Coincap OpenAPI

Name: Coincap OpenAPI API
Brand: CoinCap
Availability: InStock

✓ Official Vendor SpecFinanceBankingbearer9 EndpointsREST

For Agents

Retrieve live crypto asset prices, historical price series, market pairs, exchange data, and fiat conversion rates from a single REST API.

Quickstart

Get started with Coincap OpenAPI in minutes using your preferred integration method.

# Add to your MCP client config (Claude Desktop, Cursor, Windsurf)
{
  "jentic": {
    "url": "https://api.jentic.com/mcp",
    "auth": "oauth"
  }
}

# Then ask your agent:
"get current cryptocurrency asset price"

# → Jentic returns the GET /events tool with parameter schema, agent executes.

Capabilities

What an agent can do with Coincap OpenAPI API.

List ranked crypto assets with current prices, market caps, and supply figures

Look up a specific asset by slug to retrieve detailed metrics

Pull historical price series for an asset over a chosen interval

Browse the markets where a given asset trades and on which exchanges

GET STARTED

Start building with Coincap OpenAPI API

Explore with Jentic

View OpenAPI Document

Use for: Get the current price of bitcoin in USD, Retrieve the last 24 hours of price history for ethereum, List the top 100 cryptocurrencies by market capitalization, Find which exchanges trade solana and at what volume

Not supported: Does not handle wallet management, order placement, or on-chain transactions — use for cryptocurrency pricing and market data only.

Use Cases

Patterns agents use Coincap OpenAPI API for, with concrete tasks.

★ Lightweight Crypto Price Widget

Power a price ticker, dashboard widget, or mobile app card with live crypto pricing without paying for an enterprise data feed. CoinCap returns ranked assets with USD prices, market cap, supply, and 24-hour change in a single call. Integration takes well under an hour.

Call GET /v3/assets with a limit of 10 and return the top assets by rank with their priceUsd values

Historical Price Charting

Render a price history chart for any supported asset over minute, hour, or day intervals. The /v3/assets/{slug}/history endpoint returns time-series data ready for plotting. Suitable for portfolio apps, blogs, and educational tools.

Fetch hourly history for bitcoin over the past day via GET /v3/assets/bitcoin/history with interval=h1 and return the price points

Cross-Exchange Market Discovery

Discover where a specific cryptocurrency trades and at what volumes by listing the markets associated with the asset. Useful for arbitrage research, liquidity analysis, and routing trades to the best venue.

Call GET /v3/assets/ethereum/markets and return the top venues by 24-hour USD volume

AI Crypto Analyst via Jentic

Build an agent that answers ad-hoc crypto questions by combining live and historical CoinCap data through Jentic. The agent expresses an intent in natural language; Jentic routes it to the correct CoinCap endpoint and executes the call with stored credentials. Cost-effective for assistants that need basic crypto pricing without a heavy data subscription.

Through Jentic, fetch the current price and 24-hour change for bitcoin and summarise the move in one sentence

Key Endpoints

9 endpoints — coincap is a cryptocurrency market data api that aggregates real-time asset prices, exchange listings, market pairs, and conversion rates.

METHOD

PATH

DESCRIPTION

GET

/v3/assets

List ranked crypto assets with current market data

GET

/v3/assets/{slug}

Look up a specific asset by slug

GET

/v3/assets/{slug}/history

Retrieve historical price series for an asset

GET

/v3/assets/{slug}/markets

List markets where a given asset trades

GET

/v3/exchanges

List supported cryptocurrency exchanges

GET

/v3/rates

List conversion rates

GET

/v3/assets

List ranked crypto assets with current market data

GET

/v3/assets/{slug}

Look up a specific asset by slug

GET

/v3/assets/{slug}/history

Retrieve historical price series for an asset

GET

/v3/assets/{slug}/markets

List markets where a given asset trades

GET

/v3/exchanges

List supported cryptocurrency exchanges

Why though Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

CoinCap bearer tokens are stored encrypted in the Jentic vault. Agents receive scoped execution tokens — the raw bearer key never enters the agent's prompt or logs.

Intent-based discovery

Agents search Jentic by intent (e.g. get current bitcoin price) and Jentic returns the matching CoinCap operation with its parameter schema, so the agent calls the correct endpoint without browsing docs.

Time to first call

Direct integration: a few hours for auth, history pagination, and error handling. Through Jentic: under 30 minutes — search, load schema, execute.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Alternative

CoinGecko API

Broader free crypto data with deeper coverage of altcoins and DeFi tokens

Choose CoinGecko when you need broader coverage of long-tail tokens, DeFi metrics, or NFT data not on CoinCap

Alternative

CoinMarketCap API

Industry-standard rankings, listings, and market cap data

Choose CoinMarketCap when you need authoritative rankings, market cap, or listings data shown on widely cited dashboards

Alternative

CoinAPI Market Data REST API

Exchange-level granularity with OHLCV, trades, and order books

Choose CoinAPI when you need per-exchange OHLCV, trades, or order book data rather than aggregated pricing

FAQs

Specific to using Coincap OpenAPI API through Jentic.

What authentication does the CoinCap API use?

CoinCap v3 uses bearer token authentication — pass your API key in the Authorization header as Bearer {key}. Through Jentic, the key is stored in the encrypted vault and the agent receives a scoped execution token rather than the raw bearer string.

Can I retrieve historical price data with the CoinCap API?

Yes. GET /v3/assets/{slug}/history returns price points for a chosen asset over an interval such as m1, m5, h1, h2, h6, h12, or d1. Pair the interval with start and end timestamps to bound the range.

What are the rate limits for the CoinCap API?

Rate limits depend on the API key tier. The OpenAPI spec does not declare per-endpoint thresholds; check the tier attached to your CoinCap account. Free keys have lower throughput than paid tiers.

How do I look up a single asset price through Jentic?

Install the SDK with pip install jentic, search Jentic for get current crypto asset price, load the schema for GET /v3/assets/{slug}, and execute with the asset slug (for example bitcoin).

Does CoinCap return data for stablecoins and fiat currencies?

Stablecoins are listed in /v3/assets like any other crypto asset. Fiat conversion rates are exposed separately via /v3/rates and /v3/rates/{slug}, both quoted relative to USD.

Can I see which exchanges trade a specific cryptocurrency?

Yes. GET /v3/assets/{slug}/markets returns the trading pairs and exchanges where the asset is listed, along with per-market 24-hour USD volume — useful for liquidity and arbitrage analysis.