The Deadline Feasibility API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for deadline feasibility.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Deadline Feasibility…
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: Deadline Feasibility
paths:
/api/v1/deadline-feasibility:
post:
operationId: deadline_feasibility
summary: Can this plan of steps finish inside the remaining time, in the expected case…
description: 'Takes steps with expected and worst-case durations, dependencies (steps with no dependency between them run in parallel), retries with backoff, and the time remaining, and computes the critical path for both cases. Verdict guaranteed (worst case fits: pass), likely (only the expected case fits: unknown) or infeasible (even the expected case does not fit: fail), with the slack and the critical-path steps. Takes durations as given and uses no clock; does not measure, schedule or cap anything.
Price: 0.005 USDC on Base (x402).'
x-x402-price-usdc: '0.005'
x-x402-amount: '5000'
x-payment-info:
protocols:
- x402
price:
mode: fixed
currency: USD
amount: '0.005'
x-audience: agent-infra
x-sample-url: https://agents.writerslogic.com/api/v1/samples/deadline-feasibility
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- steps
- remainingMs
properties:
steps:
type: array
minItems: 1
maxItems: 100
items:
type: object
additionalProperties: false
required:
- id
- expectedMs
- worstMs
properties:
id:
type: string
minLength: 1
maxLength: 200
expectedMs:
type: integer
minimum: 0
maximum: 86400000
worstMs:
type: integer
minimum: 0
maximum: 86400000
description: Worst-case duration of one attempt. Must be at least expectedMs.
after:
type: array
maxItems: 20
items:
type: string
minLength: 1
maxLength: 200
description: Step ids that must finish first.
retries:
type: integer
minimum: 0
maximum: 10
description: Retries after a failed attempt; the worst case runs them all.
backoffMs:
type: integer
minimum: 0
maximum: 3600000
description: Wait before each retry (constant).
remainingMs:
type: integer
minimum: 0
maximum: 604800000
description: Time left to the hard deadline, measured by the caller.
overheadMs:
type: integer
minimum: 0
maximum: 3600000
description: Fixed time to reserve for settlement, serialization, etc.
example:
steps:
- id: fetch-a
expectedMs: 800
worstMs: 3000
retries: 1
backoffMs: 500
- id: fetch-b
expectedMs: 600
worstMs: 2500
- id: merge
expectedMs: 100
worstMs: 400
after:
- fetch-a
- fetch-b
remainingMs: 8000
overheadMs: 500
responses:
'200':
description: Paid result with provenance
content:
application/json:
schema:
type: object
properties:
data:
type: object
properties:
status:
type: string
enum:
- pass
- fail
- unknown
- unsupported
description: 'pass: every rule held. fail: a rule was violated (see witnesses). unknown: the input lacks the evidence to decide. unsupported: outside what this engine covers. Missing evidence is never a pass.'
verdict:
type: string
enum:
- guaranteed
- likely
- infeasible
expectedMs:
type: integer
description: Critical-path length, expected case, plus overhead.
worstMs:
type: integer
description: Critical-path length, worst case with all retries, plus overhead.
slackExpectedMs:
type: integer
slackWorstMs:
type: integer
description: May be negative.
criticalPath:
type: array
items:
type: string
description: Worst-case critical path.
witnesses:
type: array
items:
type: object
properties:
ruleId:
type: string
detail:
type: string
path:
type: string
description: JSON pointer or dotted path into the input.
offset:
type: integer
index:
type: integer
expected:
description: What the rule required.
actual:
description: What the input had.
versions:
type: object
description: Every semantic dependency of this answer (engine, tables and their as-of dates, tokenizer, calendar, rounding profile).
limits:
type: array
items:
type: string
deterministic:
type: boolean
description: 'Always true: pure code, no model.'
_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:
- Deadline Feasibility
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