The Font Glyph Svg API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for font glyph svg.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Font Glyph Svg 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 Glyph Svg
paths:
/api/v1/font-glyph-svg:
post:
operationId: font_glyph_svg
summary: 'Font to SVG: a line of text drawn as SVG paths from the font''s own TrueType…'
description: 'Reads a TrueType-outline font you supply as base64 (up to 2 MB; TTF, WOFF or WOFF2) and returns up to 200 characters of single-line text as an SVG made of outlines (one per distinct glyph, placed with ), plus each glyph''s path data in font units (y up), for an agent producing a logo, icon label or image that must not depend on the font being installed. Composite glyphs and their transforms are resolved. It does not apply kerning, ligatures or shaping (text with combining marks or complex scripts is unsupported), does not read CFF (.otf with PostScript outlines) or variable-font instances, does not make an SVG font (that format is deprecated), and a font whose OS/2 fsType forbids embedding fails with no SVG.
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-glyph-svg
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- fontBase64
- text
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.
text:
type: string
minLength: 1
maxLength: 200
description: One line; line breaks are not laid out.
fontSizePx:
type: number
minimum: 1
maximum: 1000
description: Default 100.
example:
fontBase64: 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
text: ABé
fontSizePx: 50
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.'
svg:
anyOf:
- type: string
- type: 'null'
widthPx:
anyOf:
- type: number
- type: 'null'
heightPx:
anyOf:
- type: number
description: ascender minus descender from hhea, scaled.
- type: 'null'
glyphs:
type: array
items:
type: object
properties:
codePoint:
type: string
description: The first code point that used this glyph.
glyphId:
type: integer
advance:
type: integer
description: hmtx advance in font units.
path:
type: string
description: SVG path data in font units, y up (flip y to draw).
missing:
type: array
items:
type: object
properties:
codePoint:
type: string
offset:
type: integer
description: UTF-16 offset.
unitsPerEm:
anyOf:
- type: integer
- 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 Glyph Svg
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