Get Quant History
GET/v1/cryptodata/quant/history
Past probability rows — the verification surface (Pro Plus). Every row records what the model said at that moment, with `backfilled` distinguishing live point-in-time inferences (15-minute cadence) from retro-computed history (1-hour cadence, written by the backfill script) and `model_version` pinning which artifact produced it. Use this to score our calls against what actually happened — black-box probabilities are worthless; auditable ones aren't.
Price
$0.01/ callEdge cache
900s
Uptime 24h
100.00%
p95
1.43s
Parameters
| Name | In | Type | Description |
|---|---|---|---|
| scope | query | string = market | 'market' or a coin symbol, e.g. BTC |
| start* | query | string | ISO 8601 or unix ms |
| end | query | string | |
| horizon | query | string (4h | 24h) | |
| limit | query | integer = 500 | |
| format | query | string (json | csv) = json |
Code
# 1. No key, no payment: the gateway answers 402 with the price
curl -i "https://api.realtimeapi.ai/v1/cryptodata/quant/history?start=2026-10-28"
# 2. Pay: retry with a signed x402 payment (any x402 client builds this header)
curl "https://api.realtimeapi.ai/v1/cryptodata/quant/history?start=2026-10-28" -H "PAYMENT-SIGNATURE: $X402_PAYMENT"// npm i @x402/fetch @x402/core @x402/evm viem
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
const client = x402Client.fromConfig({ schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(privateKeyToAccount(PRIVATE_KEY)) }] });
const pay = wrapFetchWithPayment(fetch, client);
const data = await (await pay("https://api.realtimeapi.ai/v1/cryptodata/quant/history?start=2026-10-28")).json();
console.log(data);# pip install x402 eth-account requests
from eth_account import Account
from x402.clients.requests import x402_requests
session = x402_requests(Account.from_key(PRIVATE_KEY))
print(session.get("https://api.realtimeapi.ai/v1/cryptodata/quant/history?start=2026-10-28").json())curl "https://api.realtimeapi.ai/v1/cryptodata/quant/history?start=2026-10-28" -H "X-API-Key: $RTAPI_KEY"Frequently asked questions
How do I get get quant history from CryptoDataAPI?
Send GET https://api.realtimeapi.ai/v1/cryptodata/quant/history. Pay $0.01 per request with x402, or send an X-API-Key header.
What does GET /quant/history cost?
$0.01 per successful request in USDC on Base. Failed requests are never charged.
Can I call this endpoint from an MCP client?
Yes. Connect any MCP client to the RealtimeAPI server and use call_feed with this endpoint's URL, or get_quote to check the price first.