{"uid":"cap_IwLZc2KPk2DbSIzMX9NtB","slug":"paper-print-calc-envelope-fit-checker-13f16597","name":"Paper & Print Calc – Envelope Fit Checker","description":"Which standard envelopes (#10, A2, A7, C5, DL, C6 and more) hold a card or folded sheet, with the margin left over.","url":"https://paper-print-calc.x402tookit.com/envelope-fit?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["width","height"],"properties":{"unit":{"type":"string","description":"in (default) or mm"},"width":{"type":"number","description":"Width of the flat or folded piece"},"height":{"type":"number","description":"Height of the piece"},"clearance":{"type":"number","description":"Minimum gap on every side, in the same unit (default 0.125 in, or 3 mm)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"fits":{"type":["array","null"],"items":{"type":"object","properties":{"sizeMm":{"type":["array","null"],"items":{"type":"number"}},"envelope":{"type":["null","string"]},"sizeInches":{"type":["array","null"],"items":{"type":"number"}},"marginPerSideInches":{"type":["null","number"]}}}},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"pieceInches":{"type":["array","null"],"items":{"type":"number"}},"snuggestFit":{"type":["null","string"]},"clearanceInches":{"type":["null","number"]},"envelopesChecked":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_c5Xyu0XyRx0881Xi_bH8G","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Given a card or folded sheet's dimensions, returns which standard envelopes (#10, A2, A7, C5, DL, C6, etc.) it will fit into, along with the margin left on each side.","exampleAgentPrompt":"I have a folded card that's 4.25 inches wide by 5.5 inches tall — which standard envelopes (#10, A2, A7, etc.) will it fit in, and how much margin will be left on each side?","exampleUseCases":[{"title":"Choosing envelope for a greeting card","prompt":"I'm printing greeting cards that are 5 inches wide by 7 inches tall. Which standard envelopes will fit them with at least an eighth-inch clearance on every side?"},{"title":"Wedding invitation envelope sizing","prompt":"My wedding invitations fold down to 139mm wide by 99mm tall. Can you tell me which standard envelopes — like C5, DL, or C6 — they'll slip into, and which one is the snuggest fit? Use millimeters."},{"title":"Direct mail brochure envelope check","prompt":"We're doing a direct mail campaign with a tri-fold brochure that's 3.875 inches wide and 8.75 inches tall when folded. Which standard envelopes will it fit in?"}],"resultDescription":"Returns an array of matching envelope names (e.g. #10, A7, C5) with their dimensions in both inches and mm, the margin per side in inches for each, the snuggest-fitting envelope, a plain-English summary verdict, reasons why certain envelopes were excluded, the total number of envelopes checked, and the clearance used.","failureModes":["Missing required width or height query parameters returns an error","Non-numeric width/height values cause a validation failure","Extremely small or large dimensions outside any standard envelope range return an empty fits array","Invalid unit value (not 'in' or 'mm') may produce unexpected behavior"],"whenToPreferThis":"Use this endpoint when you need to programmatically determine which off-the-shelf standard envelopes (#10, A2, A7, C5, DL, C6, etc.) can hold a specific card or folded sheet, including margin clearance data. Ideal for print-production workflows, stationery design tools, direct-mail campaign planning, or any scenario where you need to match a physical piece to a standard envelope size without manual lookup tables.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-03T18:33:48.232Z","isFirstParty":false,"canonicalSlug":"paper-print-calc-envelope-fit-checker-13f16597"}