Fast Fill - Relay

Documentation Index

Fetch the complete documentation index at: /llms.txt

Use this file to discover all available pages before exploring further.

cURL

curl --request POST \
  --url https://api.relay.link/fast-fill \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <x-api-key>' \
  --data '
{
  "requestId": "<string>"
}
'

const options = {
  method: 'POST',
  headers: {'x-api-key': '<x-api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({requestId: '<string>'})
};

fetch('https://api.relay.link/fast-fill', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.relay.link/fast-fill"

payload = { "requestId": "<string>" }
headers = {
    "x-api-key": "<x-api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

Status Codes

• 200: Request successfully queued for fast fill.
• 400: Currency is required and could not be determined.
• 401: Unauthorized: Check API Key.
• 403: Forbidden: Fast fill requires a sponsoring wallet with app balance.
• 404: Request not found.
• 409: Conflict: This request is already being processed.
• 500: An internal server error occurred.

Response Examples

{
  "message": "Request successfully queued for fast fill."
}

{
  "message": "Currency is required and could not be determined."
}

{
  "message": "Unauthorized: Check API Key"
}

{
  "message": "Forbidden: Fast fill requires a sponsoring wallet with app balance."
}

{
  "message": "Request not found"
}

{
  "message": "Conflict: This request is already being processed."
}

{
  "message": "An internal server error occurred."
}

Headers

• x-api-key:
  Type: string
  Required: Yes
  Description: Required API key for authentication. Contact the team for getting an API Key

Body

• requestId:
  Type: string
  Required: Yes
  Description: The request ID of the request that needs to be fast filled
• solverInputCurrencyAmount:
  Type: string
  Description: The input currency amount that the solver receives on origin
• maxFillAmountUsd:
  Type: number
  Description: Optional per-request USD limit. If the computed fill value exceeds this amount, the request is rejected. Must be lower than or equal to the app's available USDC balance.

Response

• 200:

  • Type: application/json

  • Description: Request was successful. It was either queued or found to be already executed.

  • Example:

    {
      "message": "Request successfully queued for fast fill."
    }