v1/murmurhash 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/murmurhash")
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/murmurhashnpm APIVerve.API.MurmurHashNuGet

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

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MurmurHash API

Try it — live request, no key required

About the MurmurHash API

What people use it for

Ways to call it

Other ways to use MurmurHash

Questions.

Request parameters — POST /v1/murmurhash

Required

Optional

Authentication

Response — POST /v1/murmurhash

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — POST /v1/murmurhash

Resources

Also published for

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

Resources

Also published for

Call it from Python — POST /v1/murmurhash

Resources

Also published for

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

Resources

Also published for

Call it from Go — POST /v1/murmurhash

Resources

Also published for

Call it from PHP — POST /v1/murmurhash

Resources

Also published for

Call it from Ruby — POST /v1/murmurhash

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — MurmurHash API

Data Processing

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