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POST
/
v1
/
wallets
/
{wallet_id}
/
swap
Swap Tokens
curl --request POST \
  --url https://api.privy.io/v1/wallets/{wallet_id}/swap \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --header 'privy-app-id: <privy-app-id>' \
  --data '
{
  "base_amount": "1000000000000000000",
  "amount_type": "exact_input",
  "source": {
    "asset_address": "native",
    "caip2": "eip155:1"
  },
  "destination": {
    "asset_address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "caip2": "eip155:1"
  },
  "slippage_bps": 50
}
'
{
  "id": "cm7oxq1el000e11o8iwp7d0d0",
  "status": "pending",
  "wallet_id": "fmfdj6yqly31huorjqzq38zc",
  "caip2": "eip155:1",
  "input_token": "native",
  "output_token": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  "input_amount": "1000000000000000000"
}

​
Prerequisites

Privy automates token approvals and transaction submission. The response is a wallet action that starts in pending status and can be polled for confirmation.

Authorizations

​
Authorization
string
header
required

Basic Auth header with your app ID as the username and your app secret as the password.

Headers

​
privy-app-id
string
required

ID of your Privy app.

​
privy-authorization-signature
string

Request authorization signature. If multiple signatures are required, they should be comma separated.

​
privy-idempotency-key
string

Idempotency keys ensure API requests are executed only once within a 24-hour window.

Path Parameters

​
wallet_id
string
required

ID of the wallet.

Body

application/json

Input for executing a token swap.

​
base_amount
string
required

Amount in base units (e.g., wei for ETH). Must be a non-negative integer string.

Required string length: 1 - 78
Pattern: ^\d+$
​
source
SwapSource · object
required

The input side of a swap request, including token and chain.

​
destination
SwapDestination · object
required

The output side of a swap execution request.

​
amount_type
enum<string>
default:exact_input

Whether the amount refers to the input token (exact_input) or output token (exact_output).

Available options:
exact_input,
exact_output
​
slippage_bps
integer

Maximum slippage tolerance in basis points (e.g., 50 for 0.5%).

Required range: 0 <= x <= 10000
​
fee_configuration
FeeConfiguration · object

Optional fee configuration for the swap. If omitted, cross-chain swaps only charge provider fees.

Example:
{ "type": "total_fee_bps", "value": 50 }

Response

200 - application/json

Swap initiated successfully.

Response for a swap action.

​
id
string
required

The ID of the wallet action.

​
status
enum<string>
required

The current status of the wallet action.

Available options:
pending,
succeeded,
rejected,
failed
​
wallet_id
string
required

The ID of the wallet involved in the action.

​
created_at
string<date-time>
required

ISO 8601 timestamp of when the wallet action was created.

​
type
enum<string>
required
Available options:
swap
​
caip2
string
required

CAIP-2 chain identifier for the swap.

​
input_token
string
required

Token address or "native" for the token being sold.

​
output_token
string
required

Token address or "native" for the token being bought.

​
input_amount
string | null
required

Exact base-unit amount of input token. Populated after on-chain confirmation.

​
output_amount
string | null
required

Exact base-unit amount of output token. Populated after on-chain confirmation.

​
failure_reason
FailureReason · object

Top-level failure context for the wallet action. Present on rejected or failed actions when available.

​
steps
(EVMTransactionWalletActionStep · object | EVMUserOperationWalletActionStep · object | SVMTransactionWalletActionStep · object | ExternalTransactionWalletActionStep · object)[]

The steps of the wallet action. Only returned if ?include=steps is provided.

A wallet action step consisting of an EVM transaction.

​
destination_caip2
string

Destination chain CAIP-2 identifier. Present for cross-chain swaps.

​
estimated_fees
(RelayerFee · object | PrivyFee · object | DeveloperFee · object)[]

Estimated fee breakdown from the provider quote.

Estimated fee paid to the relayer.

Example:
{
  "type": "privy",
  "recipient": "0x1234567890abcdef1234567890abcdef12345678",
  "amount": "0.20"
}
​
estimated_gas
Gas · object

Estimated source-chain gas cost from the provider quote.

Example:
{
  "base_amount": "100000000000000",
  "amount": "0.0001",
  "gas_asset": "ETH"
}
​
fees
(RelayerFee · object | PrivyFee · object | DeveloperFee · object)[]

Actual fees paid for the swap. Populated after on-chain confirmation.

Estimated fee paid to the relayer.

Example:
{
  "type": "privy",
  "recipient": "0x1234567890abcdef1234567890abcdef12345678",
  "amount": "0.20"
}
​
gas
Gas · object

Actual source-chain gas cost. Populated after on-chain confirmation.

Example:
{
  "base_amount": "100000000000000",
  "amount": "0.0001",
  "gas_asset": "ETH"
}