Triage a dead letter queue
Triage a dead letter queue. Groups entries by failure reason, names the dominant cause when one accounts for most of the queue, and separates retryable failures from permanent ones so you know whether replaying will work or fail again. Reports the same item failing more than once, and entries stating no reason at all, which cannot be triaged by anybody.
Answeringour last check, 2026-10-04
1 of 1checks answered this week
2666 msmedian answer time
$0.13listed price per call
$0.13price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.zfinia.com/x402/v1/dead-letter-batch-audit
| Category | Code and developer |
|---|---|
| Provider host | api.zfinia.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-04 | valid payment request | 402 | $0.13 | 2666 ms |
Example input (from the provider)
{
"body": {
"entries": [
{
"error": "UPSTREAM_TIMEOUT",
"failed_at": "2026-10-01T00:00:00Z",
"message_id": "m-1"
},
{
"error": "UPSTREAM_TIMEOUT",
"failed_at": "2026-10-01T00:00:05Z",
"message_id": "m-2"
},
{
"error": "UPSTREAM_TIMEOUT",
"failed_at": "2026-10-01T00:00:09Z",
"message_id": "m-3"
},
{
"error": "UPSTREAM_TIMEOUT",
"failed_at": "2026-10-01T00:05:00Z",
"message_id": "m-1"
},
{
"error": {
"code": "SCHEMA_REJECTED",
"detail": "total was a string"
},
"message_id": "m-4"
},
{
"message_id": "m-5"
}
],
"id_field": "message_id",
"reason_field": "error",
"retryable_reasons": [
"UPSTREAM_TIMEOUT",
"RATE_LIMITED"
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"entries": {
"items": {
"type": "object"
},
"maxItems": 2000,
"minItems": 1,
"type": "array"
},
"id_field": {
"maxLength": 256,
"type": "string"
},
"reason_field": {
"maxLength": 256,
"type": "string"
},
"retryable_reasons": {
"items": {
"maxLength": 256,
"type": "string"
},
"maxItems": 100,
"minItems": 1,
"type": "array"
}
},
"required": [
"entries"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}