Get card session
curl --request GET \
--url https://api.natural.com/card-sessions/{sessionId} \
--header 'Authorization: Bearer <token>'import requests
url = "https://api.natural.com/card-sessions/{sessionId}"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://api.natural.com/card-sessions/{sessionId}', 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.natural.com/card-sessions/{sessionId}",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>"
],
]);
$response = curl_exec($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.natural.com/card-sessions/{sessionId}"
req, _ := http.NewRequest("GET", url, nil)
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.get("https://api.natural.com/card-sessions/{sessionId}")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.natural.com/card-sessions/{sessionId}")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"sessionId": "csn_01a0e6466ba3713bba0f0d9d36803b92",
"cardId": "eac_01a0e642ed4873d685273ce0e7d1ccab",
"cardSource": "external",
"status": "approved",
"allowedHosts": [
"api.stripe.com"
],
"claimExpiresAt": "2026-09-29T18:10:00.000Z",
"claimedAt": null,
"credentialExpiresAt": null,
"createdAt": "2026-09-29T18:00:00.000Z"
}{
"errors": [
{
"code": "invalid_value",
"detail": "The information you entered isn't valid. Please check it and try again.",
"status": "400",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "unauthenticated",
"detail": "Authentication is required.",
"status": "401",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "forbidden",
"detail": "You do not have permission to perform this action.",
"status": "403",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "not_found",
"detail": "The requested resource was not found.",
"status": "404",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "conflict",
"detail": "The request conflicts with the current resource state.",
"status": "409",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "invalid_value",
"detail": "Too big: expected string to have <=80 characters",
"status": "422",
"source": {
"pointer": "/data/attributes/description"
},
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "mfa_required",
"detail": "MFA verification required",
"status": "428",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "rate_limited",
"detail": "Too many requests. Please try again later.",
"status": "429",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "server_error",
"detail": "Something went wrong.",
"status": "500",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "not_implemented",
"detail": "This operation is not available.",
"status": "501",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "bad_gateway",
"detail": "We couldn't complete that request because one of Natural's services returned an unexpected response. Please try again.",
"status": "502",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "service_unavailable",
"detail": "The service is temporarily unavailable.",
"status": "503",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}User-saved cards
Get card session
Get a card session’s status. It never includes card data.
GET
/
card-sessions
/
{sessionId}
Get card session
curl --request GET \
--url https://api.natural.com/card-sessions/{sessionId} \
--header 'Authorization: Bearer <token>'import requests
url = "https://api.natural.com/card-sessions/{sessionId}"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://api.natural.com/card-sessions/{sessionId}', 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.natural.com/card-sessions/{sessionId}",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>"
],
]);
$response = curl_exec($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.natural.com/card-sessions/{sessionId}"
req, _ := http.NewRequest("GET", url, nil)
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.get("https://api.natural.com/card-sessions/{sessionId}")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.natural.com/card-sessions/{sessionId}")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"sessionId": "csn_01a0e6466ba3713bba0f0d9d36803b92",
"cardId": "eac_01a0e642ed4873d685273ce0e7d1ccab",
"cardSource": "external",
"status": "approved",
"allowedHosts": [
"api.stripe.com"
],
"claimExpiresAt": "2026-09-29T18:10:00.000Z",
"claimedAt": null,
"credentialExpiresAt": null,
"createdAt": "2026-09-29T18:00:00.000Z"
}{
"errors": [
{
"code": "invalid_value",
"detail": "The information you entered isn't valid. Please check it and try again.",
"status": "400",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "unauthenticated",
"detail": "Authentication is required.",
"status": "401",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "forbidden",
"detail": "You do not have permission to perform this action.",
"status": "403",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "not_found",
"detail": "The requested resource was not found.",
"status": "404",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "conflict",
"detail": "The request conflicts with the current resource state.",
"status": "409",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "invalid_value",
"detail": "Too big: expected string to have <=80 characters",
"status": "422",
"source": {
"pointer": "/data/attributes/description"
},
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "mfa_required",
"detail": "MFA verification required",
"status": "428",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "rate_limited",
"detail": "Too many requests. Please try again later.",
"status": "429",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "server_error",
"detail": "Something went wrong.",
"status": "500",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "not_implemented",
"detail": "This operation is not available.",
"status": "501",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "bad_gateway",
"detail": "We couldn't complete that request because one of Natural's services returned an unexpected response. Please try again.",
"status": "502",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}{
"errors": [
{
"code": "service_unavailable",
"detail": "The service is temporarily unavailable.",
"status": "503",
"meta": {
"supportId": "req_a1b2c3d4e5f6"
}
}
]
}Authorizations
Bearer authentication: send your API key, agent key, or OAuth access token as Authorization: Bearer <credential>.
Headers
Caller-chosen identifier for the agent run, session, or conversation, required when an agent moves money.
Maximum string length:
1024Path Parameters
Pattern:
^csn_[0-9a-f]{32}$Response
Successful Response
natural_issued: a Natural-issued card. external: a card the user added on the dashboard.
Available options:
natural_issued, external pending_approval: waiting for the user; keep polling. approved: claim it now. declined: the user said no. claimed: already collected. expired: open a new session.
Available options:
pending_approval, approved, declined, claimed, expired A pending session must be approved, and an approved one claimed, before this.
Maximum string length:
64Maximum string length:
64When the claimed proxy login stops working.
Maximum string length:
64Maximum string length:
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