Methodology & Data Source

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Bolivia Blue publishes a P2P reference for Bolivia’s blue dollar, with periodic updates, a JSON API and methodology documentation.

Data Source

Collectors query public USDT/BOB data from Binance, El Dorado, OKX and Bybit. Only responding platforms are used; a reading may include one source. The P2P reference is not a cash-counter offer.

How the Rate is Calculated

Each update calculates a buy and sell reference per platform. Order books use their median; El Dorado contributes its public price. The final reference is the median of available platform values, with equal weight per platform.

• Buy rate: median of buy offers for USDT (in BOB per USDT).
• Sell rate: median of sell offers for USDT (in BOB per USDT).
• The "mid" (average) value we show is the midpoint between buy and sell.

Update Frequency

Automatic processes attempt periodic quote updates. Both collectors use the same USD/BOB calculation and save observations to the database. Always check the observation timestamp: external services and scheduling can be delayed.

The time of the last update is shown on the homepage and is available in the API response.

Blue Dollar vs Official Rate

The official exchange rate is set by the Central Bank of Bolivia (BCB) and is used by banks for regulated operations. The blue dollar is the price in the parallel (P2P) market and is often different: it can be above or below depending on supply and demand.

On our platform we show both rates: the parallel market (blue, P2P reference) and the official rate (from the BCB or sources that reflect the official rate). We do not modify or mix these sources.

Historical Data and Downloads

We store a record of each update, which allows you to query historical series, charts and statistics. Historical data is available on the historical data page and via stable URLs in CSV and JSON.

Public export: CSV and JSON for 30d or a recent all sample, capped at 4,000 rows. Extended ranges use the separate backend and require enabled access.

History and source limitations

Historical rows do not record the participating platforms or collector version. Different methods operated in the past; we do not relabel those rows as a homogeneous series. When sources_used is empty, that observation’s source composition is unknown. Updating the collector does not correct or modify past observations.

Public downloads are capped at 4,000 recent rows. Check coverage dates and truncated in JSON or the CSV headers before citing a full period. The existing exclusion of rows identified as interpolation during a 2026 outage is preserved.

API and Developer Use

We offer programmatic access to the current rate and historical data via REST endpoints. Data is served in JSON and updates at the same frequency as the website (as observations become available).

GET https://www.boliviablue.com/api/blue-rate

For current rate, history by range and full documentation:

How to Cite Bolivia Blue

When using our data in articles, reports or applications, include a clear attribution. Recommended format:

Source: Bolivia Blue, boliviablue.com, periodically updated.

Alternatives: "Bolivia Blue (boliviablue.com)" or "according to data from boliviablue.com".

Limitations and Transparency

Our data is based on public P2P information and represents an estimate of the parallel market in Bolivia. It does not constitute financial advice or an offer to buy or sell.

Users should verify current rates before making transactions. The actual price in a P2P transaction may vary depending on amount, payment method and counterparty.

If no platform returns a valid reference in a cycle, that update may be delayed until the next successful run.

Frequently Asked Questions