ToolVet
77trust / 100

Prices Service

by Annalist in Markets & finance

x402 APIPassing, checked 58 min ago

Price history of an x402 service by host or URL: each listed endpoint's price, first-seen date and changes, price changes in 30 days (raised, lowered, delisted), the prices it actually quoted when we called it, and where it sits against similar services by category (market median and percentile). Signed.

GET https://api.annalist.dev/v1/prices/service

Last 30 days

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

Uptime
100%
Response time
503 ms typical, 612 ms slowest 5%
Last check
58 min ago
Next check
any minute now

How to call it

GET https://api.annalist.dev/v1/prices/service

Each call costs $0.01 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.

GET https://api.annalist.dev/v1/prices/service?host=api.annalist.dev

Parameters

ParameterTypeRequiredDescription
hoststringNohost name, for example api.example.com
urlstringNoor any URL on the service

Example response

The provider's example. We can't check it without paying.

{
  "data": {
    "changes_30d": {
      "raised": 1
    },
    "host": "api.example.com",
    "listed": {
      "median_usdc": 0.01
    },
    "vs_market": [
      {
        "market_median_usdc": 0.0095,
        "percentile": 0.62,
        "tag": "search"
      }
    ]
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.01.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.annalist.dev/v1/prices/service?host=api.annalist.dev'

# 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 - 'https://api.annalist.dev/v1/prices/service?host=api.annalist.dev' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.annalist.dev%2Fv1%2Fprices%2Fservice
const res = await pay("https://api.annalist.dev/v1/prices/service?host=api.annalist.dev");
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.annalist.dev/v1/prices/service?host=api.annalist.dev")
    print(res.status_code, res.text)

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
58 min agoPassed402363 ms$0.01
5 h agoPassed402785 ms$0.01
9 h agoPassed402612 ms$0.01
13 h agoPassed402452 ms$0.01
23 h agoPassed402503 ms$0.01