Start one renewable random receive-only temporary email address, then wait for a
Start one renewable random receive-only temporary email address, then wait for and read bounded inbound mail. Use it as a disposable email or throwaway inbox for agent workflows, and extend the same active address when more time is needed. No outbound email or mailbox suite.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
247 msmedian answer time
$0.05listed price per call
$0.05price 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://ausca.com/v1/open-inbox
| Category | Everything else |
|---|---|
| Provider host | ausca.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 53 from 23 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.05 | 247 ms |
Example input (from the provider)
{
"body": {
"idempotency_key": "ausca-x402-discovery-example",
"input": {
"duration_seconds": 3600
},
"input_schema_digest": "sha256:a97f97a65bc02cd9267c048f17d06cef63f5c4b74b6cc4f9f9071684b3f943be",
"offer_id": "inbox.receive",
"offer_revision": "receive-duration-r4",
"offer_revision_digest": "sha256:6561864377668d65116b7a66887b24af8207f7509633b8184800094ee460e7e1",
"output_schema_digest": "sha256:b7435b8fca878463b21532066b8c645c05cf82c61ed040f609b7f048393d63c6"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"idempotency_key": {
"maxLength": 128,
"minLength": 16,
"type": "string"
},
"input": {
"additionalProperties": false,
"properties": {
"duration_seconds": {
"enum": [
3600,
86400,
604800
],
"type": "integer"
}
},
"required": [
"duration_seconds"
],
"type": "object"
},
"input_schema_digest": {
"const": "sha256:a97f97a65bc02cd9267c048f17d06cef63f5c4b74b6cc4f9f9071684b3f943be"
},
"offer_id": {
"const": "inbox.receive"
},
"offer_revision": {
"const": "receive-duration-r4"
},
"offer_revision_digest": {
"const": "sha256:6561864377668d65116b7a66887b24af8207f7509633b8184800094ee460e7e1"
},
"output_schema_digest": {
"const": "sha256:b7435b8fca878463b21532066b8c645c05cf82c61ed040f609b7f048393d63c6"
}
},
"required": [
"offer_id",
"offer_revision",
"offer_revision_digest",
"input_schema_digest",
"output_schema_digest",
"input",
"idempotency_key"
],
"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": {
"properties": {
"inspect_url": {
"pattern": "^/v1/invocations/[A-Za-z0-9][A-Za-z0-9._:-]*$",
"type": "string"
},
"invocation": {
"properties": {
"invocation_id": {
"maxLength": 128,
"minLength": 1,
"pattern": "^[A-Za-z0-9][A-Za-z0-9._:-]*$",
"type": "string"
},
"offer_revision_digest": {
"const": "sha256:6561864377668d65116b7a66887b24af8207f7509633b8184800094ee460e7e1"
},
"output": {
"additionalProperties": false,
"properties": {
"resource_lease": {
"additionalProperties": false,
"properties": {
"address": {
"format": "email",
"maxLength": 320,
"minLength": 3,
"type": "string"
},
"created_at": {
"format": "date-time",
"type": "string"
},
"expires_at": {
"format": "date-time",
"type": "string"
},
"inbox_id": {
"pattern": "^inb_[A-Za-z0-9_-]{22,64}$",
"type": "string"
},
"schema": {
"const": "ausca.agent_inbox.lease.v1"
},
"state": {
"const": "active"
}
},
"required": [
"schema",
"inbox_id",
"address",
"state",
"created_at",
"expires_at"
],
"type": "object"
}
},
"required": [
"resource_lease"
],
"type": "object"
},
"output_digest": {
"pattern": "^sha256:[a-f0-9]{64}$",
"type": "string"
},
"receipt_ref": {
"properties": {
"public_url": {
"format": "uri",
"maxLength": 2048,
"pattern": "^https://[^?#]+/r/[a-f0-9]{64}$",
"type": "string"
},
"type": {
"const": "receipt"
},
"uri": {
"maxLength": 512,
"minLength": 1,
"type": "string"
}
},
"required": [
"type",
"uri"
],
"type": "object"
},
"state": {
"enum": [
"admitted",
"running",
"succeeded",
"failed",
"cancellation_requested",
"cancelled"
],
"type": "string"
},
"updated_at": {
"format": "date-time",
"type": "string"