POST /api/v2/outbound/contactlists returns 400 Bad Request with “INVALID_VALUE” for the contacts field.
I am building a high-throughput ingestion service in Go that pushes new contacts to Genesys Cloud Outbound. I have verified the payload against the Swagger spec multiple times, yet the API rejects it. The error response is generic, providing little insight into which specific field is malformed.
Here is the Go struct I am using:
type ContactListRequest struct {
Name string `json:"name"`
Description string `json:"description"`
Contacts []Contact `json:"contacts"`
}
type Contact struct {
ContactID string `json:"contactId"`
Data []ContactData `json:"data"`
}
type ContactData struct {
Name string `json:"name"`
Value string `json:"value"`
}
And the JSON payload generated:
{
"name": "Test_List_Go",
"description": "Automated test",
"contacts": [
{
"contactId": "c-12345",
"data": [
{"name": "phone", "value": "5550199"},
{"name": "firstName", "value": "John"}
]
}
]
}
The endpoint expects the contacts array to be present in the body for a create-with-data operation. However, if I remove the contacts field, the list is created successfully but empty. When included, it fails immediately.
- I have tried using the official Genesys Cloud Go SDK (
github.com/mybuilder/go-genesyscloud), which serializes the struct identically to my manual encoding/json implementation.
- I have verified that the
contactId is unique within the request payload and that the data fields match the expected schema for the contact list definition.
Is there a hidden validation rule regarding the contacts field during the initial POST that I am missing? Or does the API require a specific content-type header beyond application/json? I am running this from America/Chicago, so timezone issues are unlikely to affect the static data.
the issue is almost certainly the contact_uri field. the outbound api requires this to be a valid uri string, not just a raw phone number or email. in python, i handle this by wrapping it in a tel: or mailto: scheme before sending. also, ensure your id field in the contact object is a uuid, not an integer.
import httpx
import uuid
import asyncio
async def push_contacts(base_url: str, token: str):
payload = {
"name": "new_list",
"contacts": [
{
"id": str(uuid.uuid4()), # must be uuid string
"contact_uri": "tel:+15550199888", # must be valid uri
"name": "test_user",
"address": {
"street": "123 main st"
}
}
]
}
headers = {
"authorization": f"bearer {token}",
"content-type": "application/json"
}
async with httpx.AsyncClient() as client:
# retry on 429 with exponential backoff
for attempt in range(3):
try:
resp = await client.post(
f"{base_url}/api/v2/outbound/contactlists",
json=payload,
headers=headers
)
if resp.status_code == 429:
await asyncio.sleep(2 ** attempt)
continue
resp.raise_for_status()
return resp.json()
except httpx.HTTPStatusError as e:
if e.response.status_code != 429:
raise e
raise Exception("max retries exceeded")
check the contact_uri format specifically. if you send +15550199888 without the tel: prefix, the validator throws INVALID_VALUE. also verify that the list doesn’t already exist with the same name in that division, as that can sometimes cause similar confusion depending on how the client handles idempotency.
Make sure you validate the contact_uri format before sending. The API rejects raw phone numbers, so you must prefix with tel: or mailto: to avoid that 400 INVALID_VALUE error.
You need to ensure the contact_uri follows the strict format.
POST /api/v2/outbound/contactlists returns 400 Bad Request with “INVALID_VALUE”
The suggestion above is correct. In Python, wrap it in tel: or mailto:. Also, check that your contact ID is a UUID, not an integer.
contact_uri = "tel:+15550199"
contact_id = str(uuid.uuid4())
The main issue here is that the 400 INVALID_VALUE error usually stems from a mismatch in how the Go struct marshals the contact_uri or the internal id field, rather than just the scheme prefix. While the suggestion above correctly identifies the tel: or mailto: requirement, the Genesys Cloud Outbound API is strict about the id field being a valid RFC 4122 UUID v4 string. If your Go struct defines ID as an integer or leaves it as an empty string, the API rejects the entire contact object.
In my Zapier custom triggers, I handle this by pre-validating the payload before the HTTP request. For a Go service, you should ensure your struct tags explicitly map to the API’s expected JSON keys and that the ID is generated correctly.
Here is how I structure the contact object in a Zapier action to avoid this, which mirrors what your Go struct should produce:
const zapier = require('zapier-platform-core');
const createContact = async (z, bundle) => {
const contactId = require('uuid').v4();
const options = {
url: `https://api.mypurecloud.com/api/v2/outbound/contactlists`,
method: 'POST',
headers: {
'Authorization': `Bearer ${bundle.authData.access_token}`,
'Content-Type': 'application/json'
},
body: {
name: bundle.inputData.name,
contacts: [
{
id: contactId, // Must be a UUID string
contact_uri: `tel:${bundle.inputData.phoneNumber}`, // Must include scheme
fields: []
}
]
}
};
return z.request(options)
.then((response) => {
return z.JSON.parse(response.content);
});
};
Ensure you are not sending an array of contacts directly to the endpoint without wrapping it in the contacts property of the ContactList object. The API expects a ContactList resource, not a raw array. Also, verify your OAuth token has the outbound:contactlists scope, as a 403 can sometimes be misinterpreted as a validation error in certain client libraries. Check your Go struct’s json tags to ensure omitempty is not stripping required fields like name.