WritersLogic Verifiable AI Agent Hub Print Estimate API
The Print Estimate API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for print estimate.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-print-estimate-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Print Estimate 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: Print Estimate
paths:
/api/v1/print-estimate:
post:
operationId: print_estimate
summary: Print resolution, bleed and uncompressed bitmap size arithmetic
description: 'Given an image''s pixel size and a print size (inches, millimetres or centimetres) plus optional bleed, margin and target ppi, returns the effective ppi over trim plus bleed, whether it meets the target, the pixel count a target ppi needs, the largest print size a target ppi allows, the safe area, and the exact uncompressed bitmap size. Built for print-on-demand, layout and image-prep agents; the target ppi is yours to choose, there is no built-in quality rule. Unit maths is exact (1 in = 25.4 mm). It does not estimate compressed file sizes (JPEG, PNG, TIFF/LZW), colour management or printer-specific limits, and the raw size counts pixels only (no headers, row padding or alpha unless in channels).
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: business
x-sample-url: https://agents.writerslogic.com/api/v1/samples/print-estimate
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- widthPx
- heightPx
properties:
widthPx:
type: integer
description: Image width in pixels.
minimum: 1
maximum: 1000000
heightPx:
type: integer
description: Image height in pixels.
minimum: 1
maximum: 1000000
unit:
type: string
enum:
- in
- mm
- cm
description: Unit for print size, bleed and margin (default in).
printWidth:
type: number
description: Trim width in unit.
minimum: 0.001
maximum: 100000
printHeight:
type: number
description: Trim height in unit.
minimum: 0.001
maximum: 100000
bleed:
type: number
description: Bleed added on each side of the trim, in unit (default 0).
minimum: 0
maximum: 10000
margin:
type: number
description: Safe margin inside the trim on each side, in unit (default 0).
minimum: 0
maximum: 10000
targetPpi:
type: number
description: The resolution you require, in pixels per inch.
minimum: 1
maximum: 100000
channels:
type: integer
description: Channels per pixel for the raw size (default 3).
minimum: 1
maximum: 8
bitsPerChannel:
type: integer
enum:
- 1
- 8
- 16
- 32
description: Bits per channel (default 8).
claimedEffectivePpi:
type: number
description: An effective ppi you assert; checked against the computed value.
minimum: 0
maximum: 10000000
claimedRawBytes:
type: integer
description: An uncompressed byte count you assert.
minimum: 0
maximum: 9000000000000000
ppiTolerance:
type: number
description: Accepted ppi difference for claimedEffectivePpi (default 0.5).
minimum: 0
maximum: 1000
example:
widthPx: 3000
heightPx: 2000
printWidth: 10
printHeight: 6.667
bleed: 0.125
targetPpi: 300
unit: in
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.'
unit:
type: string
effectivePpiX:
type: number
description: Pixels per inch horizontally over trim plus bleed.
effectivePpiY:
type: number
description: Pixels per inch vertically.
effectivePpi:
type: number
description: 'The smaller of the two: the resolution when the image covers the print area.'
aspectPixels:
type: number
description: Pixel width / height.
aspectPrint:
type: number
description: Trim width / height.
maxPrintSize:
type: object
description: Largest width and height in unit at targetPpi.
bleedPixelsRequired:
type: object
description: Pixels needed to cover trim plus bleed at targetPpi (rounded up).
safeArea:
type: object
description: Trim minus margins, in unit.
rawBits:
type: number
description: Exact width x height x channels x bits.
rawBytes:
type: number
description: rawBits / 8 rounded up; uncompressed, unpadded, no header.
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:
- Print Estimate
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