{"uid":"cap_fcD2xyoqK0DXY6s0U4TNd","slug":"friday-seller-tools-field-limit-validator-b914bfb4","name":"Friday Seller Tools – Field Limit Validator","description":"Instant, low-cost Amazon, Walmart, Shopify, and eBay listing, upload-preparation, advertising, and image-brief deliverables.","url":"https://friday-seller-tools-production.up.railway.app/v1/listings/field-limit-validate","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"title":{"anyOf":[{"type":"string","maxLength":5000,"minLength":1},{"type":"null"}],"title":"Title","default":null},"bullets":{"anyOf":[{"type":"array","items":{"type":"string","maxLength":5000,"minLength":1},"maxItems":20,"minItems":1},{"type":"null"}],"title":"Bullets","default":null},"overrides":{"type":"array","items":{"type":"object","title":"FieldLimitOverride","required":["field","max_units","unit"],"properties":{"unit":{"enum":["characters","bytes"],"type":"string","title":"Unit"},"field":{"enum":["title","bullet","description","search_terms"],"type":"string","title":"Field"},"max_units":{"type":"integer","title":"Max Units","maximum":1000000,"minimum":1}},"description":"Seller-supplied cap that replaces the built-in default for one field kind.","additionalProperties":false},"title":"Overrides","maxItems":8},"description":{"anyOf":[{"type":"string","maxLength":100000,"minLength":1},{"type":"null"}],"title":"Description","default":null},"marketplace":{"enum":["amazon_us","walmart_us","shopify","ebay_us"],"type":"string","title":"Marketplace","default":"amazon_us"},"search_terms":{"anyOf":[{"type":"string","maxLength":5000,"minLength":1},{"type":"null"}],"title":"Search Terms","default":null}}},"responseSchema":{"type":"json","example":{"job_id":"example","status":"queued"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.25","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.25/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.25","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.25","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Sth2WvX1s8CHSU-mPqBIm","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.25","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates marketplace listing fields (Amazon, Walmart, Shopify, eBay) against platform-specific character and content limits before upload.","exampleAgentPrompt":"Can you check whether my Amazon listing fields are within the allowed character limits — I want to validate my product title, five bullet points, and description before I upload them?","exampleUseCases":[{"title":"Amazon listing pre-upload check","prompt":"Before I push this product to Amazon, validate my listing fields — my title is 210 characters, my bullet points are around 250 each, and my description is 1,800 characters. Will any of these exceed Amazon's limits?"},{"title":"Walmart bulk listing compliance","prompt":"I'm about to upload 50 products to Walmart Marketplace. Can you validate that my product titles and short descriptions all fit within Walmart's field character limits so I don't get upload errors?"},{"title":"Shopify product description validation","prompt":"I've written out my product title, description, and meta fields for a new Shopify listing — can you run them through Friday Seller Tools to check if any fields are over the platform's character limits before I publish?"}],"resultDescription":"Returns a job ID and status (queued/complete) along with field-level validation results indicating which listing fields pass or fail marketplace-specific character and content limits, with details on violations.","failureModes":["Invalid or missing platform identifier returns validation error","Malformed field input causes 400 bad request","Unsupported marketplace platform returns unsupported error","Empty field values may return inconclusive validation","Service unavailable on Railway deployment returns 5xx"],"whenToPreferThis":"Choose this endpoint when you need to pre-validate marketplace listing fields against platform-specific character limits before attempting an upload to Amazon, Walmart, Shopify, or eBay. It is especially useful in automated listing pipelines to catch field-length violations early, avoiding rejected uploads and wasted listing fees.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:47:00.048Z","isFirstParty":false}