The Font Face Css API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for font face css.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Font Face Css 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: Font Face Css
paths:
/api/v1/font-face-css:
post:
operationId: font_face_css
summary: '@font-face block generated from the font file: family, weight, style, stretch…'
description: 'Reads a font you supply as base64 (up to 2 MB, any of TTF, OTF, WOFF, WOFF2) and writes an @font-face rule for the URLs you will serve it from, for an agent or build step generating CSS: font-family from the name table, font-weight from OS/2 (or the fvar wght range of a variable font), font-style, font-stretch, and unicode-range from the cmap. Names and URLs are escaped as CSS strings. It does not host, convert or subset the font, does not check that your URLs serve the format you name, does not read collections (.ttc), and a font whose OS/2 fsType forbids embedding fails with no CSS.
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/font-face-css
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- fontBase64
- sources
properties:
fontBase64:
type: string
minLength: 8
maxLength: 2796204
description: Base64 of a .ttf, .otf, .woff or .woff2 file (not a .ttc collection), up to 2 MB.
sources:
type: array
items:
type: object
additionalProperties: false
required:
- url
- format
properties:
url:
type: string
minLength: 1
maxLength: 2048
description: Where you will serve this file; written into url(). Quotes, backslashes and control characters are escaped.
format:
type: string
enum:
- woff2
- woff
- truetype
- opentype
description: The format() hint for that file.
maxItems: 4
minItems: 1
description: One entry per file you serve, best format first.
fontDisplay:
type: string
enum:
- auto
- block
- swap
- fallback
- optional
description: Default swap.
family:
type: string
minLength: 1
maxLength: 200
description: Overrides the family name read from the font.
includeUnicodeRange:
type: boolean
description: Default true; omitted automatically for fonts with more than 300 cmap ranges.
example:
fontBase64: 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
sources:
- url: /fonts/synth-sans.woff2
format: woff2
- url: /fonts/synth-sans.woff
format: woff
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.'
css:
anyOf:
- type: string
- type: 'null'
family:
anyOf:
- type: string
- type: 'null'
weight:
anyOf:
- type: string
description: A single weight or a `min max` range.
- type: 'null'
style:
anyOf:
- type: string
enum:
- normal
- italic
- type: 'null'
stretch:
anyOf:
- type: string
- type: 'null'
variable:
type: boolean
description: True when the font has an fvar table.
axes:
type: array
items:
type: object
properties:
tag:
type: string
min:
type: number
default:
type: number
max:
type: number
unicodeRange:
anyOf:
- type: string
- type: 'null'
unicodeRangeCount:
anyOf:
- type: integer
description: Ranges the cmap collapses to.
- type: 'null'
licence:
anyOf:
- type: object
description: What the font file itself declares about embedding (OS/2 fsType and name IDs 13/14). A declaration in the file, not legal advice and not a licence.
properties:
declared:
type: boolean
description: False when the font has no OS/2 table, so no embedding permission is declared.
fsType:
anyOf:
- type: integer
- type: 'null'
restricted:
type: boolean
description: 'fsType bit 0x0002: the vendor forbids embedding.'
previewPrintOnly:
type: boolean
description: 'fsType permission 0x0004 alone: preview and print embedding only.'
ambiguous:
type: boolean
description: Conflicting permission bits (for example restricted with another bit set) or the deprecated bit 0; the OS/2 specification does not give one answer.
noSubsetting:
type: boolean
bitmapOnly:
type: boolean
license:
anyOf:
- type: string
description: name ID 13
- type: 'null'
licenseUrl:
anyOf:
- type: string
description: name ID 14
- type: 'null'
- type: 'null'
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:
- Font Face Css
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