> ## Documentation Index > Fetch the complete documentation index at: https://docs.kraken.com/llms.txt > Use this file to discover all available pages before exploring further. # List assets > Returns the catalog of supported assets, including currency code, display metadata, network, and which actions (deposit, withdraw, transfer, stake) are available for each asset. No authentication is required. **Rate limit:** 200 requests per 30 seconds per IP. ## OpenAPI ````yaml /openapi/insto-custody-rest.yaml get /v0/insto/custody/public/assets openapi: 3.0.0 info: title: Insto Custody External REST API version: 1.0.0 description: '' servers: - url: https://api.kraken.com description: Production Server security: - API-Key: [] API-Sign: [] tags: - name: Custody External API - name: apiFormat:kraken2025 paths: /v0/insto/custody/public/assets: get: tags: - Custody External API - apiFormat:kraken2025 summary: List assets description: >- Returns the catalog of supported assets, including currency code, display metadata, network, and which actions (deposit, withdraw, transfer, stake) are available for each asset. No authentication is required. **Rate limit:** 200 requests per 30 seconds per IP. operationId: getV0InstoCustodyPublicAssets responses: '200': description: >- Catalog of supported assets, with currency code, display metadata, and supported actions. content: application/json: schema: type: object properties: result: type: array items: type: object properties: name: type: string description: >- Localized asset name (e.g. `Bitcoin`, `Ethereum`, `US Dollar`). example: Bitcoin asset: type: string description: Asset currency code (e.g. `BTC`, `ETH`, `USD`). example: BTC asset_class: type: string description: >- Asset class label, one of: `currency`, `equity`, `nft`, `tokenized_asset`, `futures_contract`. example: currency symbol: type: string description: >- Visual symbol or glyph for the asset (e.g. `$`). Empty when the catalog has no glyph. example: ₿ decimals: type: integer format: int32 description: >- Number of decimal places used to record amounts of the asset. example: 8 display_decimals: type: integer format: int32 description: >- Number of decimal places shown when displaying amounts in a UI. example: 5 withdraw: type: boolean description: Whether the asset supports withdrawal. example: true deposit: type: boolean description: Whether the asset supports deposit. example: true transfer_to_spot: type: boolean description: >- Whether the asset can be transferred from a custody vault to a spot account. example: true transfer_to_vault: type: boolean description: >- Whether the asset can be transferred from a spot account to a custody vault. example: true stake: type: boolean description: Whether the asset supports staking. example: false network: type: string description: >- Blockchain network name (e.g. `Bitcoin`, `Ethereum`, `Solana`). Omitted for non-crypto assets. example: Bitcoin full_name: type: string description: >- Localized asset name followed by the asset code in parentheses (e.g. `Bitcoin (BTC)`). example: Bitcoin (BTC) required: - name - asset - asset_class - symbol - decimals - display_decimals - withdraw - deposit - transfer_to_spot - transfer_to_vault - stake - full_name required: - result '500': description: >- Internal Server Error. An unhandled exception occurred while serving the request. content: application/problem+json: schema: oneOf: - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/ReadUpstream example: tag:kraken.com,2025:gateway/ReadUpstream status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Failed to read response from upstream service. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/ReadUpstream example: tag:kraken.com,2025:gateway/ReadUpstream status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Failed to read response from upstream service. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/ReadUpstream example: tag:kraken.com,2025:gateway/ReadUpstream status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Failed to read response from upstream service. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/WriteResponse example: tag:kraken.com,2025:gateway/WriteResponse status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Failed to write response to client. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/Connect example: tag:kraken.com,2025:gateway/Connect status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Failed to connect to upstream service. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/ReadUpstream example: tag:kraken.com,2025:gateway/ReadUpstream status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Failed to read response from upstream service. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/ReadUpstream example: tag:kraken.com,2025:gateway/ReadUpstream status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Failed to read response from upstream service. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/ReadUpstream example: tag:kraken.com,2025:gateway/ReadUpstream status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Failed to read response from upstream service. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/WriteResponse example: tag:kraken.com,2025:gateway/WriteResponse status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Failed to write response to client. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/Fatal example: tag:kraken.com,2025:gateway/Fatal status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: Fatal error in gateway processing. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type - description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:Unknown example: tag:kraken.com,2025:Unknown status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 500 title: description: Short human-readable summary type: string example: Internal Server Error detail: nullable: true description: Help to solve the problem type: string example: An unexpected error occurred. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: type: object properties: message: type: string description: >- Human-readable description of the underlying failure. example: unexpected error processing request core_error: type: string description: Identifier for the originating error. example: core_error_unknown required: - message - core_error required: - data - status - title - type '503': description: >- Service Unavailable. The upstream custody service could not be reached. content: application/problem+json: schema: description: >- Type for errors when using the Kraken2025 format. This format follows `Problem Details for HTTP APIs` ([rfc7807]). [rfc7807]: https://datatracker.ietf.org/doc/html/rfc7807 type: object properties: type: description: >- URL uniquely identifying the error type relative to an operation type: string enum: - tag:kraken.com,2025:gateway/Connect example: tag:kraken.com,2025:gateway/Connect status: description: HTTP status (provided for convenience) type: integer format: uint16 minimum: 0 example: 503 title: description: Short human-readable summary type: string example: Service Unavailable detail: nullable: true description: Help to solve the problem type: string example: >- Downstream custody service is temporarily unreachable; retry with backoff. instance: nullable: true description: Link to debug data for this particular error type: string example: https://debug.kraken.com/req/01HXYZ data: description: Custom data attached to this problem required: - data - status - title - type components: {} ````