{"uid":"cap_C8Co8pl3PKwMOgL7MpDy-","slug":"sindri-arithmetic-expression-evaluator-8fb71813","name":"Sindri Arithmetic Expression Evaluator","description":"Safe arithmetic expression evaluator. Parses and evaluates expressions with +, -, *, /, ^, and parentheses using a bounded-recursion parser (no eval/Function), avoiding the arithmetic slips an LLM makes on long expressions.","url":"https://x402.outpimp.com/evaluateExpression","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"expression":{"type":"string","description":"Arithmetic expression to evaluate, e.g. \"(2 + 3) * 4\". Max 200 characters."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5iESBMBLAGeLGVa2pQ8pN","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Parses and evaluates arithmetic expressions (+, -, *, /, ^, parentheses) using a safe bounded-recursion parser with no eval or Function calls, avoiding LLM arithmetic errors.","exampleAgentPrompt":"Can you calculate (17 + 8) * (3^4 - 15) / 6 for me? I need a precise answer, not an estimate.","exampleUseCases":[{"title":"Verify complex formula result","prompt":"What is the result of ((142 * 37) + 589) / (2^8 - 12)? I need the exact number, not your best guess."},{"title":"Step-by-step budget arithmetic","prompt":"Can you work out (3500 - 1200 - 475 - 88.50) * 12 for me? That's my annual savings estimate after expenses."},{"title":"Exponent-heavy scientific calculation","prompt":"Compute (6.022 * 10^23) * (1.38 / 10^23) for me — I need the precise product."}],"resultDescription":"A numeric value representing the evaluated result of the input arithmetic expression, computed deterministically via a safe recursive-descent parser without using JavaScript eval or Function constructors.","failureModes":["Expression exceeds 200 character limit — returns an error","Unsupported operators or non-arithmetic syntax (e.g. trig functions) — returns a parse error","Division by zero — returns an error","Malformed parentheses or invalid expression syntax — returns a parse error","Payment not included or invalid — returns HTTP 402"],"whenToPreferThis":"Prefer this endpoint when you need a guaranteed-correct numeric answer to an arithmetic expression and cannot trust an LLM's own arithmetic (especially for long expressions, chained operations, or expressions with exponents). Ideal for agents that must compute precise financial, scientific, or logical values from formula strings without exposing themselves to code-injection risks of eval-based approaches.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:34:09.741Z","isFirstParty":false}