{"slug":"api-paidpilot-io-v1-late-fee-cc3f97","title":"PaidPilot Invoice API","host":"api.paidpilot.io","method":"POST","resource":"https://api.paidpilot.io/v1/late-fee","category":"other","description":"PaidPilot Invoice API: Late fee on an overdue invoice. Flat fee, monthly % or annual %, simple or compounding, with grace days. Returns days late, fee, new total and a paste-ready invoice line. Optional US state for the legal note. Not legal advice; state caps are NOT looked up.","price_listed":0.01,"price_asked":0.01,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":27,"reported_calls_30d":3,"reported_payers_30d":2,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"amount":1610.35,"as_of":"2026-10-11","compounding":false,"currency":"USD","due_date":"2026-09-01","fee_type":"monthly_percent","grace_days":5,"rate_percent":1.5,"state":"NE"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"$schema":"https://json-schema.org/draft/2020-12/schema","additionalProperties":false,"properties":{"amount":{"description":"Unpaid invoice amount","exclusiveMinimum":0,"maximum":1000000000,"type":"number"},"as_of":{"description":"Date paid, or the date to calculate to, YYYY-MM-DD (default: today, UTC)","pattern":"^\\d{4}-\\d{2}-\\d{2}$","type":"string"},"compounding":{"default":false,"description":"false = simple interest (default); true = compounds (monthly: per 30 days; annual: daily)","type":"boolean"},"currency":{"default":"USD","description":"ISO-4217, default USD","type":"string"},"due_date":{"description":"Invoice due date, YYYY-MM-DD","pattern":"^\\d{4}-\\d{2}-\\d{2}$","type":"string"},"fee_type":{"description":"flat = one fixed fee; monthly_percent e.g. 1.5; annual_percent e.g. 18","enum":["flat","monthly_percent","annual_percent"],"type":"string"},"flat_fee":{"description":"Flat fee; required for fee_type=flat, optional one-time add-on otherwise","maximum":1000000,"minimum":0,"type":"number"},"grace_days":{"default":0,"description":"Days after the due date before any fee applies","maximum":365,"minimum":0,"type":"integer"},"rate_percent":{"description":"Rate for monthly_percent / annual_percent","maximum":100,"minimum":0,"type":"number"},"state":{"description":"US state (2-letter) for the legal note","type":"string"}},"required":["amount","due_date","fee_type"],"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-18","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.01,"price_match":true,"latency_ms":27,"error":null}],"description_full":"PaidPilot Invoice API: Late fee on an overdue invoice. Flat fee, monthly % or annual %, simple or compounding, with grace days. Returns days late, fee, new total and a paste-ready invoice line. Optional US state for the legal note. Not legal advice; state caps are NOT looked up.","last_updated":"2026-10-15T15:20:44.723Z","schemes":["exact"]}