{"uid":"cap_egzHlb_pKTKYPbf1UXAwL","slug":"international-address-formats-po-box-heuristic-check-3cc191bb","name":"International Address Formats – PO Box Heuristic Check","description":"Heuristic check whether an address line uses PO box wording in English, German, French, Spanish and more; not proof.","url":"https://address-formats.x402tookit.com/po-box-check?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":["text"],"properties":{"text":{"type":"string","description":"An address line, e.g. 'P.O. Box 123'"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"input":{"type":["null","string"]},"source":{"type":["null","string"]},"matches":{"type":["array","null"],"items":{"type":"object","properties":{"weak":{"type":["boolean","null"]},"pattern":{"type":["null","string"]},"language":{"type":["null","string"]},"matchedText":{"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"}},"dataSnapshot":{"type":["null","string"]},"languagesCovered":{"type":["array","null"],"items":{"type":"string"}}}}}}}},"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_BUKj_cwaF5h5HhGKSLrPY","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":"Heuristically detects whether an address line contains PO box wording across multiple languages including English, German, French, and Spanish.","exampleAgentPrompt":"Can you check if this address line looks like a PO box — 'Postfach 4521, 80331 München' — and tell me what language the pattern matched in?","exampleUseCases":[{"title":"E-commerce PO box shipping filter","prompt":"I need to check whether the address 'Apartado Postal 789, Ciudad de México' is a PO box before I process this order — we can't ship physical goods to PO boxes."},{"title":"CRM data cleansing for address type","prompt":"Can you scan this address line 'Boîte Postale 42, 75001 Paris' and tell me if it matches any PO box patterns, including what language and how confident the match is?"},{"title":"KYC address screening for physical location","prompt":"For compliance, I need to verify that 'P.O. Box 1138, London EC1A 1BB' is actually a PO box and not a physical address — can you run the heuristic check and give me the verdict with reasons?"}],"resultDescription":"Returns a verdict (e.g. 'is PO box' or 'not detected'), matched patterns with their language labels and weak/strong flags, a human-readable summary, a disclaimer about heuristic accuracy, the list of languages covered by the check, and any reasons or caveats. May include a degraded flag if some checks could not be performed.","failureModes":["Missing required 'text' query parameter returns an error","Ambiguous or abbreviated address text may produce false negatives (heuristic, not proof)","Very short or single-character input may yield no pattern matches","Language not in the supported set may return no match even for genuine PO boxes","Degraded flag may be set if internal pattern data was partially unavailable"],"whenToPreferThis":"Use this endpoint when you need a fast, lightweight heuristic signal about whether an address line is a PO box across multiple languages — particularly when input addresses may be in English, German, French, Spanish, or other European languages. Prefer this over a full address validation service when the only question is PO box vs. physical address, and when a heuristic (non-authoritative) check is sufficient. Not suitable when you need guaranteed accuracy or official postal verification.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-02T12:30:50.262Z","isFirstParty":false,"canonicalSlug":"international-address-formats-po-box-heuristic-check-3cc191bb"}