$0.001
per call · USD Coin on Base
x402-gateway tool: verify_semaphore — Verify a Semaphore ZK proof locally using Groth16 (embedded official vkey). No external dependency. Send the proof object from @semaphore-protocol/proof generateProof().
Endpoint
POST https://x402.freeq.one/tools/verify_semaphore6
Calls / 30d
1
Unique payers / 30d
Aug 22
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://x402.freeq.one/tools/verify_semaphore", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"proof": {
"description": "Semaphore proof: { merkleTreeDepth, merkleTreeRoot, nullifier, message, scope, points }",
"type": "object"
}
}),
});
const data = await res.json();curl -X POST \
"https://x402.freeq.one/tools/verify_semaphore" \
-H "Content-Type: application/json" \
-d '{"proof":{"description":"Semaphore proof: { merkleTreeDepth, merkleTreeRoot, nullifier, message, scope, points }","type":"object"}}' \
-H "X-PAYMENT: <signed x402 payment>"Payment details
0x90b0dc893406d6ea63bb077ed59f5e8340f98d84USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
Pin it to the top of Developer Tools and the homepage with a featured placement.
More from x402-gateway & similar services
x402-gateway · SE Company
x402-gateway.ai
Swedish company basics by org.nr. Look up any Swedish organisation by its 10-digit organisationsnummer (e.g. /api/v1/se/company/5567037485 for Spotify AB): registered and trade names, legal form, active status, bankruptcy/liquidation/reconstruction, registered address, SNI 2007 industry codes and activity description. Live from Bolagsverket's official register with SCB business data. No API key — pay per call in USDC.
x402-gateway · Tools LLM Chat
x402.freeq.one
LLM Chat: Chat with a language model. OpenAI-compatible /v1/chat/completions interface. Supports 50+ models. Free models (auto, eco, premium) are $0 — paid models (gpt-5.2, claude-opus-5, deepseek-v4-pro, ...) are charged at cost. See /tools/llm_chat/models for the full model list and rates. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/llm_chat.
x402-gateway · Tools Wallet Verify Nostr
x402.freeq.one
x402-gateway tool: wallet_verify_nostr — Verify a NIP-98 Nostr HTTP auth event. Returns the signer pubkey. Stateful replay protection: each event id can only be verified once.