$0.05
per call · USD Coin on Base
SYNTHORA regwatch: x402 Registry Watch: signed Ed25519 deltas of the x402/A2A endpoint registry (payTo/listings/endpoints). Pay-per-event feed pull. POST {"since":"<cursor|ISO>","slug":"<slug>","limit":<=200}.
Endpoint
POST https://api.hergertsynthora.com/v1/regwatch3
Calls / 30d
2
Unique payers / 30d
Aug 23
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://api.hergertsynthora.com/v1/regwatch", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"limit": 10,
"since": "2026-01-01",
"slug": "x402"
}),
});
const data = await res.json();curl -X POST \
"https://api.hergertsynthora.com/v1/regwatch" \
-H "Content-Type: application/json" \
-d '{"limit":10,"since":"2026-01-01","slug":"x402"}' \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"niche": "registry_watch",
"ok": true,
"result": {
"as_of": "2026-08-05T16:48:43Z",
"count": 0,
"cursor": null,
"feed": [],
"source": "registry-watch"
}
}Payment details
0x10800a5a5b9d72251566ec651e862a8b4b427de0USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
Pin it to the top of Social & Community and the homepage with a featured placement.
More from SYNTHORA & similar services
SYNTHORA · WHO GHO Timeseries
api.hergertsynthora.com
SYNTHORA who-gho-timeseries: WHO Global Health Observatory indicator time series by country (life expectancy etc.) — public-health data for research and policy agents. $0.005 USDC x402 Base. Ratings: GET /v1/ratings/who-gho-timeseries.
SYNTHORA · Defi Yields
api.hergertsynthora.com
SYNTHORA defi-yields: stablecoin DeFi yields ranked with a risk outlier detector — APY vs class median (>=3x median = the excess yield IS the risk price). Only pools with TVL >= $10M. Source: DefiLlama, free, no key. $0.005 USDC x402 Base.
SYNTHORA · Bitcoin Fees
api.hergertsynthora.com
SYNTHORA bitcoin-fees: Bitcoin fee tiers in sat/vB (fastest/half-hour/hour/economy/minimum) plus current block height. Source: mempool.space public API, keyless. Bitcoin only.