Validate a Credential
curl --request POST \
--url https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate \
--header 'Authorization: Bearer <token>' \
--header 'checkfu-beta: <checkfu-beta>' \
--header 'checkfu-version: <checkfu-version>'import requests
url = "https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate"
headers = {
"checkfu-version": "<checkfu-version>",
"checkfu-beta": "<checkfu-beta>",
"Authorization": "Bearer <token>"
}
response = requests.post(url, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'checkfu-version': '<checkfu-version>',
'checkfu-beta': '<checkfu-beta>',
Authorization: 'Bearer <token>'
}
};
fetch('https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"checkfu-beta: <checkfu-beta>",
"checkfu-version: <checkfu-version>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate"
req, _ := http.NewRequest("POST", url, nil)
req.Header.Add("checkfu-version", "<checkfu-version>")
req.Header.Add("checkfu-beta", "<checkfu-beta>")
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate")
.header("checkfu-version", "<checkfu-version>")
.header("checkfu-beta", "<checkfu-beta>")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["checkfu-beta"] = '<checkfu-beta>'
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"credential_id": "<string>",
"has_refresh_token": true,
"mcp_probe": {
"http_response": {
"body": "<string>",
"body_truncated": true,
"content_type": "<string>",
"status_code": 123
},
"method": "<string>"
},
"refresh": {
"http_response": {
"body": "<string>",
"body_truncated": true,
"content_type": "<string>",
"status_code": 123
},
"status": "succeeded"
},
"status": "valid",
"type": "vault_credential_validation",
"validated_at": "<string>",
"vault_id": "<string>"
}{
"error": {
"type": "validation.malformed",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-malformed"
}
}{
"error": {
"type": "auth.invalid_key",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-invalid-key"
}
}{
"error": {
"type": "auth.disabled_tenancy",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-disabled-tenancy"
}
}{
"error": {
"type": "validation.not_found",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-not-found"
}
}{
"error": {
"type": "validation.conflict",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-conflict"
}
}{
"error": {
"type": "budget.exceeded",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#budget-exceeded"
}
}{
"error": {
"type": "runtime.internal",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#runtime-internal"
}
}Validate a Credential
Live-probes an MCP OAuth Credential, including its configured refresh flow, and returns the CMA vault_credential_validation result with bounded, scrubbed failure details.
Checkfu support posture: alpha; hosted. Required evidence journey: connection-lifecycle. Deployment-specific readiness and the latest proven release are available from GET /v1/support/capabilities.
POST
/
v1
/
vaults
/
{vault_id}
/
credentials
/
{credential_id}
/
mcp_oauth_validate
Validate a Credential
curl --request POST \
--url https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate \
--header 'Authorization: Bearer <token>' \
--header 'checkfu-beta: <checkfu-beta>' \
--header 'checkfu-version: <checkfu-version>'import requests
url = "https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate"
headers = {
"checkfu-version": "<checkfu-version>",
"checkfu-beta": "<checkfu-beta>",
"Authorization": "Bearer <token>"
}
response = requests.post(url, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'checkfu-version': '<checkfu-version>',
'checkfu-beta': '<checkfu-beta>',
Authorization: 'Bearer <token>'
}
};
fetch('https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"checkfu-beta: <checkfu-beta>",
"checkfu-version: <checkfu-version>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate"
req, _ := http.NewRequest("POST", url, nil)
req.Header.Add("checkfu-version", "<checkfu-version>")
req.Header.Add("checkfu-beta", "<checkfu-beta>")
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate")
.header("checkfu-version", "<checkfu-version>")
.header("checkfu-beta", "<checkfu-beta>")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.checkfu.com/v1/vaults/{vault_id}/credentials/{credential_id}/mcp_oauth_validate")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["checkfu-beta"] = '<checkfu-beta>'
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"credential_id": "<string>",
"has_refresh_token": true,
"mcp_probe": {
"http_response": {
"body": "<string>",
"body_truncated": true,
"content_type": "<string>",
"status_code": 123
},
"method": "<string>"
},
"refresh": {
"http_response": {
"body": "<string>",
"body_truncated": true,
"content_type": "<string>",
"status_code": 123
},
"status": "succeeded"
},
"status": "valid",
"type": "vault_credential_validation",
"validated_at": "<string>",
"vault_id": "<string>"
}{
"error": {
"type": "validation.malformed",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-malformed"
}
}{
"error": {
"type": "auth.invalid_key",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-invalid-key"
}
}{
"error": {
"type": "auth.disabled_tenancy",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-disabled-tenancy"
}
}{
"error": {
"type": "validation.not_found",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-not-found"
}
}{
"error": {
"type": "validation.conflict",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-conflict"
}
}{
"error": {
"type": "budget.exceeded",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#budget-exceeded"
}
}{
"error": {
"type": "runtime.internal",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#runtime-internal"
}
}Authorizations
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Headers
Available options:
2026-08-27 Path Parameters
Pattern:
^vlt_[0-9a-f]{32}$Pattern:
^vcrd_[0-9a-f]{32}$Response
Result of live-probing a Credential against its configured MCP server.
Result of live-probing a Credential against its configured MCP server.
Pattern:
^vcrd_[0-9a-f]{32}$The failing step of an MCP validation probe.
Show child attributes
Show child attributes
Outcome of a refresh-token exchange attempted during Credential validation.
Show child attributes
Show child attributes
Available options:
valid, invalid, unknown Available options:
vault_credential_validation A canonical UTC ISO-8601 timestamp with millisecond precision.
Maximum string length:
24Pattern:
^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$Pattern:
^vlt_[0-9a-f]{32}$