> ## Documentation Index > Fetch the complete documentation index at: https://docs.halliday.xyz/llms.txt > Use this file to discover all available pages before exploring further. # Get supported chains > Get a list of all supported blockchain networks with their configuration details. ## OpenAPI ````yaml /public/openapi.yaml get /chains openapi: 3.1.0 info: title: Halliday API V2 description: > API V2 for Halliday's payment infrastructure, supporting onramps, swaps, and offramps. This API provides a unified interface for cryptocurrency payments, allowing developers to: - Quote payments across multiple providers - Execute payments with onramps, swaps, and offramps - Track payment status and history ## Authentication API key authentication is required for all endpoints. version: 2.0.0 contact: name: Contact Halliday url: https://halliday.xyz email: support@halliday.xyz servers: - url: https://v2.prod.halliday.xyz description: Base domain security: - ApiKeyAuth: [] tags: - name: Chains description: Blockchain network information and configuration - name: Assets description: Asset information, discovery, and supported asset pairs - name: Payments description: >- Core payment operations including quotes, confirmation, and status tracking - name: Webhooks description: > Register HTTPS endpoints to receive signed notifications when a workflow reaches a terminal state, instead of polling for status. You subscribe to one or more event types per webhook. | Event type | Fires when a workflow's status becomes | | --- | --- | | `WORKFLOW_COMPLETED` | `COMPLETE` | | `WORKFLOW_FAILED` | `FAILED` | All management endpoints live under `/orgs/webhooks` and authenticate with a secret API key (passed as a bearer token) that has webhook access. Publishable keys cannot manage webhooks. **Integration checklist** - Receiver is a public HTTPS endpoint (no private IPs). - Save the `signing_secret` when you create the webhook — it is shown only once. - Verify `X-Halliday-Signature` against the raw body, accepting any of its comma-separated signatures. - Respond `2xx` quickly and do the real work afterward. - Skip deliveries whose `id` you have already handled. paths: /chains: get: tags: - Chains summary: Get supported chains description: > Get a list of all supported blockchain networks with their configuration details. operationId: getChains responses: '200': description: List of supported chains content: application/json: schema: type: object additionalProperties: $ref: '#/components/schemas/ChainInfo' example: ethereum: chain_id: \#: 1 network: ethereum native_currency: name: Ether symbol: ETH decimals: 18 is_testnet: false explorer: https://etherscan.io/ image: ... rpc: ... arbitrum: chain_id: \#: 42161 network: arbitrum native_currency: name: Ether symbol: ETH decimals: 18 is_testnet: false explorer: https://arbiscan.io/ image: ... rpc: ... '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: errors: - kind: other message: Invalid API key '403': description: Forbidden content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: errors: - kind: other message: Insufficient permissions to access this resource components: schemas: ChainInfo: type: object required: - chain_id - network - address_family - is_testnet properties: chain_id: type: object description: Chain ID for the network example: \#: 1 network: type: string description: Network name example: ethereum address_family: type: string description: Address family for the chain enum: - EVM - SOL - BTC - TON - TRON - ALEO - DOGE - LTC - XRPL example: EVM native_currency: type: object properties: name: type: string example: Ether symbol: type: string example: ETH decimals: type: number example: 18 required: - name - symbol - decimals is_testnet: type: boolean description: Whether this is a testnet example: false explorer: type: string format: uri description: Block explorer URL example: https://etherscan.io image: type: string format: uri description: Chain logo URL rpc: type: string format: uri description: RPC endpoint URL ErrorResponse: type: object required: - errors properties: errors: type: array items: $ref: '#/components/schemas/Issue' description: Error response for known errors Issue: oneOf: - $ref: '#/components/schemas/AmountIssue' - $ref: '#/components/schemas/AmountDownstreamIssue' - $ref: '#/components/schemas/FundingIssue' - $ref: '#/components/schemas/OwnerIssue' - $ref: '#/components/schemas/GeolocationIssue' - $ref: '#/components/schemas/ProviderIssue' - $ref: '#/components/schemas/PayinMethodIssue' - $ref: '#/components/schemas/OtherIssue' - $ref: '#/components/schemas/UnknownIssue' discriminator: propertyName: kind AmountIssue: type: object required: - kind - asset - given - limits - source - message - reason properties: kind: type: string enum: - amount asset: $ref: '#/components/schemas/Asset' given: $ref: '#/components/schemas/Amount' limits: $ref: '#/components/schemas/Limits' downstream_limits: $ref: '#/components/schemas/Limits' source: type: string message: type: string reason: type: string enum: - TOO_LOW - TOO_HIGH - NO_VALID_AMOUNT - UNKNOWN AmountDownstreamIssue: type: object required: - kind - asset - given - limits - source - message - reason properties: kind: type: string enum: - amount-downstream asset: $ref: '#/components/schemas/Asset' given: $ref: '#/components/schemas/Amount' limits: $ref: '#/components/schemas/Limits' downstream_limits: $ref: '#/components/schemas/Limits' source: type: string message: type: string reason: type: string enum: - TOO_LOW - TOO_HIGH - NO_VALID_AMOUNT - UNKNOWN FundingIssue: type: object required: - kind - token - balance properties: kind: type: string enum: - funding token: $ref: '#/components/schemas/Token' balance: type: string description: Current token balance at the funding address. OwnerIssue: type: object required: - kind - message - mitigation properties: kind: type: string enum: - owner message: type: string mitigation: type: string enum: - change - verify GeolocationIssue: type: object required: - kind - message properties: kind: type: string enum: - geolocation message: type: string ProviderIssue: type: object required: - kind - message properties: kind: type: string enum: - provider message: type: string PayinMethodIssue: type: object required: - kind - message properties: kind: type: string enum: - payin_method message: type: string OtherIssue: type: object required: - kind - message properties: kind: type: string enum: - other message: type: string UnknownIssue: type: object required: - kind - message properties: kind: type: string enum: - unknown message: type: string Asset: type: string description: >- Identifier in the token format ("chain:address") or fiat currency code ("USD") example: ethereum:0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 Amount: type: string description: A decimal amount string. Limits: type: object properties: min: type: string description: Minimum amount as a decimal string. max: type: string description: Maximum amount as a decimal string. Token: type: string description: Token identifier in the format "chain:address" pattern: ^[a-z]+:0x[a-fA-F0-9]+$ example: ethereum:0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 securitySchemes: ApiKeyAuth: type: http scheme: bearer bearerFormat: API_KEY ````