{"uid":"cap_7gh51vvoGdSLO6DgTFD_R","slug":"x402-toolbox-character-frequency-analyzer-90803350","name":"x402-toolbox Character Frequency Analyzer","description":"309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.","url":"https://x402-toolbox.shablony-pro.workers.dev/text/character-frequency?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"schema":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"paid":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_qFE4Z7azr9aU8Z8wnb_m6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Counts the frequency of each character in a given text string and returns a frequency map","exampleAgentPrompt":"Can you count how often each character appears in this string: 'Hello, World! How are you today?'","exampleUseCases":[{"title":"Cipher and frequency analysis","prompt":"I need to figure out the character frequency distribution of this ciphertext so I can attempt a frequency analysis attack: 'Wkh txlfn eurzq ira mxpsv ryhu wkh odcb grj'"},{"title":"Language detection preprocessing","prompt":"Count how many times each character appears in this French sentence so I can compare the distribution against known language profiles: 'Le renard brun rapide saute par-dessus le chien paresseux'"},{"title":"Text uniqueness scoring","prompt":"Give me the character frequency breakdown for this product description so I can check how repetitive the writing is: 'Great quality great value great product great brand great experience'"}],"resultDescription":"A JSON object with ok:true and paid:true, along with a map of each character to the number of times it appears in the input text, allowing the agent to see the full frequency distribution of all characters.","failureModes":["Missing or empty input text returns an error or empty frequency map","Invalid schema parameter format may result in a bad request response","Payment failure via x402 returns HTTP 402 and the call is not executed","Extremely long strings may hit Cloudflare Workers request size limits"],"whenToPreferThis":"Choose this endpoint when you need a deterministic, pay-per-call character frequency computation with no API key or signup required. Ideal for AI agents operating autonomously with USDC on Base that need lightweight text analytics primitives. Prefer over heavier NLP APIs when you only need character-level statistics, not word or sentence analysis.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:48:56.251Z","isFirstParty":false,"canonicalSlug":"x402-toolbox-character-frequency-analyzer-90803350"}