> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Pathfinder default API version change 0.19.0 | Starknet

> Pathfinder 0.19.0 changes the default Starknet JSON-RPC API at the root endpoint from v0.7.1 to v0.8.0. Learn how to verify and migrate safely.

<Warning>
  **Breaking change notice**

  With the roll-out of Pathfinder node version [0.19.0](https://github.com/eqlabs/pathfinder/releases/tag/v0.19.0), the default version of the JSON-RPC API served on the `/` path has changed to 0.8.0. Previously, the Starknet spec version served on the default endpoint was 0.7.1.
</Warning>

<Note>
  This page documents the 0.19.0 default change. A later upgrade, [Pathfinder 0.23.0](/reference/starknet-pathfinder-0-23-0-rpc-version-removal), removed versions 0.6, 0.7, and 0.8 and moved the default to 0.9. If your node runs 0.23.0 or later, the current default is 0.9 and versions 0.7 and 0.8 in the examples below are no longer available.
</Note>

This change affects how you interact with Starknet through the Pathfinder node if you're using the default endpoint without specifying a specific API version.

## What changed

The default JSON-RPC API version served on the root (`/`) endpoint has been updated:

* **Before upgrade**: Default endpoint served JSON-RPC API version 0.7.1
* **After upgrade**: Default endpoint now serves JSON-RPC API version 0.8.0

## Checking the current API version

You can verify which JSON-RPC API version is being served on your endpoint using the `starknet_specVersion` method:

```bash theme={"system"}
curl -X POST CHAINSTACK_STARKNET_PATHFINDER_ENDPOINT \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "starknet_specVersion",
    "params": [],
    "id": 1
  }'
```

## Accessing different API versions

Different JSON-RPC API spec versions are served over specific endpoints. You can access them by appending the version path to your Chainstack Starknet Pathfinder endpoint:

* **Version 0.7**: `CHAINSTACK_STARKNET_PATHFINDER_ENDPOINT/rpc/v0_7`
* **Version 0.8**: `CHAINSTACK_STARKNET_PATHFINDER_ENDPOINT/rpc/v0_8`
* **Version 0.9**: `CHAINSTACK_STARKNET_PATHFINDER_ENDPOINT/rpc/v0_9`

## Migration guide

### Continuing to use version 0.7.1

If your application requires the previous JSON-RPC API version 0.7.1, you can still access it by explicitly specifying the version in your endpoint URL:

**Before (using default endpoint):**

```bash theme={"system"}
curl -X POST CHAINSTACK_STARKNET_PATHFINDER_ENDPOINT \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "starknet_getBlockWithTxHashes",
    "params": {"block_id": "latest"},
    "id": 1
  }'
```

**After (explicitly using v0.7):**

```bash theme={"system"}
curl -X POST CHAINSTACK_STARKNET_PATHFINDER_ENDPOINT/rpc/v0_7 \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "starknet_getBlockWithTxHashes",
    "params": {"block_id": "latest"},
    "id": 1
  }'
```

### Using the new default (v0.8)

If you want to use the new default version 0.8.0, you can either:

1. Continue using the default endpoint (`/`) which now serves v0.8
2. Explicitly specify `/rpc/v0_8` for clarity

## Version differences

To understand the differences between the JSON-RPC API versions and what changes you might need to make to your application, refer to the official Starknet specifications:

* [Starknet Specs Releases](https://github.com/starkware-libs/starknet-specs/releases) - Complete changelog and differences between spec versions

## Best practices

1. **Always specify the API version explicitly** in production applications to avoid unexpected changes when defaults are updated
2. **Test your application** with the new API version before migrating
3. **Review the specification changes** to understand new features and breaking changes between versions

## Additional resources

* [Chainstack changelog: Starknet Pathfinder v0.19.0](/changelog/chainstack-updates-august-19-2025) - the dated release note for this change
* [Pathfinder GitHub repository](https://github.com/eqlabs/pathfinder) - Latest version information and updates
* [Starknet OpenRPC spec](https://github.com/starkware-libs/starknet-specs) - Complete API specification for all versions
* [Pathfinder v0.19.0 Release Notes](https://github.com/eqlabs/pathfinder/releases/tag/v0.19.0) - Detailed information about this release