> ## Documentation Index > Fetch the complete documentation index at: https://docs.messari.io/llms.txt > Use this file to discover all available pages before exploring further. # List ETF Providers > Returns one row per crypto ETF issuer, with the issuer's latest values. An ETF provider is an asset manager running crypto exchange-traded products, and its id is its Blockworks Research provider slug (for example blackrock). Latest values are read from the most recent point in the last 30 days; an issuer that reported nothing in that window returns nulls and a null asOf. Sourced from Blockworks Research. ## OpenAPI ````yaml GET /metrics/v2/protocols/etfs openapi: 3.0.0 info: description: OpenAPI specification for the entire Messari API title: Messari API - Metrics V2 version: 1.0.0 servers: - description: Messari API url: https://api.messari.io security: [] paths: /metrics/v2/protocols/etfs: get: tags: - metrics/protocols/etfs summary: List ETF Providers description: >- Returns one row per crypto ETF issuer, with the issuer's latest values. An ETF provider is an asset manager running crypto exchange-traded products, and its id is its Blockworks Research provider slug (for example blackrock). Latest values are read from the most recent point in the last 30 days; an issuer that reported nothing in that window returns nulls and a null asOf. Sourced from Blockworks Research. operationId: getETFProviders parameters: - description: Page number (1-indexed) in: query name: page schema: format: int64 type: integer example: 1 default: 1 - description: Page size limit in: query name: limit schema: type: integer format: int64 example: 100 default: 100 - description: >- Column to sort by. Anything other than name or slug sorts on that metric's latest value; a row with no value for it always sorts last, in either direction. in: query name: sort schema: type: string enum: - name - slug - aum-usd - flow-usd - num-products - weighted-aum-expense-ratio - bitcoin-aum-perc - spot-aum-perc - rolling-30d-flow-usd - aum-30d-change-perc example: aum-usd default: aum-usd - description: Sort direction in: query name: order schema: type: string enum: - asc - desc example: desc default: desc - description: >- Match against the issuer's id, slug or name. Case-insensitive substring. in: query name: search schema: type: string example: blackrock responses: '200': content: application/json: schema: properties: data: $ref: '#/components/schemas/GetETFProvidersResponse' error: type: string required: - data type: object example: error: null data: data: - id: blackrock slug: blackrock name: BlackRock asOf: 1787270400 metrics: aumUsd: 69035555967 flowUsd: 776184468 numProducts: 8 weightedAumExpenseRatio: 0.002489769699759677 bitcoinAumPerc: 0.8771670448767953 spotAumPerc: 0.9989685136738227 rolling30dFlowUsd: 2278552478 aum30dChangePerc: 0.2604181259715074 - id: grayscale slug: grayscale name: Grayscale asOf: 1787270400 metrics: aumUsd: 19674093972 flowUsd: 9649610 numProducts: 17 weightedAumExpenseRatio: 0.010781808503369489 bitcoinAumPerc: 0.7534320894825499 spotAumPerc: 0.9988471478771892 rolling30dFlowUsd: 47624438 aum30dChangePerc: 0.2221210439264214 - id: fidelity slug: fidelity name: Fidelity asOf: 1787270400 metrics: aumUsd: 16333700368 flowUsd: 78555503 numProducts: 6 weightedAumExpenseRatio: 0.0026353644271711794 bitcoinAumPerc: 0.9127296812795311 spotAumPerc: 1 rolling30dFlowUsd: 217897331 aum30dChangePerc: 0.22125080250160287 - id: bitwise slug: bitwise-asset-management name: Bitwise Asset Management asOf: 1787270400 metrics: aumUsd: 7313252055 flowUsd: 58535177 numProducts: 29 weightedAumExpenseRatio: 0.005947079384849672 bitcoinAumPerc: 0.5376709484957031 spotAumPerc: 1 rolling30dFlowUsd: 127567875 aum30dChangePerc: 0.23493029064431553 - id: 21shares slug: 21shares name: 21Shares asOf: 1787270400 metrics: aumUsd: 6053211130 flowUsd: 14849115 numProducts: 71 weightedAumExpenseRatio: 0.009072870196929678 bitcoinAumPerc: 0.6343309095845133 spotAumPerc: 0.997981592788091 rolling30dFlowUsd: 87247089 aum30dChangePerc: 0.2302057140879824 metadata: pageSize: 100 page: 1 totalRows: 76 totalPages: 1 description: OK '400': content: application/json: schema: properties: data: {} error: type: string required: - data type: object description: Bad Request '401': content: application/json: schema: properties: data: {} error: type: string required: - data type: object description: Unauthorized '500': content: application/json: schema: properties: data: {} error: type: string required: - data type: object description: Internal Server Error security: - apiKey: [] components: schemas: GetETFProvidersResponse: type: object properties: data: type: array items: $ref: '#/components/schemas/ETFProvider' metadata: $ref: '#/components/schemas/SnapshotListingMetadata' required: - data - metadata ETFProvider: type: object properties: id: type: string description: >- The issuer's Blockworks Research provider slug, which is also its series key (for example blackrock). name: type: string description: Display name. slug: type: string description: >- Messari project slug of the issuer. An empty string where the issuer maps to no Messari project. asOf: format: int64 type: integer description: >- Unix timestamp (seconds) of the point the latest values were read from, or null where nothing was reported in the last 30 days. metrics: $ref: '#/components/schemas/ETFProviderMetrics' required: - id - name - slug - metrics SnapshotListingMetadata: properties: page: format: int64 type: integer description: Current page number pageSize: format: int64 type: integer description: Number of results per page totalPages: format: int64 type: integer description: Total number of pages totalRows: format: int64 type: integer description: Total number of rows required: - page - pageSize - totalPages - totalRows type: object description: Pagination metadata ETFProviderMetrics: type: object description: >- An issuer's latest values, read from its most recent point in the last 30 days. Every field is null where the issuer reported no value. Sourced from Blockworks Research. properties: aumUsd: format: double type: number description: >- Assets under management across the provider's crypto ETF products in USD.. Series slug `aum-usd`. flowUsd: format: double type: number description: >- Daily net flow across the provider's crypto ETF products in USD.. Series slug `flow-usd`. numProducts: format: double type: number description: >- Number of active products with positive AUM.. Series slug `num-products`. weightedAumExpenseRatio: format: double type: number description: >- AUM-weighted average expense ratio.. Series slug `weighted-aum-expense-ratio`. bitcoinAumPerc: format: double type: number description: >- Share of AUM in bitcoin products (0-1).. Series slug `bitcoin-aum-perc`. spotAumPerc: format: double type: number description: >- Share of AUM in delta-one (spot) products (0-1).. Series slug `spot-aum-perc`. rolling30dFlowUsd: format: double type: number description: Rolling 30-day net flow in USD.. Series slug `rolling-30d-flow-usd`. aum30dChangePerc: format: double type: number description: >- AUM change versus 30 days ago as a ratio.. Series slug `aum-30d-change-perc`. securitySchemes: apiKey: in: header name: X-Messari-API-Key type: apiKey ````