create_upi_payment_link
Create UPI payment link
Create a UPI payment link (upi://pay) for an Indian UPI ID. On a phone it opens PhonePe, Google Pay, Paytm, BHIM or any UPI app with the payee, amount and note filled in. Use it to collect a payment, split a bill or put on an invoice. Returns the link and a proupiqr.in page with its QR code and printable poster. Amounts are exact to the paisa; nothing is stored. It never moves money: the payer approves the payment in their own UPI app.
输入参数noteamountupi_id必填payee_name必填
generate_upi_qr_code
Generate UPI QR code
Generate a UPI payment QR code (PNG image) for an Indian UPI ID that PhonePe, Google Pay, Paytm, BHIM and every UPI app can scan, optionally with a fixed amount and note. Also returns the upi:// link and a proupiqr.in page to download a printable counter poster or stickers. Nothing is stored. It never moves money: the payer approves the payment in their own UPI app.
输入参数notesizeamountupi_id必填payee_name必填
read_upi_link
Read and check a UPI link
Read a UPI payment link (the upi://pay… text inside a payment QR code) and check it: who gets paid, the amount, the note and any merchant fields, with warnings about anything malformed or risky, such as an AutoPay mandate posing as a payment. Use it before paying from a QR someone sent, or to find out why apps reject a QR.
输入参数link必填
explain_upi_error
Explain a UPI error code
Explain a failed UPI payment from its error code or message (e.g. U30, ZM, XH, Z9, U16, or "debit has been failed"): what it means, which side caused it, whether money was debited and when it comes back, and what the payer or merchant should do next. Covers 42 common NPCI and bank codes.
输入参数code必填
calculate_gst
Calculate GST
Calculate Indian GST on an amount, exact to the paisa: add GST to a price before tax, or take it out of a GST-inclusive price, split into CGST + SGST (sale within a state) or IGST (between states).
输入参数amount必填supplyrate_percent必填price_includes_gst
calculate_msmed_interest
Calculate MSMED late-payment interest
Calculate the interest a buyer owes a micro or small enterprise (Udyam-registered supplier) for paying late, under Section 16 of India's MSMED Act: three times the RBI Bank Rate (17.25% a year as of 7 Oct 2026), compounded monthly, from the day after the payment deadline (the agreed credit period, at most 45 days). Exact to the paisa.
输入参数amount必填paid_oncredit_daysinvoice_date必填
calculate_upi_mdr
Calculate UPI MDR
Work out the UPI merchant discount rate (MDR) on a payment under the rules from 15 October 2026: 0.4% on person-to-merchant UPI payments above ₹2,000 (capped at ₹300), a flat ₹5 for essential-sector merchants and 0.02% for capital markets. Person-to-person payments, payments of ₹2,000 or less and small P2PM merchants (up to ₹1 lakh a month) pay nothing. Shows the 18% GST on the MDR and what the merchant keeps.
输入参数amount必填categorygst_registeredsmall_merchant
amount_in_words
Rupee amount in words
Write a rupee amount in words the Indian way (lakh and crore), as on invoices, receipts and cheques. For example 125050.50 → "One Lakh Twenty Five Thousand Fifty Rupees and Fifty Paise Only".
输入参数amount必填
find_merchant_tools
Find a free Pro UPI QR tool
Find the free Pro UPI QR tool for a task: invoices, receipts, rent receipts, salary slips, quotations, GST and MSME tools, UPI QR posters and stickers, calculators and guides. Returns matching tools with links; they run in the browser with no signup.
输入参数limitquery必填
