WritersLogic Verifiable AI Agent Hub Inbox Create API
The Inbox Create API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for inbox create.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-inbox-create-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Inbox Create API
version: 2.0.0
description: Pay-per-call agents settled in USDC on Base via x402. Every response carries a signed provenance envelope.
contact:
name: WritersLogic
url: https://writerslogic.com/agents
email: agents@writerslogic.com
servers:
- url: https://agents.writerslogic.com
tags:
- name: Inbox Create
paths:
/api/v1/inbox-create:
post:
operationId: inbox_create
summary: Receive-only inbox for agents without a public endpoint
description: 'Creates a receive-only inbox for an AI agent that has no public endpoint: a webhook URL that accepts POST or PUT, and (when the operator has configured inbound email) a unique email address. Pair with inbox-poll to read what arrived. It never sends email or calls out, does not store attachments, does not verify senders (no SPF/DKIM), and message content is untrusted third-party data. Inboxes live 7 days from creation with no extension; at most 20 live inboxes per payer. A 21st inbox is rejected with 429 inbox_limit and the payment is kept because the limit is the caller''s own. Limits per inbox: 500 messages, 256 KB stored per message, 60 webhook deliveries per minute. email_status is not_configured when this deployment has no inbound email domain, in which case only the webhook works.
Price: 0.25 USDC on Base (x402).'
x-x402-price-usdc: '0.25'
x-x402-amount: '250000'
x-payment-info:
protocols:
- x402
price:
mode: fixed
currency: USD
amount: '0.25'
x-audience: agent-infra
x-sample-url: https://agents.writerslogic.com/api/v1/samples/inbox-create
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
properties:
label:
type: string
maxLength: 64
description: Optional name for your own bookkeeping.
tenantId:
type: string
pattern: ^[A-Za-z0-9_.-]{1,64}$
description: Required for API-key callers (namespace as key:<tenantId>; keep it unguessable). Ignored when a wallet paid.
example:
label: order-callbacks
responses:
'200':
description: Paid result with provenance
content:
application/json:
schema:
type: object
properties:
data:
type: object
properties:
inbox_id:
type: string
tenant:
type: string
label:
type: string
email_address:
anyOf:
- type: string
description: Null when inbound email is not configured.
- type: 'null'
email_status:
type: string
enum:
- ready
- not_configured
webhook_url:
type: string
description: POST or PUT here; the URL itself is the secret.
webhook_token:
type: string
created_at:
type: integer
expires_at:
type: integer
limits:
type: object
description: Every limit this service enforces, plus what it does not do.
_provenance:
type: object
description: C2PA-aligned manifest and W3C VC 2.0 (eddsa-jcs-2022) issued by the hub DID; verify at POST /api/v1/verify-provenance
required:
- data
- _provenance
'400':
description: Invalid request (no payment consumed)
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
'401':
description: Invalid X-API-KEY
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
'402':
description: Payment required or invalid
content:
application/json:
schema:
type: object
description: x402 v2 PaymentRequired (also base64 in the PAYMENT-REQUIRED header)
properties:
x402Version:
type: integer
error:
type: string
code:
type: string
resource:
type: object
accepts:
type: array
items:
type: object
extensions:
type: object
'502':
description: Upstream failure; the payment is released or not settled
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
tags:
- Inbox Create
components:
securitySchemes:
x402:
type: apiKey
in: header
name: PAYMENT-SIGNATURE
description: x402 v2 payment payload (base64) sent after a 402 challenge
apiKey:
type: apiKey
in: header
name: X-API-KEY