> ## Documentation Index > Fetch the complete documentation index at: https://docs.cryptorank.io/llms.txt > Use this file to discover all available pages before exploring further. # Most Active Investors > Returns the top investors by activity over the selected period: number of rounds participated in and, of those, how many as lead. Returns up to 50 funds.

Available from: Advanced
Cost: 1 credit per request Activity is counted within the selected period only. ## OpenAPI ````yaml https://api.cryptorank.io/v3/documentation-json get /v3/funding-rounds/most-active-investors openapi: 3.0.0 info: title: Cryptorank API V3 description: > # Overview Cryptorank Public API v3 — comprehensive cryptocurrency data for B2B clients and partners. Useful Links: - [API Plans](https://cryptorank.io/public-api) - [Dashboard](https://cryptorank.io/public-api/dashboard) # Getting Started Primary Server URL: [https://api.cryptorank.io/v3/](https://api.cryptorank.io/v3/) **Authentication** Generate an API key in the [dashboard](https://cryptorank.io/public-api/dashboard) and pass it in the `X-Api-Key` header. Keep your keys secret — never commit them to public repositories or expose them in client-side code. version: 3.0.0 contact: name: Cryptorank Team url: https://cryptorank.io email: info@cryptorank.io servers: - url: https://api.cryptorank.io security: [] tags: [] paths: /v3/funding-rounds/most-active-investors: get: tags: - Funding Rounds summary: Most Active Investors description: >- **Description** Returns the top investors by activity over the selected period: number of rounds participated in and, of those, how many as lead. Returns up to 50 funds. > **Note:** Activity is counted within the selected period only. **Access** - Available from: **Advanced** - Cost: 1 credit per request operationId: FundingRoundsController_getMostActiveInvestors parameters: - name: period required: false in: query description: >- Activity period over which a fund’s rounds are counted. `all` removes the lower bound. schema: default: 90d type: string enum: - 30d - 90d - 180d - 1y - all - name: sortBy required: false in: query description: Sort field. schema: default: investments type: string enum: - investments - leadInvestments - name: sortOrder required: false in: query description: Sort direction. schema: default: desc type: string enum: - asc - desc responses: '200': description: '' content: application/json: schema: type: object required: - data - status properties: data: type: array items: $ref: '#/components/schemas/FundingRoundsMostActiveInvestorDto' status: $ref: '#/components/schemas/ResponseStatusDto' '400': description: Request validation failed content: application/json: schema: type: object required: - error properties: error: type: object required: - code - message - status properties: code: type: string enum: - VALIDATION_ERROR example: VALIDATION_ERROR message: type: string example: Validation failed status: type: number example: 400 '401': description: API key is missing or invalid content: application/json: schema: type: object required: - error properties: error: type: object required: - code - message - status properties: code: type: string enum: - API_KEY_MISSING - API_KEY_INVALID example: API_KEY_MISSING message: type: string example: API key is missing status: type: number example: 401 '403': description: >- No active subscription, the endpoint is not available in your plan, or the request goes beyond what your plan allows content: application/json: schema: type: object required: - error properties: error: type: object required: - code - message - status properties: code: type: string enum: - NO_ACTIVE_SUBSCRIPTION - ENDPOINT_NOT_AVAILABLE - PLAN_LIMIT_EXCEEDED example: NO_ACTIVE_SUBSCRIPTION message: type: string example: No active subscription found status: type: number example: 403 '429': description: Rate limit or credit limit exceeded content: application/json: schema: type: object required: - error properties: error: type: object required: - code - message - status properties: code: type: string enum: - RATE_LIMIT_EXCEEDED - DAILY_CREDITS_EXCEEDED - MONTHLY_CREDITS_EXCEEDED example: RATE_LIMIT_EXCEEDED message: type: string example: Rate limit exceeded status: type: number example: 429 '500': description: Internal server error content: application/json: schema: type: object required: - error properties: error: type: object required: - code - message - status properties: code: type: string enum: - INTERNAL_ERROR example: INTERNAL_ERROR message: type: string example: Internal server error status: type: number example: 500 security: - X-Api-Key: [] components: schemas: FundingRoundsMostActiveInvestorDto: type: object properties: id: type: number example: 42 description: Fund identifier. slug: type: string example: a16z-crypto description: URL-friendly fund slug. name: type: string example: a16z crypto description: Fund display name. imageUrl: type: string nullable: true example: >- https://images.cryptorank.io/funds/150x150.a16z-crypto1524754012028.png description: Fund logo URL, 150×150. Null when no image is available. tier: type: number example: 1 nullable: true description: >- Fund tier by CryptoRank classification (Tier 1 = top, descending). Null when unranked. totalInvestments: type: number example: 124 description: >- Number of funding rounds the fund participated in within the selected period (any role — lead or follow-on). leadInvestments: type: number example: 37 description: >- Number of funding rounds the fund led within the selected period (subset of `totalInvestments`). totalDeployed: type: string example: '5800000000' description: >- Sum of `raised` (USD) across all funding rounds the fund participated in within the selected period. Aggregates the full round size — the underlying data does not record per-investor check sizes. Rounds with an undisclosed `raised` amount contribute `0`. required: - id - slug - name - imageUrl - tier - totalInvestments - leadInvestments - totalDeployed ResponseStatusDto: type: object properties: usedCredits: type: number example: 1 description: Credits charged for this request timestamp: type: number example: 1780000000000 description: Server time of the response. Unix timestamp in milliseconds required: - usedCredits - timestamp securitySchemes: X-Api-Key: name: X-Api-Key type: apiKey in: header ````