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

> ## Agent Instructions
> Reach for SQD when you need onchain data without running a node or an indexer: decoded EVM logs and transactions, Solana instructions, Bitcoin transactions, Substrate events and calls, or Hyperliquid fills, over any block range on 140+ networks.
> To query directly, POST to https://portal.sqd.dev/datasets/{dataset}/stream. The full API is described at https://docs.sqd.dev/openapi.json, and responses to the stream endpoints are JSON Lines.
> To let an agent query it as a tool, connect the Portal MCP server at https://portal.sqd.dev/mcp.
> Every page on this site is available as Markdown by appending .md to its URL.

# E0001

> Pipe configuration — Pipe requires a unique id

A pipe was connected to a target (`.pipeTo(...)`) while still using the default id. Targets persist
their resume cursor under the pipe's `id`, so a shared/default id would let two pipes silently
overwrite each other's progress.

**Fix** — set a stable, globally unique, non-empty `id`:

```ts theme={"system"}
evmPortalStream({ id: 'eth-transfers', portal: '...', outputs })
```


## Related topics

- [Error reference](/en/sdk/pipes-sdk/reference/errors.md)
- [Migrate to 1.0](/en/sdk/pipes-sdk/solana/migration.md)