The Regex Check API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for regex check.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Regex Check 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: Regex Check
paths:
/api/v1/regex-check:
post:
operationId: regex_check
summary: Regex catastrophic-backtracking check, then test cases only if proven safe
description: 'Statically analyses an ECMAScript regular expression (up to 500 characters) for catastrophic backtracking (nested or overlapping quantifiers, ambiguous alternation in a loop, backreferences, lookarounds) for agents that write or accept regexes. Runs the caller''s test subjects (up to 20, 1000 characters each) only when the pattern is proven polynomially bounded and the subject is short enough for that bound; otherwise reports the risk and runs nothing. A fail names a pattern with a provable exponential split; unknown means not proven safe, not proven unsafe. Does not translate other regex flavors.
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: developer
x-sample-url: https://agents.writerslogic.com/api/v1/samples/regex-check
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- pattern
properties:
pattern:
type: string
maxLength: 500
description: ECMAScript regex source, without slashes.
flags:
type: string
maxLength: 8
description: Flags among dgimsuy (v is reported unsupported).
pattern: ^[dgimsuvy]*$
cases:
type: array
maxItems: 20
items:
type: object
additionalProperties: false
required:
- subject
properties:
subject:
type: string
maxLength: 1000
expectMatch:
type: boolean
description: Subjects to test; at most 10000 characters in total.
example:
pattern: ^(\w+\s?)*$
cases:
- subject: hello world
expectMatch: true
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.'
pattern:
type: string
flags:
type: string
valid:
type: boolean
executed:
type: boolean
degree:
type: integer
description: Worst-case step growth exponent in subject length (1 + number of unbounded quantifiers on an unanchored search).
subjectCap:
type: integer
description: Longest subject this pattern may run on within the step budget; 0 when execution is refused.
risks:
type: array
items:
type: object
properties:
rule:
type: string
severity:
type: string
enum:
- high
- unproven
at:
type: integer
detail:
type: string
cases:
type: array
items:
type: object
properties:
index:
type: integer
ran:
type: boolean
skipped:
type: string
matched:
type: boolean
matchIndex:
type: integer
match:
type: string
groups:
type: integer
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:
- Regex Check
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