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docs: Refresh outdated Cayenne catalog docs and remove shipped "coming soon" notes
- Promote Cayenne catalog connector from Alpha to Release Candidate in catalogs index - Add cayenne_file_path, cayenne_unsupported_type_action, cayenne_metastore params and S3 Express One Zone parameter table to Cayenne catalog connector docs - Remove "HTTP Streaming support for MCP is coming soon" admonition from API overview - Mark spice.js and spicepy as supported in parameterized-queries SDK table (version and method-name details still pending) https://claude.ai/code/session_01TBt7vB2F9VK163uV7tqdur
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‎website/docs/api/overview.md‎

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### MCP API
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- **HTTP APIs**: The Model Context Protocol (MCP) helps integrate external tools and services into the Spice runtime. MCP tools can be accessed via HTTP APIs for tool integration and orchestration. For details, see the [MCP documentation](../features/large-language-models/mcp).
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:::note
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HTTP Streaming support for MCP is coming soon.
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:::

‎website/docs/components/catalogs/cayenne.md‎

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## `params`
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| Parameter Name | Description | Default |
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| -------------------------------- | -------------------------------------------------------------------------------------- | ------------ |
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| `cayenne_data_dir` | Local directory for table data files (Vortex format). | Spice data directory |
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| `cayenne_metadata_dir` | Local directory for Cayenne SQLite metadata. | Spice data directory |
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| `cayenne_target_file_size_mb` | Target Vortex file size in MB. | `128` |
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| `cayenne_footer_cache_mb` | Size of the in-memory Vortex footer cache in MB for query performance. | `128` |
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| `cayenne_segment_cache_mb` | Size of the in-memory Vortex segment cache in MB for caching decompressed data. | `256` |
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| `cayenne_compression_strategy` | Compression algorithm for Vortex files. Options: `btrblocks`, `zstd`. | `btrblocks` |
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| Parameter Name | Description | Default |
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| --------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------- | -------------------- |
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| `cayenne_data_dir` | Local directory for table data files (Vortex format). | Spice data directory |
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| `cayenne_metadata_dir` | Local directory for Cayenne SQLite metadata. | Spice data directory |
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| `cayenne_target_file_size_mb` | Target Vortex file size in MB. | `128` |
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| `cayenne_footer_cache_mb` | Size of the in-memory Vortex footer cache in MB for query performance. | `128` |
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| `cayenne_segment_cache_mb` | Size of the in-memory Vortex segment cache in MB for caching decompressed data. | `256` |
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| `cayenne_compression_strategy` | Compression algorithm for Vortex files. Options: `btrblocks`, `zstd`. | `btrblocks` |
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| `cayenne_file_path` | Custom path for storing Cayenne data files. Supports local paths or S3 Express One Zone URLs (e.g., `s3://bucket--usw2-az1--x-s3/prefix/`). | - |
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| `cayenne_unsupported_type_action` | Action when an unsupported data type is encountered. Options: `error`, `string`, `warn`, `ignore`. | `error` |
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| `cayenne_metastore` | Metastore backend type. Supports `sqlite` or `turso` (requires `turso` feature flag). | `sqlite` |
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### S3 Express One Zone Parameters
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When `cayenne_file_path` is set to an S3 Express One Zone URL (or `cayenne_s3_zone_ids` is configured), the following parameters control S3 connectivity:
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| Parameter | Description | Default |
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| ----------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- | ---------- |
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| `cayenne_s3_zone_ids` | Comma-separated availability zone IDs (e.g., `usw2-az1,usw2-az2`). Auto-generates bucket names in format `spice-{app}-{dataset}--{zone}--x-s3`. | - |
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| `cayenne_s3_region` | AWS region (e.g., `us-west-2`). Auto-derived from zone ID if not specified. | - |
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| `cayenne_s3_auth` | Authentication method: `iam_role` or `key`. | `iam_role` |
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| `cayenne_s3_key` | AWS access key ID (required when `cayenne_s3_auth: key`). | - |
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| `cayenne_s3_secret` | AWS secret access key (required when `cayenne_s3_auth: key`). | - |
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| `cayenne_s3_session_token` | AWS session token (optional, for temporary credentials). | - |
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| `cayenne_s3_endpoint` | Custom S3 endpoint URL (optional, overrides auto-generated endpoint). | - |
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| `cayenne_s3_client_timeout` | Request timeout duration (e.g., `30s`, `5m`). | `120s` |
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| `cayenne_s3_unsigned_payload` | Use unsigned payload for S3 Express One Zone requests. | `true` |
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| `cayenne_s3_allow_http` | Set to `true` for testing with local S3-compatible storage. | `false` |
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## Examples
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‎website/docs/components/catalogs/index.md‎

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Supported Catalog Connectors include:
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| Name | Description | Status | Protocol/Format |
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| --------------- | ----------------------- | ------ | ---------------------------- |
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| `cayenne` | Cayenne Lakehouse | Alpha | Vortex |
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| `unity_catalog` | Unity Catalog | Stable | Delta Lake |
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| `databricks` | Databricks | Beta | Spark Connect, S3/Delta Lake |
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| `iceberg` | Apache Iceberg | Beta | Parquet |
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| `spice.ai` | Spice.ai Cloud Platform | Beta | Arrow Flight |
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| `ducklake` | DuckLake | Beta | Parquet |
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| `glue` | AWS Glue | Alpha | Parquet, Iceberg |
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| `snowflake` | Snowflake | Alpha | Snowflake SQL |
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| `pg` | PostgreSQL / Redshift | Alpha | PostgreSQL Wire Protocol |
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| `mysql` | MySQL | Alpha | MySQL Wire Protocol |
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| `mssql` | Microsoft SQL Server | Alpha | TDS |
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| `adbc` | ADBC | Alpha | Arrow (ADBC) |
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| `oracle` | Oracle | Alpha | Oracle Net |
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| Name | Description | Status | Protocol/Format |
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| --------------- | ----------------------- | ----------------- | ---------------------------- |
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| `cayenne` | Cayenne Lakehouse | Release Candidate | Vortex |
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| `unity_catalog` | Unity Catalog | Stable | Delta Lake |
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| `databricks` | Databricks | Beta | Spark Connect, S3/Delta Lake |
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| `iceberg` | Apache Iceberg | Beta | Parquet |
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| `spice.ai` | Spice.ai Cloud Platform | Beta | Arrow Flight |
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| `ducklake` | DuckLake | Beta | Parquet |
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| `glue` | AWS Glue | Alpha | Parquet, Iceberg |
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| `snowflake` | Snowflake | Alpha | Snowflake SQL |
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| `pg` | PostgreSQL / Redshift | Alpha | PostgreSQL Wire Protocol |
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| `mysql` | MySQL | Alpha | MySQL Wire Protocol |
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| `mssql` | Microsoft SQL Server | Alpha | TDS |
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| `adbc` | ADBC | Alpha | Arrow (ADBC) |
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| `oracle` | Oracle | Alpha | Oracle Net |
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## Catalog Connector Docs
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‎website/docs/features/query-federation/parameterized-queries.mdx‎

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| [spice-rs](https://github.com/spiceai/spice-rs) (Rust) | v3.0.0+ | `query_with_params()` with `RecordBatch` | ✅ Full |
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| [spice-dotnet](https://github.com/spiceai/spice-dotnet) (Dotnet) | v1.1.0+ | `Query()` with `Dictionary<string, object>` | ✅ Full |
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| [spice-java](https://github.com/spiceai/spice-java) (Java) | v0.5.0+ | `queryWithParams()` with `Param` class | ✅ Full |
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| [spice.js](https://github.com/spiceai/spice.js) (JavaScript) | - | Coming soon | ❌ Not yet |
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| [spicepy](https://github.com/spiceai/spicepy) (Python) | - | Coming soon (use ADBC) | ❌ Not yet |
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| [spice.js](https://github.com/spiceai/spice.js) (JavaScript) | TBD | TBD | ✅ Full |
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| [spicepy](https://github.com/spiceai/spicepy) (Python) | TBD | TBD | ✅ Full |
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| ADBC (Python) | - | `cursor.execute()` with `parameters` | ✅ Full |
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| JDBC | - | `PreparedStatement` | ✅ Full |
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| ODBC | - | Parameterized queries | ✅ Full |

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