> ## Documentation Index > Fetch the complete documentation index at: https://docs.polygon.technology/llms.txt > Use this file to discover all available pages before exploring further. # List chains > Returns the chains the indexer covers, with their ID and name. ## OpenAPI ````yaml /api-reference/openapi.yaml post /v1/IndexerGateway/GetChains openapi: 3.0.3 info: title: Polygon OMS Public API version: v26.10.20-0001 description: >- Unified API for moving money between crypto and fiat. Three ways to move money: Transactions (instant, wallet or card funded, including Cash-In for in-person cash deposits), Deposit Addresses (reusable crypto deposit configurations), and Virtual Accounts (dedicated bank accounts that auto-convert fiat to crypto). Standard transactions follow a two-step flow: create a Quote (pricing), then create a Transaction (execution). Cash-in codes generate a one-time deposit code for in-person cash deposits at retail locations. contact: name: Polygon OMS url: https://oms.polygon.technology servers: - url: https://sandbox-api.polygon.technology/v0.13 description: Sandbox - url: https://api.polygon.technology/v0.13 description: Production security: - BearerAuth: [] tags: - name: Auth description: Authentication via OMS API key and secret - name: Customers description: Customer management and KYC - name: Customer - name: Wallet - name: Quote - name: Transaction - name: Transfer - name: CashIns - name: CashLocation - name: Sandbox - name: VirtualAccount - name: Counterparty - name: ExternalAccount - name: Reference - name: DepositAddress - name: Indexer description: >- Read token balances, prices, and transaction history across EVM networks, Solana, and Tron. Indexer methods are webRPC calls: each is a `POST` with a JSON body, served at `/v1/{Service}/{Method}` on the API host rather than under the `/v0.13` base path. Authenticate with a publishable key in the `Api-Key` header, or with a bearer token from `POST /auth/token`. paths: /v1/IndexerGateway/GetChains: servers: - url: https://sandbox-api.polygon.technology description: Sandbox - url: https://api.polygon.technology description: Production post: tags: - Indexer summary: List chains description: Returns the chains the indexer covers, with their ID and name. operationId: IndexerGateway-GetChains requestBody: content: application/json: schema: $ref: '#/components/schemas/IndexerGateway_GetChains_Request' responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/IndexerGateway_GetChains_Response' 4XX: description: Client error content: application/json: schema: oneOf: - $ref: '#/components/schemas/ErrorWebrpcEndpoint' - $ref: '#/components/schemas/ErrorWebrpcRequestFailed' - $ref: '#/components/schemas/ErrorWebrpcBadRoute' - $ref: '#/components/schemas/ErrorWebrpcBadMethod' - $ref: '#/components/schemas/ErrorWebrpcBadRequest' - $ref: '#/components/schemas/ErrorWebrpcClientAborted' - $ref: '#/components/schemas/ErrorWebrpcStreamLost' - $ref: '#/components/schemas/ErrorAborted' - $ref: '#/components/schemas/ErrorAccessKeyMismatch' - $ref: '#/components/schemas/ErrorAccessKeyNotFound' - $ref: '#/components/schemas/ErrorAtLeastOneKey' - $ref: '#/components/schemas/ErrorGeoblocked' - $ref: '#/components/schemas/ErrorInvalidArgument' - $ref: '#/components/schemas/ErrorInvalidOrigin' - $ref: '#/components/schemas/ErrorInvalidService' - $ref: '#/components/schemas/ErrorMaxAccessKeys' - $ref: '#/components/schemas/ErrorMetadataCallFailed' - $ref: '#/components/schemas/ErrorMethodNotFound' - $ref: '#/components/schemas/ErrorNoDefaultKey' - $ref: '#/components/schemas/ErrorNotFound' - $ref: '#/components/schemas/ErrorPermissionDenied' - $ref: '#/components/schemas/ErrorProjectNotFound' - $ref: '#/components/schemas/ErrorQueryFailed' - $ref: '#/components/schemas/ErrorQuotaExceeded' - $ref: '#/components/schemas/ErrorRateLimit' - $ref: '#/components/schemas/ErrorRateLimited' - $ref: '#/components/schemas/ErrorRequestConflict' - $ref: '#/components/schemas/ErrorResourceExhausted' - $ref: '#/components/schemas/ErrorSessionExpired' - $ref: '#/components/schemas/ErrorTimeout' - $ref: '#/components/schemas/ErrorUnauthorized' - $ref: '#/components/schemas/ErrorUnauthorizedUser' - $ref: '#/components/schemas/ErrorUnavailable' 5XX: description: Server error content: application/json: schema: oneOf: - $ref: '#/components/schemas/ErrorWebrpcBadResponse' - $ref: '#/components/schemas/ErrorWebrpcServerPanic' - $ref: '#/components/schemas/ErrorWebrpcInternalError' security: - PublishableKey: [] - BearerAuth: [] components: schemas: IndexerGateway_GetChains_Request: type: object properties: networkType: $ref: '#/components/schemas/NetworkType' IndexerGateway_GetChains_Response: type: object properties: chains: description: '[]ChainInfo' type: array items: $ref: '#/components/schemas/ChainInfo' ErrorWebrpcEndpoint: type: object properties: error: type: string example: WebrpcEndpoint code: type: number example: 0 msg: type: string example: endpoint error cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorWebrpcRequestFailed: type: object properties: error: type: string example: WebrpcRequestFailed code: type: number example: -1 msg: type: string example: request failed cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorWebrpcBadRoute: type: object properties: error: type: string example: WebrpcBadRoute code: type: number example: -2 msg: type: string example: bad route cause: type: string status: type: number example: 404 required: - error - code - msg - status ErrorWebrpcBadMethod: type: object properties: error: type: string example: WebrpcBadMethod code: type: number example: -3 msg: type: string example: bad method cause: type: string status: type: number example: 405 required: - error - code - msg - status ErrorWebrpcBadRequest: type: object properties: error: type: string example: WebrpcBadRequest code: type: number example: -4 msg: type: string example: bad request cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorWebrpcClientAborted: type: object properties: error: type: string example: WebrpcClientAborted code: type: number example: -8 msg: type: string example: request aborted by client cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorWebrpcStreamLost: type: object properties: error: type: string example: WebrpcStreamLost code: type: number example: -9 msg: type: string example: stream lost cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorAborted: type: object properties: error: type: string example: Aborted code: type: number example: 1005 msg: type: string example: Request aborted cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorAccessKeyMismatch: type: object properties: error: type: string example: AccessKeyMismatch code: type: number example: 1102 msg: type: string example: Access key mismatch cause: type: string status: type: number example: 409 required: - error - code - msg - status ErrorAccessKeyNotFound: type: object properties: error: type: string example: AccessKeyNotFound code: type: number example: 1101 msg: type: string example: Access key not found cause: type: string status: type: number example: 401 required: - error - code - msg - status ErrorAtLeastOneKey: type: object properties: error: type: string example: AtLeastOneKey code: type: number example: 1302 msg: type: string example: You need at least one Access Key cause: type: string status: type: number example: 403 required: - error - code - msg - status ErrorGeoblocked: type: object properties: error: type: string example: Geoblocked code: type: number example: 1006 msg: type: string example: Geoblocked region cause: type: string status: type: number example: 451 required: - error - code - msg - status ErrorInvalidArgument: type: object properties: error: type: string example: InvalidArgument code: type: number example: 2001 msg: type: string example: Invalid argument cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorInvalidOrigin: type: object properties: error: type: string example: InvalidOrigin code: type: number example: 1103 msg: type: string example: Invalid origin for Access Key cause: type: string status: type: number example: 403 required: - error - code - msg - status ErrorInvalidService: type: object properties: error: type: string example: InvalidService code: type: number example: 1104 msg: type: string example: Service not enabled for Access key cause: type: string status: type: number example: 403 required: - error - code - msg - status ErrorMaxAccessKeys: type: object properties: error: type: string example: MaxAccessKeys code: type: number example: 1301 msg: type: string example: Access keys limit reached cause: type: string status: type: number example: 403 required: - error - code - msg - status ErrorMetadataCallFailed: type: object properties: error: type: string example: MetadataCallFailed code: type: number example: 3003 msg: type: string example: Metadata service call failed cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorMethodNotFound: type: object properties: error: type: string example: MethodNotFound code: type: number example: 1003 msg: type: string example: Method not found cause: type: string status: type: number example: 404 required: - error - code - msg - status ErrorNoDefaultKey: type: object properties: error: type: string example: NoDefaultKey code: type: number example: 1300 msg: type: string example: No default access key found cause: type: string status: type: number example: 403 required: - error - code - msg - status ErrorNotFound: type: object properties: error: type: string example: NotFound code: type: number example: 3000 msg: type: string example: Resource not found cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorPermissionDenied: type: object properties: error: type: string example: PermissionDenied code: type: number example: 1001 msg: type: string example: Permission denied cause: type: string status: type: number example: 403 required: - error - code - msg - status ErrorProjectNotFound: type: object properties: error: type: string example: ProjectNotFound code: type: number example: 1100 msg: type: string example: Project not found cause: type: string status: type: number example: 401 required: - error - code - msg - status ErrorQueryFailed: type: object properties: error: type: string example: QueryFailed code: type: number example: 2003 msg: type: string example: Query failed cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorQuotaExceeded: type: object properties: error: type: string example: QuotaExceeded code: type: number example: 1200 msg: type: string example: Quota exceeded cause: type: string status: type: number example: 429 required: - error - code - msg - status ErrorRateLimit: type: object properties: error: type: string example: RateLimit code: type: number example: 1201 msg: type: string example: Rate limit exceeded cause: type: string status: type: number example: 429 required: - error - code - msg - status ErrorRateLimited: type: object properties: error: type: string example: RateLimited code: type: number example: 1007 msg: type: string example: Rate-limited. Please slow down. cause: type: string status: type: number example: 429 required: - error - code - msg - status ErrorRequestConflict: type: object properties: error: type: string example: RequestConflict code: type: number example: 1004 msg: type: string example: Conflict with target resource cause: type: string status: type: number example: 409 required: - error - code - msg - status ErrorResourceExhausted: type: object properties: error: type: string example: ResourceExhausted code: type: number example: 2004 msg: type: string example: Resource exhausted cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorSessionExpired: type: object properties: error: type: string example: SessionExpired code: type: number example: 1002 msg: type: string example: Session expired cause: type: string status: type: number example: 403 required: - error - code - msg - status ErrorTimeout: type: object properties: error: type: string example: Timeout code: type: number example: 1900 msg: type: string example: Request timed out cause: type: string status: type: number example: 408 required: - error - code - msg - status ErrorUnauthorized: type: object properties: error: type: string example: Unauthorized code: type: number example: 1000 msg: type: string example: Unauthorized access cause: type: string status: type: number example: 401 required: - error - code - msg - status ErrorUnauthorizedUser: type: object properties: error: type: string example: UnauthorizedUser code: type: number example: 1105 msg: type: string example: Unauthorized user cause: type: string status: type: number example: 403 required: - error - code - msg - status ErrorUnavailable: type: object properties: error: type: string example: Unavailable code: type: number example: 2002 msg: type: string example: Unavailable resource cause: type: string status: type: number example: 400 required: - error - code - msg - status ErrorWebrpcBadResponse: type: object properties: error: type: string example: WebrpcBadResponse code: type: number example: -5 msg: type: string example: bad response cause: type: string status: type: number example: 500 required: - error - code - msg - status ErrorWebrpcServerPanic: type: object properties: error: type: string example: WebrpcServerPanic code: type: number example: -6 msg: type: string example: server panic cause: type: string status: type: number example: 500 required: - error - code - msg - status ErrorWebrpcInternalError: type: object properties: error: type: string example: WebrpcInternalError code: type: number example: -7 msg: type: string example: internal error cause: type: string status: type: number example: 500 required: - error - code - msg - status NetworkType: description: Represented as uint8 on the server side type: string enum: - MAINNETS - TESTNETS - ALL ChainInfo: type: object properties: chainId: type: number chainName: type: string required: - chainId - chainName securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: JWT description: Token from POST /auth/token PublishableKey: type: apiKey in: header name: Api-Key ````