{ "x402Version": 2, "id": 8199, "slug": "8199", "resource": "https://label.api.williamrobinson.dev/v1/label/compile", "description": "Compile a structured product-label spec (dimensions, EU FIC or US FDA ruleset, ingredients/allergens, nutrition, GS1 barcode, brand style) into a deterministic print-ready PDF with trim/bleed/safe boxes and embedded fonts, an SVG proof, a dieline, and a report auditing x-height legibility, allergen emphasis, nutrition order, and barcode check digits/quiet zones. Not a legal review of packaging compliance.", "type": "http", "accepts": [ { "scheme": "exact", "network": "eip155:8453", "payTo": "0x26026370fe8b2bb17af9092a17691c76519366da", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "150000", "maxTimeoutSeconds": 300 } ], "outputSchema": { "bazaar": { "info": { "input": { "body": { "barcode": { "data": "5901234123457", "humanReadable": true, "symbology": "ean13" }, "format": { "bleedMm": 2, "cornerRadiusMm": 3, "heightMm": 60, "safeMm": 2, "widthMm": 100 }, "ingredients": [ { "allergen": true, "text": "Wheat flour" }, { "allergen": false, "text": "Sunflower oil" }, { "allergen": false, "text": "Sourdough culture" }, { "allergen": false, "text": "Sea salt" }, { "allergen": true, "text": "Sesame seeds" } ], "nutrition": { "basis": "100g", "carbohydrateG": 68.5, "energyKcal": 442, "energyKj": 1850, "fatG": 14.2, "fibreG": 3.4, "proteinG": 10.6, "saltG": 1.2, "saturatesG": 1.8, "sugarsG": 2.1 }, "product": { "brand": "Stonebake", "business": { "address": "14 Mill Lane, Bristol BS1 4ST, United Kingdom", "name": "Stonebake Bakery Ltd" }, "dateLine": "Best before: see lid", "description": "Crisp sourdough crackers baked with stone-milled wheat flour.", "name": "Stonebake Sourdough Crackers", "netQuantity": { "unit": "g", "value": 150 }, "origin": "Baked in Italy", "storage": "Store in a cool, dry place. Reseal after opening." }, "ruleset": "eu-fic", "style": { "accent": { "rgb": "#8a3b12" }, "background": { "rgb": "#ffffff" }, "fontFamily": "liberation-sans", "text": { "rgb": "#000000" } }, "warnings": [ "May contain traces of milk." ] }, "bodyType": "json", "method": "POST", "type": "http" }, "output": { "example": { "allergens": { "detectedUnmarked": [], "marked": [ "Wheat flour", "Sesame seeds" ] }, "artifacts": [ { "href": "https://label.api.williamrobinson.dev/v1/label/artifacts/0123456789abcdef0123456789abcdef0123456789abcdef/label.pdf", "mediaType": "application/pdf", "name": "label.pdf", "sha256": "20361c4fe6d39dfdc1c9dc7af8b44ef2022c178a6934170fda56863dbc642d45", "sizeBytes": 23309 }, { "href": "https://label.api.williamrobinson.dev/v1/label/artifacts/0123456789abcdef0123456789abcdef0123456789abcdef/label.svg", "mediaType": "image/svg+xml", "name": "label.svg", "sha256": "b664f2085d9bbb0da3438681f726fd2e168cf9bc29fb8e4d5848890fdfdc5eaa", "sizeBytes": 5472 }, { "href": "https://label.api.williamrobinson.dev/v1/label/artifacts/0123456789abcdef0123456789abcdef0123456789abcdef/proof.png", "mediaType": "image/png", "name": "proof.png", "sha256": "18debfc496d9ea19cb5b0455faf7524c88884b28d161f4b33396640c1ba17e0b", "sizeBytes": 154380 }, { "href": "https://label.api.williamrobinson.dev/v1/label/artifacts/0123456789abcdef0123456789abcdef0123456789abcdef/dieline.svg", "mediaType": "image/svg+xml", "name": "dieline.svg", "sha256": "d36b7424a763ec866f7f71eabbf6205e0949794ba8bc6a14fb3bc1e15a7ef44c", "sizeBytes": 609 }, { "href": "https://label.api.williamrobinson.dev/v1/label/artifacts/0123456789abcdef0123456789abcdef0123456789abcdef/report.json", "mediaType": "application/json", "name": "report.json", "sha256": "7c1f3db881e8538063b3925a7c5066db13f26aa0c77a06dfff5c1eaf421d7ebc", "sizeBytes": 8226 } ], "barcode": { "checkDigitValid": true, "data": "5901234123457", "heightMm": 22.400000000000002, "magnification": 0.8753016894609815, "moduleMm": 0.28884955752212393, "quietZoneLeftMm": 3.1773451327433633, "quietZoneRightMm": 2.0219469026548675, "symbology": "ean13", "truncated": true, "widthMm": 32.64 }, "checks": [ { "code": "RULESET_SUPPORTED", "detail": "\"eu-fic\" is a supported ruleset", "status": "passed" }, { "code": "MANDATORY_BLOCKS", "detail": "Every mandatory particular for \"eu-fic\" is present: product name, net quantity, business name/address, date line", "status": "passed" }, { "code": "ALLERGEN_EMPHASIS", "detail": "Every allergen keyword match in the ingredient list is marked allergen: true", "status": "passed" }, { "code": "NUTRITION_ORDER", "detail": "Nutrition rendered in the eu-fic declaration order: energy, fat, saturates, carbohydrate, sugars, fibre, protein, salt", "status": "passed" }, { "code": "LOGO_VALID", "detail": "No logo was supplied", "status": "not_checked" }, { "code": "TEXT_FITS", "detail": "All mandatory text fits within the safe area at or above the legal minimum text size, with no line wider than its column", "status": "passed" }, { "code": "MIN_X_HEIGHT", "detail": "Every mandatory text box meets or exceeds its 0.9 mm x-height floor", "status": "passed" }, { "code": "SAFE_ZONE", "detail": "Every drawn element, including ink extents and the barcode column, stays within the 2 mm safe zone", "status": "passed" }, { "code": "NUTRITION_FORMAT", "detail": "Nutrition declared in tabular format with the values aligned (FIC Art. 34(2))", "status": "passed" }, { "code": "NET_QUANTITY_PLACEMENT", "detail": "Only enforced under us-fda (21 CFR 101.105(f))", "status": "not_checked" }, { "code": "BARCODE_VALID", "detail": "Check digit valid for \"5901234123457\"", "status": "passed" }, { "code": "BARCODE_MAGNIFICATION", "detail": "Magnification 0.88x", "status": "passed" }, { "code": "BARCODE_QUIET_ZONE", "detail": "Quiet zones drawn: 3.18 mm left, 2.02 mm right", "status": "passed" }, { "code": "QR_MODULE_SIZE", "detail": "Only applies to 2D symbologies", "status": "not_checked" }, { "code": "CONTRAST", "detail": "Contrast ratio 7.73:1 meets the 4.5:1 target", "status": "passed" }, { "code": "GLYPH_COVERAGE", "detail": "Every character is covered by liberation-sans", "status": "passed" }, { "code": "FONTS_EMBEDDED", "detail": "2 embedded TrueType font program(s) found (regular + bold)", "status": "passed" }, { "code": "PDF_BOXES", "detail": "TrimBox and BleedBox are present in the generated PDF", "status": "passed" } ], "contrast": { "accentOnBackground": 7.73487762982462, "textOnBackground": 21 }, "expiresAt": "2026-09-13T17:27:50.368Z", "fonts": { "bold": "LiberationSans-Bold.ttf", "family": "liberation-sans", "regular": "LiberationSans-Regular.ttf" }, "format": { "areaCm2": 60, "bleedMm": 2, "cornerRadiusMm": 3, "heightMm": 60, "safeMm": 2, "smallPack": true, "widthMm": 100 }, "layout": [ { "block": "header.brand", "bold": true, "fontSizePt": 7.5, "heightMm": 2.955891927083333, "lines": 1, "widthMm": 96, "xHeightMm": 1.3978474934895833, "xMm": 4, "yMm": 4 }, { "block": "header.name", "bold": true, "fontSizePt": 12.5, "heightMm": 4.926486545138888, "lines": 1, "widthMm": 96, "xHeightMm": 2.329745822482639, "xMm": 4, "yMm": 7.255891927083333 }, { "block": "header.description", "bold": false, "fontSizePt": 6.5, "heightMm": 2.561773003472222, "lines": 1, "widthMm": 96, "xHeightMm": 1.211467827690972, "xMm": 4, "yMm": 12.482378472222223 }, { "block": "body.ingredients", "bold": false, "fontSizePt": 6.5, "heightMm": 4.969481336805556, "lines": 2, "widthMm": 59.56959149810366, "xHeightMm": 1.211467827690972, "xMm": 4, "yMm": 16.344151475694446 }, { "block": "body.nutrition", "bold": false, "fontSizePt": 6.5, "heightMm": 21.82343967013889, "lines": 9, "widthMm": 59.56959149810366, "xHeightMm": 1.211467827690972, "xMm": 4, "yMm": 21.613632812500004 }, { "block": "body.nutrition.values", "bold": false, "fontSizePt": 6.5, "heightMm": 21.82343967013889, "lines": 9, "widthMm": 59.56959149810366, "xHeightMm": 1.211467827690972, "xMm": 4, "yMm": 21.613632812500004 }, { "block": "footer.netQuantity", "bold": true, "fontSizePt": 5.5, "heightMm": 2.167654079861111, "lines": 1, "widthMm": 59.56959149810366, "xHeightMm": 1.025088161892361, "xMm": 4, "yMm": 44.737072482638894 }, { "block": "footer.storage", "bold": false, "fontSizePt": 5.5, "heightMm": 2.167654079861111, "lines": 1, "widthMm": 59.56959149810366, "xHeightMm": 1.025088161892361, "xMm": 4, "yMm": 47.2047265625 }, { "block": "footer.origin", "bold": false, "fontSizePt": 5.5, "heightMm": 2.167654079861111, "lines": 1, "widthMm": 59.56959149810366, "xHeightMm": 1.025088161892361, "xMm": 4, "yMm": 49.672380642361105 }, { "block": "footer.business", "bold": false, "fontSizePt": 5.5, "heightMm": 4.204945746527777, "lines": 2, "widthMm": 59.56959149810366, "xHeightMm": 1.025088161892361, "xMm": 4, "yMm": 52.14003472222221 }, { "block": "warnings.0", "bold": false, "fontSizePt": 5.5, "heightMm": 2.167654079861111, "lines": 1, "widthMm": 59.56959149810366, "xHeightMm": 1.025088161892361, "xMm": 4, "yMm": 56.644980468749985 } ], "limitations": [ "This is an automated heuristic compliance check, not a legal review; consult qualified counsel before printing regulated packaging.", "Allergen detection is a fixed keyword match against ingredient text, not a food-science parser; it can both miss and over-match unusual phrasing.", "x-height is measured from the embedded font's own OS/2.xHeight metric, which can differ from a caliper measurement of printed type.", "eu-fic's \"largest surface\" area test and us-fda's principal-display-panel area test both use the label's own trim area as a proxy; a real pack's largest surface may differ.", "CMYK colours are converted to sRGB with a naive (1-c)(1-k) formula for the SVG/PNG preview, with no ICC profile; the PDF's own CMYK fills are exact and unaffected.", "The generated PDF is not PDF/X-1a certified: it carries no OutputIntent or ICC profile.", "Layout uses fixed header/body/footer/barcode-zone templates; no freeform positioning.", "Only Latin-script text covered by the Liberation Sans/Serif glyph sets is supported; unsupported characters are reported by GLYPH_COVERAGE.", "us-fda's Nutrition Facts graphic format (21 CFR 101.9(d)) is not verified, only the declared nutrient order.", "Allergens are emphasised by capitalisation (FIC Art. 21(1)(b) / FALCPA), not bold weight; mixed-weight runs inside one line are not supported." ], "minimumXHeightMm": 0.9, "ruleset": "eu-fic", "status": "passed", "timings": { "layoutMs": 22.255515999999943, "renderMs": 289.43764899999996, "totalMs": 324.87831199999994 }, "warnings": [ "Barcode height was truncated to 22.40 mm to fit the available space." ] }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "body": { "$schema": "https://json-schema.org/draft/2020-12/schema", "additionalProperties": false, "properties": { "barcode": { "additionalProperties": false, "properties": { "data": { "description": "Exactly 13 digits (with GS1 check digit) for ean13, exactly 12 for upca; any UTF-8 text up to 512 bytes for qrcode/datamatrix.", "maxLength": 512, "minLength": 1, "type": "string" }, "humanReadable": { "default": true, "description": "Draw the human-readable digits (1D only).", "type": "boolean" }, "symbology": { "enum": [ "ean13", "upca", "qrcode", "datamatrix" ], "type": "string" }, "widthMm": { "description": "Requested symbol width incl. quiet zones; omitted = GS1 nominal / 20 mm for 2D.", "maximum": 300, "minimum": 5, "type": "number" } }, "required": [ "symbology", "data" ], "type": "object" }, "format": { "additionalProperties": false, "properties": { "bleedMm": { "default": 2, "maximum": 5, "minimum": 0, "type": "number" }, "cornerRadiusMm": { "default": 0, "description": "Must not exceed min(widthMm, heightMm) / 2; validated against the format's own dimensions.", "minimum": 0, "type": "number" }, "heightMm": { "description": "Trim height, millimetres.", "maximum": 400, "minimum": 20, "type": "number" }, "safeMm": { "default": 2, "description": "Inside the trim; mandatory text never enters it.", "maximum": 10, "minimum": 0, "type": "number" }, "widthMm": { "description": "Trim width, millimetres.", "maximum": 400, "minimum": 20, "type": "number" } }, "required": [ "widthMm", "heightMm" ], "type": "object" }, "ingredients": { "items": { "additionalProperties": false, "properties": { "allergen": { "description": "Emphasised in the ingredient list and fed into the allergen-statement/scan checks.", "type": "boolean" }, "text": { "maxLength": 120, "minLength": 1, "type": "string" } }, "required": [ "text", "allergen" ], "type": "object" }, "maxItems": 200, "type": "array" }, "nutrition": { "additionalProperties": false, "properties": { "addedSugarsG": { "maximum": 100000, "minimum": 0, "type": "number" }, "basis": { "enum": [ "100g", "100ml", "serving" ], "type": "string" }, "carbohydrateG": { "maximum": 100000, "minimum": 0, "type": "number" }, "cholesterolMg": { "maximum": 100000, "minimum": 0, "type": "number" }, "energyKcal": { "maximum": 100000, "minimum": 0, "type": "number" }, "energyKj": { "maximum": 100000, "minimum": 0, "type": "number" }, "fatG": { "maximum": 100000, "minimum": 0, "type": "number" }, "fibreG": { "maximum": 100000, "minimum": 0, "type": "number" }, "proteinG": { "maximum": 100000, "minimum": 0, "type": "number" }, "saltG": { "maximum": 100000, "minimum": 0, "type": "number" }, "saturatesG": { "maximum": 100000, "minimum": 0, "type": "number" }, "servingSize": { "maxLength": 40, "minLength": 1, "type": "string" }, "sodiumMg": { "maximum": 100000, "minimum": 0, "type": "number" }, "sugarsG": { "maximum": 100000, "minimum": 0, "type": "number" }, "transFatG": { "maximum": 100000, "minimum": 0, "type": "number" } }, "required": [ "basis" ], "type": "object" }, "product": { "additionalProperties": false, "properties": { "brand": { "maxLength": 120, "minLength": 1, "type": "string" }, "business": { "additionalProperties": false, "properties": { "address": { "maxLength": 300, "minLength": 1, "type": "string" }, "name": { "maxLength": 120, "minLength": 1, "type": "string" } }, "required": [ "name", "address" ], "type": "object" }, "dateLine": { "description": "Rendered verbatim, e.g. \"Best before: see base\".", "maxLength": 80, "minLength": 1, "type": "string" }, "description": { "maxLength": 400, "minLength": 1, "type": "string" }, "name": { "maxLength": 120, "minLength": 1, "type": "string" }, "netQuantity": { "additionalProperties": false, "properties": { "unit": { "enum": [ "g", "kg", "ml", "l", "oz", "fl oz", "lb", "pcs" ], "type": "string" }, "value": { "exclusiveMinimum": 0, "maximum": 100000, "type": "number" } }, "required": [ "value", "unit" ], "type": "object" }, "origin": { "maxLength": 80, "minLength": 1, "type": "string" }, "storage": { "maxLength": 200, "minLength": 1, "type": "string" } }, "required": [ "name" ], "type": "object" }, "ruleset": { "description": "eu-fic = EU Reg. 1169/2011 mandatory-particulars/x-height/allergen-emphasis/nutrition-order checks; us-fda = 21 CFR 101 PDP/type-size/FALCPA \"Contains:\"/Nutrition-Facts-order checks; generic = advisory x-height only, no mandatory-particulars checks.", "enum": [ "eu-fic", "us-fda", "generic" ], "type": "string" }, "style": { "additionalProperties": false, "properties": { "accent": { "default": { "rgb": "#000000" }, "oneOf": [ { "additionalProperties": false, "properties": { "rgb": { "pattern": "^#[0-9a-fA-F]{6}$", "type": "string" } }, "required": [ "rgb" ], "type": "object" }, { "additionalProperties": false, "properties": { "cmyk": { "items": { "maximum": 100, "minimum": 0, "type": "number" }, "maxItems": 4, "minItems": 4, "type": "array" } }, "required": [ "cmyk" ], "type": "object" } ] }, "background": { "default": { "rgb": "#ffffff" }, "oneOf": [ { "additionalProperties": false, "properties": { "rgb": { "pattern": "^#[0-9a-fA-F]{6}$", "type": "string" } }, "required": [ "rgb" ], "type": "object" }, { "additionalProperties": false, "properties": { "cmyk": { "items": { "maximum": 100, "minimum": 0, "type": "number" }, "maxItems": 4, "minItems": 4, "type": "array" } }, "required": [ "cmyk" ], "type": "object" } ] }, "fontFamily": { "default": "liberation-sans", "enum": [ "liberation-sans", "liberation-serif" ], "type": "string" }, "logoHeightMm": { "default": 10, "maximum": 50, "minimum": 3, "type": "number" }, "logoPngBase64": { "contentEncoding": "base64", "description": "PNG, base64, at most 256 KiB decoded, at most 2000 px per side; checked for a valid PNG signature and re-encoded before embedding.", "type": "string" }, "text": { "default": { "rgb": "#000000" }, "oneOf": [ { "additionalProperties": false, "properties": { "rgb": { "pattern": "^#[0-9a-fA-F]{6}$", "type": "string" } }, "required": [ "rgb" ], "type": "object" }, { "additionalProperties": false, "properties": { "cmyk": { "items": { "maximum": 100, "minimum": 0, "type": "number" }, "maxItems": 4, "minItems": 4, "type": "array" } }, "required": [ "cmyk" ], "type": "object" } ] } }, "type": "object" }, "warnings": { "default": [], "items": { "maxLength": 200, "minLength": 1, "type": "string" }, "maxItems": 20, "type": "array" } }, "required": [ "format", "ruleset", "product" ], "type": "object" }, "bodyType": { "enum": [ "json", "form-data", "text" ], "type": "string" }, "method": { "enum": [ "POST" ], "type": "string" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method", "bodyType", "body" ], "type": "object" }, "output": { "properties": { "example": { "$defs": { "check": { "additionalProperties": false, "properties": { "code": { "type": "string" }, "detail": { "maxLength": 4096, "type": "string" }, "status": { "enum": [ "passed", "failed", "not_checked" ], "type": "string" } }, "required": [ "code", "status", "detail" ], "type": "object" }, "textBox": { "additionalProperties": false, "properties": { "block": { "type": "string" }, "bold": { "type": "boolean" }, "fontSizePt": { "exclusiveMinimum": 0, "type": "number" }, "heightMm": { "minimum": 0, "type": "number" }, "lines": { "minimum": 0, "type": "integer" }, "widthMm": { "minimum": 0, "type": "number" }, "xHeightMm": { "minimum": 0, "type": "number" }, "xMm": { "type": "number" }, "yMm": { "type": "number" } }, "required": [ "block", "xMm", "yMm", "widthMm", "heightMm", "fontSizePt", "xHeightMm", "lines", "bold" ], "type": "object" } }, "$schema": "https://json-schema.org/draft/2020-12/schema", "additionalProperties": false, "properties": { "allergens": { "additionalProperties": false, "properties": { "detectedUnmarked": { "items": { "additionalProperties": false, "properties": { "ingredient": { "type": "string" }, "term": { "type": "string" } }, "required": [ "ingredient", "term" ], "type": "object" }, "type": "array" }, "marked": { "items": { "type": "string" }, "type": "array" } }, "required": [ "marked", "detectedUnmarked" ], "type": "object" }, "artifacts": { "items": { "additionalProperties": false, "properties": { "href": { "format": "uri", "type": "string" }, "mediaType": { "maxLength": 128, "minLength": 1, "type": "string" }, "name": { "enum": [ "label.pdf", "label.svg", "proof.png", "dieline.svg", "report.json" ], "type": "string" }, "sha256": { "pattern": "^[a-f0-9]{64}$", "type": "string" }, "sizeBytes": { "minimum": 0, "type": "integer" } }, "required": [ "name", "mediaType", "sizeBytes", "sha256", "href" ], "type": "object" }, "maxItems": 5, "type": "array" }, "barcode": { "additionalProperties": false, "properties": { "checkDigitValid": { "type": [ "boolean", "null" ] }, "data": { "type": "string" }, "heightMm": { "minimum": 0, "type": "number" }, "magnification": { "type": [ "number", "null" ] }, "moduleMm": { "minimum": 0, "type": "number" }, "quietZoneLeftMm": { "minimum": 0, "type": "number" }, "quietZoneRightMm": { "minimum": 0, "type": "number" }, "symbology": { "enum": [ "ean13", "upca", "qrcode", "datamatrix" ], "type": "string" }, "truncated": { "type": "boolean" }, "widthMm": { "minimum": 0, "type": "number" } }, "required": [ "symbology", "data", "checkDigitValid", "moduleMm", "magnification", "widthMm", "heightMm", "quietZoneLeftMm", "quietZoneRightMm", "truncated" ], "type": [ "object", "null" ] }, "checks": { "items": { "$ref": "#/properties/output/properties/example/$defs/check" }, "type": "array" }, "contrast": { "additionalProperties": false, "properties": { "accentOnBackground": { "minimum": 0, "type": "number" }, "textOnBackground": { "minimum": 0, "type": "number" } }, "required": [ "textOnBackground", "accentOnBackground" ], "type": "object" }, "expiresAt": { "format": "date-time", "type": "string" }, "fonts": { "additionalProperties": false, "properties": { "bold": { "type": "string" }, "family": { "enum": [ "liberation-sans", "liberation-serif" ], "type": "string" }, "regular": { "type": "string" } }, "required": [ "family", "regular", "bold" ], "type": "object" }, "format": { "additionalProperties": false, "properties": { "areaCm2": { "minimum": 0, "type": "number" }, "bleedMm": { "type": "number" }, "cornerRadiusMm": { "type": "number" }, "heightMm": { "type": "number" }, "safeMm": { "type": "number" }, "smallPack": { "description": "Trim area below the ruleset's small-pack threshold (EU FIC Art. 13(3): 80 cm²).", "type": "boolean" }, "widthMm": { "type": "number" } }, "required": [ "widthMm", "heightMm", "bleedMm", "safeMm", "cornerRadiusMm", "areaCm2", "smallPack" ], "type": "object" }, "layout": { "items": { "$ref": "#/properties/output/properties/example/$defs/textBox" }, "type": "array" }, "limitations": { "items": { "maxLength": 4096, "type": "string" }, "type": "array" }, "minimumXHeightMm": { "minimum": 0, "type": "number" }, "ruleset": { "enum": [ "eu-fic", "us-fda", "generic" ], "type": "string" }, "status": { "enum": [ "passed", "rejected" ], "type": "string" }, 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