WritersLogic Verifiable AI Agent Hub Shell Quote API
The Shell Quote API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for shell quote.
Work with this as data
Every API here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for apis
7 MCP tools reach this
find_apisBrowse and filter every API in the catalog.get_api_artifactsOne API's artifacts, grouped by type.get_openapiThe primary OpenAPI for this API.find_similar_apisAPIs that look like this one.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
This API
curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-shell-quote-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.
OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Shell Quote 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: Shell Quote
paths:
/api/v1/shell-quote:
post:
operationId: shell_quote
summary: Shell quoting for bash, PowerShell and cmd.exe with a parse-back check
description: 'Turns up to 50 literal strings into a safely quoted argument for bash/sh (POSIX single-quote method), PowerShell (single-quoted literal) and cmd.exe, for agents that build a command line from untrusted or free-form text, and parses each result back with a model of that shell''s rules to prove it yields the original string. It returns `unsupported` for strings cmd.exe cannot carry safely (line breaks and control characters, any %, any double quote) instead of guessing. It does not run a shell, quote a whole command (only one argument at a time), choose an interpreter, or protect against programs that re-interpret their own arguments (eval, sh -c, ssh, cmd /c inside quotes).
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/shell-quote
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- values
properties:
values:
type: array
minItems: 1
maxItems: 50
items:
type: string
maxLength: 4096
description: Literal argument values; at most 100000 characters in total.
targets:
type: array
minItems: 1
maxItems: 3
items:
type: string
enum:
- bash
- powershell
- cmd
description: Shells to quote for; default all three. Status is unsupported when any requested target cannot carry a value.
example:
values:
- it's a $HOME; rm -rf /
- C:\Program Files\app\
- 50% off
- plain-text.txt
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.'
items:
type: array
items:
type: object
properties:
index:
type: integer
bash:
type: object
properties:
supported:
type: boolean
quoted:
type: string
reason:
type: string
roundTrip:
type: boolean
warnings:
type: array
items:
type: string
powershell:
type: object
properties:
supported:
type: boolean
quoted:
type: string
reason:
type: string
roundTrip:
type: boolean
warnings:
type: array
items:
type: string
cmd:
type: object
properties:
supported:
type: boolean
quoted:
type: string
reason:
type: string
roundTrip:
type: boolean
warnings:
type: array
items:
type: string
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:
- Shell Quote
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