Get a preflight
curl --request GET \
--url https://api.useselo.xyz/v1/preflight/{preflightId}const options = {method: 'GET'};
fetch('https://api.useselo.xyz/v1/preflight/{preflightId}', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));import requests
url = "https://api.useselo.xyz/v1/preflight/{preflightId}"
response = requests.get(url)
print(response.text){
"eligible": true,
"preflightId": "pfl_…",
"target": {
"url": "https://api.example.com/v1/orders",
"method": "POST",
"priceUsdc": "0.01"
},
"estimatedMaxSpendUsdc": "0.01",
"seloPriceUsdc": "1.00",
"expiresAt": "2026-10-26T12:15:00.000Z"
}
Endpoints
Get a preflight
Read a stored preflight, eligible or not, with status 200. The response is not re-evaluated: compare expiresAt with the current time before paying.
GET
/
v1
/
preflight
/
{preflightId}
Get a preflight
curl --request GET \
--url https://api.useselo.xyz/v1/preflight/{preflightId}const options = {method: 'GET'};
fetch('https://api.useselo.xyz/v1/preflight/{preflightId}', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));import requests
url = "https://api.useselo.xyz/v1/preflight/{preflightId}"
response = requests.get(url)
print(response.text){
"eligible": true,
"preflightId": "pfl_…",
"target": {
"url": "https://api.example.com/v1/orders",
"method": "POST",
"priceUsdc": "0.01"
},
"estimatedMaxSpendUsdc": "0.01",
"seloPriceUsdc": "1.00",
"expiresAt": "2026-10-26T12:15:00.000Z"
}
Path Parameters
Preflight ID returned by POST /v1/preflight. A value that is not a well-formed ID returns 404.
Pattern:
^pfl_[0-9A-HJKMNP-TV-Z]{26}$Response
The stored preflight.
- Option 1
- Option 2
The target can be tested. Pass preflightId to POST /v1/release-test before expiresAt.
pfl_ plus 26 Crockford base32 characters.
Show child attributes
Show child attributes
What Selo expects to pay the target: one paid request at the target's price.
Pattern:
^[0-9]+\.[0-9]{2,6}$What the release test costs you, paid to Selo over x402.
Pattern:
^[0-9]+\.[0-9]{2,6}$The preflight is valid for 15 minutes.