Official vendor OpenAPI document · agent-readyData EnrichmentData TransformationapiKey5 EndpointsREST
For Agents
Fetch latest, historical, and date-range FX rates and convert currency amounts via CurrencyAPI. Useful for AI agents that price multi-currency carts, generate financial reports, or normalise transactional data.
Use for: Get the latest USD to EUR exchange rate, I want to convert 100 GBP to JPY at today's rate, Retrieve the EUR to USD rate on 2024-12-31, Get exchange rates for a date range to chart trend
Not supported: Does not handle FX execution, hedging, or money movement - use for CurrencyAPI exchange-rate lookups and currency listing only.
CurrencyAPI provides reliable foreign exchange and currency conversion data through a small, focused REST surface. Endpoints return latest exchange rates, historical rates for a specified date, rates for a date range, the list of supported currencies, and account status. Responses are JSON with rates expressed against a chosen base currency. Authentication uses the apikey query parameter, making it straightforward to call from server-side jobs, spreadsheets, or AI agents that price products or convert balances.
Install Jentic One Beta
Connect the CurrencyAPI to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the CurrencyAPI, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fcurrencyapi.com%2Fcurrencyapi" | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fcurrencyapi.com%2Fcurrencyapi" | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
Capabilities
What an agent can do with CurrencyAPI API.
Fetch latest exchange rates for a base currency via GET /latest
Look up historical exchange rates for a specified date via GET /historical
Pull a range of historical rates between two dates via GET /range
List supported fiat and crypto currencies via GET /currencies
Check account status, plan, and quota via GET /status
Use Cases
Patterns agents use CurrencyAPI API for, with concrete tasks.
★ Multi-Currency Checkout Pricing
An e-commerce agent serving global customers can call /latest with the store's base currency and convert displayed prices on the fly. Cache rates per currency for an hour or a day depending on volatility tolerance, and call /currencies to render a supported-currency picker. The result is accurate cart pricing without writing FX logic in the storefront.
Call GET /latest with base_currency=USD and currencies=EUR,GBP,JPY then multiply cart totals by the returned rates.
Financial Reporting and Reconciliation
A finance team can use /historical and /range to convert past transactions to a reporting currency on the date they occurred. The API supports specifying a base currency and target list, so the agent can produce period-over-period reports that respect spot rates rather than current rates. Cache historical rates indefinitely because they do not change.
Call GET /historical with date=2024-12-31 and base_currency=USD to value year-end EUR balances in USD.
FX Rate Trend Charting
An analytics dashboard can render exchange-rate charts using GET /range to retrieve the rate for each day in a window. Pair with /currencies to populate currency selectors and /status to show plan usage so the team can budget API calls.
Call GET /range with datetime_start and datetime_end covering the last 90 days for base_currency=USD and currencies=EUR.
AI Agent Integration via Jentic
An AI assistant that handles money can use Jentic to discover CurrencyAPI rather than embedding the apikey query parameter in code. The agent searches for an intent like 'get the latest USD to EUR exchange rate', loads the schema, and runs the call against the credentials Jentic stores.
Use Jentic search for 'get the latest exchange rate' and execute the matching GET /latest operation with base_currency=USD.
Key Endpoints
5 endpoints — currencyapi provides reliable foreign exchange and currency conversion data through a small, focused rest surface.
METHOD
PATH
DESCRIPTION
GET
/latest
Get latest exchange rates
GET
/historical
Get exchange rates for a specific past date
GET
/range
Get exchange rates for a date range
GET
/currencies
List supported currencies
GET
/status
Get API account status
GET
/latest
Get latest exchange rates
GET
/historical
Get exchange rates for a specific past date
GET
/range
Get exchange rates for a date range
GET
/currencies
List supported currencies
GET
/status
Get API account status
Jentic AI Readiness Score
This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use.
C
CurrencyAPI
- Foundational (D+)48/100
93
Foundational Compliance63
Developer Experience & Jentic Compatibility48
AI-Readiness & Agent Experience94
Agent Usability15
Security100
AI DiscoverabilityPowered by JenticScoring Framework 1.0.0 | Scoring Engine 0.4.0
Show dimension breakdown
93
Foundational Compliance
Base layer of spec validity and structural soundness.
Grade: A+Signals: 4
99%
Lint Results
Aggregated quality score from linter diagnostics, weighted by severity.
100%
Resolution Completeness
Percentage of `$ref` references that resolve successfully.
100%
Specification Validity
Checks whether the API description parses successfully and conforms to its declared specification (e.g., OpenAPI).
75%
Structural Integrity
Structural correctness score based on schema issues using logarithmic dampening.
63
Developer Experience & Jentic Compatibility
Clarity, completeness, and ingestion readiness for developers and tooling.
Grade: B-Signals: 4
0%
Example Density
How richly the API is illustrated with examples.
100%
Example Validity
Percentage of examples that conform to their schemas.
50%
Response Coverage
Percentage of operations with complete response definitions (success, client error, server error).
100%
Tooling Readiness
Health of API ingestion, bundling, and resolution within Jentic pipelines.
48
AI-Readiness & Agent Experience
Semantic breadth, depth, and agent comprehension for AI systems.
Grade: D+Signals: 4
43%
Description Coverage
Coverage of descriptions across API elements.
0%
Error Standardization
Coverage of RFC 9457 Problem Details for error responses.
100%
OperationId Quality
Coverage, uniqueness, and casing consistency of operationIds for AI inference.
50%
Summary Coverage
Coverage of summaries across operations/tags/info.
94
Agent Usability
Functional utility, complexity comfort, and AI orchestration readiness.
Grade: A+Signals: 1
94%
Complexity Comfort
Agent comfort level based on API operational and structural complexity.
15
Security
Trust, risk posture, and security compliance.
Grade: FSignals: 1
15%
Authentication Strength
Average quality of security schemes based on authentication method strength (weakest link for OAuth2).
100
AI Discoverability
Findability, semantic richness, and reasoning readiness.
Grade: A+Signals: 1
100%
Descriptive Richness
Clarity and depth of descriptions across API elements.
Score it yourself
Every API in the directory is allowlisted, so you can re-score it with no key required.
npx @jentic/api-scorecard-cli score <openapi-url>Why Jentic?
What agents get from Jentic-routed access to this vendor.
Setup
Wiring CurrencyAPI by hand means appending the apikey query parameter to every request, targeting the api.currencyapi.com/v3 host, and handling retries around rate lookups yourself. Through Jentic you install once, import CurrencyAPI from the API Directory, store the API key once, and your agent calls it.
Permission scoping
This surface is read-only, with currencies and dates passed as query parameters rather than an id in the URL path, so limit the agent to the operations it needs, such as latest or historical rate lookups. You choose which of those read operations are in scope.
Credential isolation
Your CurrencyAPI key is stored once, encrypted, by your own Jentic One instance and injected at execution time. It never enters the agent's prompt, logs, or context.
Intent-based discovery
Agents search Jentic by intent such as 'get the latest exchange rate', and Jentic returns the matching CurrencyAPI operation with its input schema so the agent calls the right endpoint without browsing the reference docs.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using CurrencyAPI API through Jentic.
What authentication does the CurrencyAPI use?
CurrencyAPI uses an API key passed as the apikey query parameter on every request. Through Jentic the key is stored in your encrypted Jentic One instance and added to the request URL at execution time so it never appears in the agent's prompt or logs.
Can I get historical exchange rates with CurrencyAPI?
Yes. Call GET /historical with a date parameter to retrieve the rates as of that date. For a series of dates use GET /range with datetime_start and datetime_end to pull a continuous window in one request.
What are the rate limits for CurrencyAPI?
Rate limits depend on the plan attached to your API key, with a free tier and several paid tiers. Call GET /status to read the current account quota and remaining calls before running a large historical pull.
How do I convert currency at the latest rate using CurrencyAPI through Jentic?
Run pip install jentic, search Jentic for 'get the latest exchange rate', load the schema for GET /latest, and execute it with base_currency and the target currencies. Multiply the amount you want to convert by the returned rate to get the converted value.
Which currencies does CurrencyAPI support?
CurrencyAPI covers a wide list of fiat currencies and a selection of cryptocurrencies. Call GET /currencies to fetch the full machine-readable list, including ISO codes and human-readable names, before building a currency picker.
Is CurrencyAPI free?
CurrencyAPI offers a free tier suitable for low-volume use and several paid tiers with higher quotas, historical access, and faster updates. Pricing details are on currencyapi.com rather than in the OpenAPI spec.
Can I limit what my agent is allowed to do with the CurrencyAPI?
Yes. Because you run Jentic One yourself, your own rules decide which CurrencyAPI operations and credentials the agent may use. CurrencyAPI is a read-only surface, so you can grant only the calls the agent needs, such as GET /latest for current rates while withholding GET /historical, GET /range, GET /currencies, or GET /status. Since currencies and dates are passed as query parameters rather than in the URL path, the agent only ever reaches the specific read operations you put in scope.
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