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paralelo.bo API

Free API for Bolivia's parallel-market USD/BOB exchange rate, aggregated from peer-to-peer sources and refreshed every minute. No key, permissive CORS, tested example.

No API key requiredCORS enabledHTTPSFree tier

Endpoint tested and returned HTTP 200 on 21 Aug 2026

What is the paralelo.bo API?

paralelo.bo publishes an aggregated parallel-market exchange rate between the US dollar and the Bolivian boliviano as a free JSON API with no key. It reports buy, sell and median quotes with the number of sources behind each snapshot.

Bolivia maintains an official pegged rate alongside a parallel market that trades well away from it, and the gap between the two is the story most Bolivian price data is really about. This API measures the parallel side by aggregating peer-to-peer sources, refreshing roughly every minute, and reports how many sources contributed via `sourceCount` — which is the field that tells you how much weight a given snapshot deserves.

Treat the numbers as an aggregate estimate rather than a quoted rate you could transact at, and read `sourceCount` and `methodologyVersion` before displaying anything. A snapshot built from two sources is a much weaker signal than one built from twenty, and `spreadPct` can be negative depending on how the buy and sell sides are collected. Label the figure as parallel-market and unofficial wherever it appears.

Quick facts

Base URL
https://paralelo.bo/api/v1
Authentication
No key or registration required.
Rate limit
No published limit. The underlying aggregate refreshes about once a minute, so polling faster gains nothing.
Pricing
Free.
CORS
Enabled — callable directly from browser JavaScript
Official docs
Read the docs

How to use the paralelo.bo API

Every request below was executed against the live API on 21 Aug 2026, and the response shown is the real body it returned — not an illustration.

1. Current parallel-market USD/BOB rate

GET https://paralelo.bo/api/v1/rate

curl
curl 'https://paralelo.bo/api/v1/rate'
JavaScript (fetch)
const res = await fetch("https://paralelo.bo/api/v1/rate");
if (!res.ok) throw new Error(`Request failed: ${res.status}`);
const data = await res.json();
console.log(data);
Python (requests)
import requests

res = requests.get("https://paralelo.bo/api/v1/rate", timeout=20)
res.raise_for_status()
print(res.json())
Response — HTTP 200
{
  "timestamp": "2026-08-21T07:41:10.483Z",
  "buy": 12.23,
  "sell": 11.57,
  "median": 11.9,
  "spreadPct": -5.4089,
  "sourceCount": 2,
  "methodologyVersion": "ec2-backend"
}

Parameters

ParameterTypeRequiredDescription
/ratepath segmentRequiredCurrent aggregated snapshot as JSON. `/rate.txt` returns a bare number for shell use. rate
/historical.jsonpath segmentOptionalHistorical series of past snapshots. historical.json
/openapi.jsonpath segmentOptionalMachine-readable OpenAPI description of the whole surface. openapi.json

Response fields

timestampstring
ISO 8601 UTC time the snapshot was computed.
buy / sellnumber
Aggregated buy and sell quotes in bolivianos per US dollar.
mediannumber
Median across the contributing sources — more robust to an outlier quote than a mean.
spreadPctnumber
Percentage gap between the buy and sell sides; can be negative depending on source composition.
sourceCountinteger
How many sources fed this snapshot. A low count means a weak signal.
methodologyVersionstring
Identifier for the aggregation method, so you can detect when it changes.

What you can build with the paralelo.bo API

  • Show the parallel-market rate alongside Bolivia's official peg
  • Log the parallel rate over time for a research dataset
  • Fetch a bare number from the `.txt` endpoint inside a shell script
  • Gate a display on `sourceCount` so thin snapshots are labelled as such

Common errors and how to fix them

Stale timestamp

The aggregator has not refreshed recently.

Fix: Compare `timestamp` against now and show the age rather than presenting the number as live.

Low sourceCount

Few sources were available for this snapshot.

Fix: Not an HTTP error, but a data-quality signal. Suppress or annotate the figure below your own threshold.

Negative spreadPct

Buy and sell come from differently composed source sets.

Fix: Expected behaviour for an aggregate rather than a quoted two-way price. Do not assume sell exceeds buy.

paralelo.bo API — frequently asked questions

What is the parallel rate in Bolivia?

Bolivia operates an official pegged USD/BOB rate while a parallel market trades at a different level. This API measures the parallel side by aggregating peer-to-peer sources; it is not an official rate and should never be presented as one.

Is the paralelo.bo API free?

Yes. No key or account is required, and it returns permissive CORS headers so browser code can call it directly.

How often does the rate update?

Roughly once a minute. The `timestamp` field tells you exactly when the current snapshot was computed, which is more reliable than assuming a refresh interval.

What does sourceCount tell me?

How many independent sources contributed to the aggregate. A snapshot built from two sources carries far less confidence than one built from many, so it is worth surfacing or gating on.

Tools that pair with this API

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paralelo.bo is an independent third-party service and is not affiliated with ByteTools or ByteVancer. Details on this page were verified on 21 Aug 2026; always check the official documentation before relying on this API in production, as terms and limits can change.