> ## Documentation Index > Fetch the complete documentation index at: https://developers.circle.com/llms.txt > Use this file to discover all available pages before exploring further. # Get Event Monitors > Fetch a list of event monitors, optionally filtered by blockchain, contract address, and event signature. ## OpenAPI ````yaml openapi/smart-contract-platform.yaml get /v1/w3s/contracts/monitors openapi: 3.0.3 info: description: This is the Circle Contracts API documentation. title: Circle Contracts version: '1.0' servers: - url: https://api.circle.com security: - BearerAuth: [] tags: - name: Templates - name: View / Update - name: Interact - name: Deploy / Import - name: Event Monitors paths: /v1/w3s/contracts/monitors: get: tags: - Event Monitors summary: Get Event Monitors description: >- Fetch a list of event monitors, optionally filtered by blockchain, contract address, and event signature. operationId: getEventMonitors parameters: - name: contractAddress description: Filter contracts by address. in: query schema: type: string - name: blockchain description: Filter by blockchain. in: query schema: $ref: '#/components/schemas/Blockchain' - name: eventSignature description: Filter monitors by event signature. in: query schema: type: string - $ref: '#/components/parameters/From' - $ref: '#/components/parameters/To' - $ref: '#/components/parameters/PageBefore' - $ref: '#/components/parameters/PageAfter' - $ref: '#/components/parameters/PageSize' - $ref: '#/components/parameters/XRequestId' responses: '200': content: application/json: schema: $ref: '#/components/schemas/EventMonitors' description: List of event monitors retrieved successfully. headers: X-Request-Id: $ref: '#/components/headers/XRequestId' Link: $ref: '#/components/headers/PaginationLink' '400': description: Invalid request parameters. headers: X-Request-Id: $ref: '#/components/headers/XRequestId' content: application/json: schema: $ref: '#/components/schemas/Error' security: - BearerAuth: [] components: schemas: Blockchain: type: string description: > The blockchain network that the resource is to be created on or is currently on. Required along with `sourceAddress` if you don't provide `walletId`. The `blockchain` and `walletId` fields are mutually exclusive. enum: - ETH - ETH-SEPOLIA - MATIC - MATIC-AMOY - ARB - ARB-SEPOLIA - UNI - UNI-SEPOLIA - BASE - BASE-SEPOLIA - OP - OP-SEPOLIA - AVAX - AVAX-FUJI - ARC-TESTNET - MONAD - MONAD-TESTNET example: MATIC-AMOY EventMonitors: title: EventMonitorResponse type: object required: - data properties: data: type: object required: - eventMonitors properties: eventMonitors: description: Event monitors that match criteria. type: array items: $ref: '#/components/schemas/EventMonitor' example: - id: e3c998a5-bdf1-4f3e-812f-24da238c0fff blockchain: ETH contractAddress: '0x6bc50ff08414717f000431558c0b585332c2a53d' eventSignature: >- Transfer(address indexed from, address indexed to, uint256 value) eventSignatureHash: >- 0xd3d3dd4b1fd3e53f94deb24e763485b4c925345c5abfa9ad529c67aa55a3b784 isEnabled: true createDate: '2023-01-01T12:00:00Z' updateDate: '2023-01-10T15:30:00Z' Error: title: Error type: object required: - code - message properties: code: type: integer description: Code that corresponds to the error. message: type: string description: Message that describes the error. XRequestId: type: string format: uuid description: >- A unique identifier, which can be helpful for identifying a request when communicating with Circle support. example: 2adba88e-9d63-44bc-b975-9b6ae3440dde EventMonitor: type: object required: - id - blockchain - contractAddress - eventSignature - eventSignatureHash - isEnabled - createDate - updateDate properties: id: type: string format: uuid example: e3c998a5-bdf1-4f3e-812f-24da238c0fff blockchain: allOf: - $ref: '#/components/schemas/Blockchain' contractAddress: $ref: '#/components/schemas/ContractAddress' eventSignature: type: string example: Transfer(address indexed from, address indexed to, uint256 value) eventSignatureHash: type: string example: '0xd3d3dd4b1fd3e53f94deb24e763485b4c925345c5abfa9ad529c67aa55a3b784' isEnabled: type: boolean example: true ContractAddress: type: string description: The on-chain address of this contract. example: '0x1e124d7384cd34448ea5907bd0052a79355ab5eb' parameters: From: name: from description: >- Queries items created since the specified date-time (inclusive) in ISO 8601 format. in: query schema: type: string format: date-time example: '2023-01-01T12:04:05Z' To: name: to description: >- Queries items created before the specified date-time (inclusive) in ISO 8601 format. in: query schema: type: string format: date-time example: '2023-01-01T12:04:05Z' PageBefore: name: pageBefore description: > A collection ID value used for pagination. It marks the exclusive end of a page. When provided, the collection resource will return the next n items before the id, with n being specified by pageSize. The items will be returned in the natural order of the collection. The resource will return the first page if neither pageAfter nor pageBefore are specified. SHOULD NOT be used in conjunction with pageAfter. in: query schema: type: string format: uuid PageAfter: name: pageAfter description: > A collection ID value used for pagination. It marks the exclusive begin of a page. When provided, the collection resource will return the next n items after the id, with n being specified by pageSize. The items will be returned in the natural order of the collection. The resource will return the first page if neither pageAfter nor pageBefore are specified. SHOULD NOT be used in conjunction with pageBefore. in: query schema: type: string format: uuid PageSize: name: pageSize description: > Limits the number of items to be returned. Some collections have a strict upper bound that will disregard this value. In case the specified value is higher than the allowed limit, the collection limit will be used. If avoided, the collection will determine the page size itself. in: query schema: type: integer default: 10 maximum: 50 minimum: 1 XRequestId: name: X-Request-Id in: header description: > Developer-provided identifier for this request, used for tracing requests in Wallets API logs and the Developer Console, and when communicating with Circle Support. **Must be a UUID to appear in logs.** Non-UUID values are accepted by the API but are ignored by logging and tracing systems. schema: $ref: '#/components/schemas/XRequestId' headers: XRequestId: description: > Developer-provided header parameter or Circle-generated universally unique identifier (UUID v4). Useful for identifying a specific request when communicating with Circle Support. schema: $ref: '#/components/schemas/XRequestId' PaginationLink: description: > Pagination cursor information. Format includes the following link relations: - self: URL pointing to the current page. - first: URL pointing to the first page. - next: URL pointing to the next page (omitted on the last page). - prev: URL pointing to the previous page (omitted on the first page). It's important to form calls with Link header values instead of constructing your own URLs. schema: type: string example: >- ; rel="next" securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: PREFIX:ID:SECRET description: >- Circle's API Keys are formatted in the following structure "PREFIX:ID:SECRET". All three parts are required to make a successful request. ````