List a campaign's failed sends
The recipients this campaign did not reach, read from its per-contact send ledger. The campaign counters say how many were sent; only this says WHO was dropped and why, which is what makes retrying a decision rather than a guess.
reason comes from a fixed vocabulary, not from the underlying error text, so it is stable enough to branch on. It is null for rows recorded before reasons were captured.
Cursor-paginated like every other v1 list. Unlike them it also returns total: the retry action operates on that number, and a page that can only say has_more cannot tell you whether 3 or 30,000 sends failed.
Requires the campaigns:read scope — View your campaigns and their performance.
API key authentication. Use a sk_* (FULL) or pk_* (SENDING_ONLY) key as the bearer token. Public keys (pk_*) are restricted to the email-send endpoints and the self-serve list subscribe/unsubscribe pair; every other endpoint — event tracking included — answers 403 for them. In scope terms (used by /api/v1/* operations): FULL keys hold every scope; SENDING_ONLY keys hold only emails:send.
In: header
Path Parameters
Resource id.
Query Parameters
Opaque cursor from a previous response's next_cursor.
Response Body
application/json
application/problem+json
application/problem+json
application/problem+json
application/problem+json
application/problem+json
application/problem+json
curl -X GET "https://example.com/api/v1/campaigns/497f6eca-6276-4993-bfeb-53cbbbba6f08/failures"{
"data": [
{
"id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",
"contact_id": "f245e2a3-e141-4d41-912c-b1c1f5bd5598",
"email": "string",
"reason": "string",
"failed_at": "2019-08-24T14:15:22Z"
}
],
"has_more": true,
"next_cursor": "string",
"total": 0
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}{
"type": "http://example.com",
"title": "string",
"status": 0,
"detail": "string",
"instance": "string",
"code": "string",
"request_id": "string",
"errors": [
{
"pointer": "string",
"code": "string",
"message": "string"
}
]
}