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Losbeto Brazil Macro As-Of (Point-in-Time) Data
x402
Losbeto Brazil Macro As-Of (Point-in-Time) Data is a paid API for AI agents from markets.losbeto.xyz, paid per call via x402, $0.09/call, status unknown (last checked 2026-10-12).
Returns a historical Brazilian macro series value as it was actually published on a given past date, eliminating look-ahead bias for backtesting
Price / call$0.09
Success—
StatusUnknown
How this service works
OpenAI-compatible LLM gateway at $0.005/call — change base_url, pay in USDC. Plus pay-per-call market data: multi-oracle price consensus, sentiment, forex, equities, commodities, Brazil macro (BCB/B3) and crypto. No API keys, no accounts. USDC on Base, Solana and Algorand via x402.
Output
A JSON object containing the requested Brazilian macro series value (e.g. Selic, CDI, IPCA 12m, IGP-M, PTAX, EUR/BRL) as it was published on the specified date — the original vintage, not subsequently revised data. Includes the Merkle leaf for the data point and the Ed25519-signed Merkle root for that day, enabling cryptographic verification of the historical archive.
Example use cases
Backtest a Brazilian rates strategy
“I'm backtesting a fixed-income strategy on Brazilian assets and need the Selic rate that was actually published on 2021-03-17 — not the revised value, but what the market actually saw that day. Can you fetch that point-in-time figure?”
Verify historical PTAX for trade settlement
“We had a USD/BRL forward contract that settled on 2020-11-10 and I need to confirm the official PTAX rate as published by BCB on that exact date, including the cryptographic proof of authenticity.”
Audit inflation assumptions in a past model
“Our risk model from early 2023 used an IPCA 12-month figure — can you pull what the IPCA 12m reading was as known on 2023-01-31 so I can verify we didn't accidentally use a revised number in our calculations?”
Technical details
Endpoint
GEThttps://markets.losbeto.xyz/br-asof?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need Brazilian macro data (Selic, CDI, IPCA, IGP-M, PTAX, EUR/BRL) exactly as it was published on a specific historical date — essential for rigorous financial backtesting that must avoid look-ahead bias from data revisions. Prefer over general macro APIs when cryptographic proof-of-vintage is required for audit or compliance purposes, or when you specifically need BCB/B3 data with Merkle-proof integrity guarantees. Not appropriate for current/live rate lookups.
Side effects
- Missing required query params (date or series) returns a 400 error
- Date outside available archive range returns no data or error
- Invalid series identifier returns an error or empty result
- Payment not made in USDC via x402 returns a 402 Payment Required response
- Date in future or series with no publication on that date returns null/empty value
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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