The Edit Anchor Check API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for edit anchor check.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Edit Anchor 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: Edit Anchor Check
paths:
/api/v1/edit-anchor-check:
post:
operationId: edit_anchor_check
summary: Check that an edit's old-string occurs exactly once in a file, with match…
description: 'Counts how many times an old-string occurs in a supplied file text (as a replace-in-file tool would see it) and returns each match''s offset, line, column and surrounding lines, for an agent about to issue an edit. pass: exactly one literal match, even counting overlapping ones. unknown: several matches, or one match that overlaps another occurrence of the same text (ambiguous; contexts show how to extend the string). fail: no literal match; the response then reports whitespace-tolerant line matches and typographic-quote or dash folding matches so the agent can see why. Does not apply the edit (use patch-anchor) and never edits 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/edit-anchor-check
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- file
- oldString
properties:
file:
type: string
maxLength: 524288
description: File text, at most 524288 UTF-8 bytes and 100000 lines.
oldString:
type: string
minLength: 1
maxLength: 65536
contextLines:
type: integer
minimum: 0
maximum: 10
description: Lines of context before and after each listed match. Default 2.
example:
file: 'const a = 1;
const b = 2;
const a = 1;
'
oldString: const b = 2;
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.'
exactCount:
type: integer
description: Non-overlapping literal occurrences.
overlappingCount:
type: integer
description: Occurrences counting overlaps; differs from exactCount for self-overlapping strings.
matches:
type: array
description: First 10 literal matches.
items:
type: object
properties:
offset:
type: integer
description: UTF-16 code-unit offset.
line:
type: integer
description: 1-based.
column:
type: integer
description: 1-based, UTF-16 units.
before:
type: array
items:
type: string
after:
type: array
items:
type: string
tolerant:
type: object
description: 'Only when there is no literal match: whole-line matches under the first tolerance rung that has any.'
properties:
tolerance:
type: string
startLines:
type: array
items:
type: integer
eolMismatch:
type: boolean
description: The lines match exactly; only CRLF vs LF in the search text differs.
foldedCount:
type: integer
description: 'Only when there is no literal match: occurrences after folding curly quotes, en/em dashes and NBSP to ASCII.'
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:
- Edit Anchor 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