> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tender.cash/llms.txt
> Use this file to discover all available pages before exploring further.

# Fetch On-ramp Chains

> List blockchain networks available for on-ramp delivery

<Note>
  **Auth method: Signed (HMAC)** — this endpoint requires the full set of signed
  headers: `x-access-id`, `x-request-id`, `x-timestamp`, and an HMAC-SHA256
  `authorization` signature. See [Authentication](/api-reference/authentication#signed-hmac-authentication).
</Note>

## Headers

<ParamField header="authorization" type="string" required>
  Base64-encoded HMAC-SHA256 signature using your API secret
</ParamField>

<ParamField header="x-timestamp" type="string" required>
  **Example:** `"2025-03-15T09:45:53.000Z"`
</ParamField>

<ParamField header="x-request-id" type="string" required>
  **Example:** `"550e8400-e29b-41d4-a716-446655440000"`
</ParamField>

<ParamField header="x-access-id" type="string" required>
  **Example:** `"your-access-id-here"`
</ParamField>

## Response

<ResponseField name="status" type="string" required>
  **Example:** `"success"`
</ResponseField>

<ResponseField name="message" type="string" required>
  **Example:** `"success"`
</ResponseField>

<ResponseField name="data" type="array" required>
  Array of supported chains

  <Expandable title="chain object">
    <ResponseField name="id" type="string">
      Chain identifier — use as `targetChain` in Initiate On-ramp

      **Example:** `"tron"`
    </ResponseField>

    <ResponseField name="name" type="string">
      **Example:** `"Tron"`
    </ResponseField>

    <ResponseField name="icon" type="string">
      **Example:** `"https://cdn.tender.cash/chains/tron.png"`
    </ResponseField>

    <ResponseField name="chainType" type="string">
      **Example:** `"tron"`
    </ResponseField>

    <ResponseField name="explorer" type="string">
      **Example:** `"https://tronscan.org"`
    </ResponseField>

    <ResponseField name="status" type="string">
      **Example:** `"active"`
    </ResponseField>
  </Expandable>
</ResponseField>


## OpenAPI

````yaml GET /v1/api/onramp/chains
openapi: 3.1.0
info:
  title: Tender API
  description: Tender Developer API for cryptocurrency payments and agent management
  version: 1.0.0
  contact:
    name: Tender Support
    url: https://tender.cash
servers:
  - url: https://secureapi.tender.cash
    description: Production Server
  - url: https://sandbox-api.tender.cash
    description: Sandbox Server
security:
  - SignedAuth: []
tags:
  - name: Agents
    description: Manage agents and sub-businesses
  - name: Transactions
    description: Payment and transaction operations
  - name: System
    description: System information and configuration
  - name: Webhooks
    description: Webhook management and logs
  - name: On-ramp
    description: Fiat-to-crypto on-ramp operations
  - name: Payouts
    description: Send crypto from merchant balance to a wallet address or payout account
  - name: Subwallets
    description: Provision and manage crypto wallet infrastructure for your end-users
paths:
  /v1/api/onramp/chains:
    get:
      tags:
        - On-ramp
      summary: Fetch On-ramp Chains
      description: List active blockchain networks available for on-ramp delivery.
      operationId: fetchOnrampChains
      parameters:
        - name: authorization
          in: header
          required: true
          schema:
            type: string
        - name: x-timestamp
          in: header
          required: true
          schema:
            type: string
            format: date-time
        - name: x-request-id
          in: header
          required: true
          schema:
            type: string
            format: uuid
        - name: x-access-id
          in: header
          required: true
          schema:
            type: string
      responses:
        '200':
          description: List of on-ramp chains
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                  message:
                    type: string
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/OnrampChain'
              example:
                status: success
                message: success
                data:
                  - id: tron
                    name: Tron
                    icon: https://cdn.tender.cash/chains/tron.png
                    chainType: tron
                    explorer: https://tronscan.org
                    status: active
      security:
        - SignedAuth: []
components:
  schemas:
    OnrampChain:
      type: object
      properties:
        id:
          type: string
          example: tron
        name:
          type: string
          example: Tron
        icon:
          type: string
        chainType:
          type: string
          example: tron
        explorer:
          type: string
          example: https://tronscan.org
        status:
          type: string
          example: active
  securitySchemes:
    SignedAuth:
      type: apiKey
      in: header
      name: authorization
      description: >-
        Signed (HMAC) authentication. Required headers: x-access-id,
        x-request-id (UUID v4), x-timestamp (ISO 8601), and authorization
        (Base64 HMAC-SHA256 signature of {timeStamp, requestId, accessId} using
        your access secret).

````