ToolVet
75trust / 100

Count

by Count tokens in Onchain & crypto

x402 APIPassing, checked 2 h ago

Count the LLM tokens in text for a given model or encoding — exact for OpenAI and open models (Llama, Mistral, Qwen, Gemma, DeepSeek, Command-R); labelled-approximate for Claude & Gemini.

POST
https://tokens.openverbs.com/v1/count
Price
$0.004
per call in USDC
Uptime
100%
last 30 days
Response time
558 ms
734 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://tokens.openverbs.com/v1/count

Each call costs $0.004 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://tokens.openverbs.com/v1/count
content-type: application/json

{
  "encoding": "o200k_base",
  "model": "example",
  "text": "example"
}

Parameters

ParameterTypeRequiredDescription
encodingstringNoExplicit OpenAI BPE encoding. Overrides "model" and is always exact. Defaults to o200k_base. One of: o200k_base, cl100k_base, p50k_base, r50k_base.
modelstringNoLLM model name, e.g. "gpt-4o", "llama-3.1-70b", "claude-3-5-sonnet". Resolved to its tokenizer. Defaults to gpt-4o. Supported families: o200k_base, cl100k_base, p50k_base, r50k_base, llama3, llama2, mistral, qwen, gemma, deepseek, command-r, claude, gemini.
textstringYesThe text to tokenize. Empty string counts as 0 tokens.

Example response

The listing has no example response.

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.004.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://tokens.openverbs.com/v1/count' \
  -H 'content-type: application/json' \
  --data-raw '{"encoding":"o200k_base","model":"example","text":"example"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://tokens.openverbs.com/v1/count' \
  -H 'content-type: application/json' \
  --data-raw '{"encoding":"o200k_base","model":"example","text":"example"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftokens.openverbs.com%2Fv1%2Fcount&method=POST
const res = await pay("https://tokens.openverbs.com/v1/count", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "encoding": "o200k_base",
    "model": "example",
    "text": "example"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://tokens.openverbs.com/v1/count",
        json={
            "encoding": "o200k_base",
            "model": "example",
            "text": "example",
        },
    )
    print(res.status_code, res.text)

Security scan

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Recent checks

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2 h agoPassed402596 ms$0.004
7 h agoPassed402557 ms$0.004
12 h agoPassed402560 ms$0.004
17 h agoPassed402594 ms$0.004
22 h agoPassed402559 ms$0.004
Show 10 older checks
27 h agoPassed402551 ms$0.004
32 h agoPassed402613 ms$0.004
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46 h agoPassed402553 ms$0.004
2 days agoPassed402559 ms$0.004
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3 days agoPassed402549 ms$0.004