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POST
/
proxy
/
sim
Simulate proxy payment request
curl --request POST \
  --url https://api.httpayer.com/proxy/sim \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "api_url": "https://www.x402.org/protected",
  "method": "GET",
  "payload": {},
  "data": {},
  "params": {},
  "headers": {}
}
'
{
  "scheme": "exact",
  "network": "base",
  "payTo": "<string>",
  "asset": "<string>",
  "maxAmountRequired": "<string>",
  "resource": "<string>",
  "description": "<string>",
  "mimeType": "application/json",
  "maxTimeoutSeconds": 180
}

Authorizations

​
x-api-key
string
header
required

API key for authentication

Body

application/json
​
api_url
string
required

Target API URL to simulate payment for

Example:

"https://www.x402.org/protected"

​
method
enum<string>
required

HTTP method

Available options:
GET,
POST,
PUT,
DELETE,
PATCH
Example:

"GET"

​
payload
object

Request body data

​
data
object

Alternative request body data

​
params
object

Query parameters

​
headers
object

Custom headers to send to target API (e.g., API keys, authorization tokens)

Response

Payment requirements returned successfully

​
scheme
string
Example:

"exact"

​
network
string
Example:

"base"

​
payTo
string

Recipient address

​
asset
string

Token contract address

​
maxAmountRequired
string

Amount in microUSDC

​
resource
string

Resource URL

​
description
string
​
mimeType
string
Example:

"application/json"

​
maxTimeoutSeconds
number
Example:

180