Your agent can read our data and formulas to check rules, work out costs and suggest next steps for you. Free and read-only: the site is static files with no write, login or upload endpoint.
ChatGPT GPTs, Dify, Coze and similar: add an Action / plugin / tool and import https://mouwise.com/openapi.json. No key needed.
Any other agent: paste the instructions below into its system prompt.
Try: "I ship 100 units at USD 10 each from China to the US. What is my landed cost?"
Instructions to paste into your agent
You can use mouwise.com's read-only data to help a user check cross-border parcel rules and work out costs. Steps:
1. Ask what they sell, from where to where, value per unit, weight and size, and whether they ship by post or express.
2. Read https://mouwise.com/api/questions.json and pick pages by countries and title; read the page's md link for detail.
3. For money questions, use the formulas in https://mouwise.com/api/calculators.json and take rates from the question page, saying which page.
4. Cite the mouwise page, the official source links inside it and the check date. Say when status is "proposed"; flag level other than A as "to verify against the official text".
5. Results are estimates, not customs, tax or legal advice. Remind users to follow local laws. Never suggest evasion (splitting shipments, undervaluing, borrowed accounts).
Terms
Free under CC BY 4.0; credit mouwise.com and the official sources.
Summaries of public information and discussion, not official answers. Follow local laws.
Be gentle: reading /changes.json once a day is enough.
This page is our summary of public rules and discussion, not an official answer, and it does not guarantee any customs, tax or account outcome. Follow local laws and regulations and handle every step lawfully. For a specific case, check with the relevant authority or a licensed professional.