# Exchange Rate Data Streams
Source: https://docs.chain.link/data-streams/exchange-rate-streams

> For the complete documentation index, see [llms.txt](/llms.txt).

## Full datasets

Use the network index to retrieve feed addresses:

/data-feeds/feed-addresses/default.txt

Each network has its own dataset.
Do not load multiple networks unless required.

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## Example (Ethereum Mainnet)

| Feed Name | Proxy Address                                | Deviation | Heartbeat |
| --------- | -------------------------------------------- | --------- | --------- |
| ETH / USD | `0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419` | 0.5%      | 1h        |