Put your pricing rules in a ChatGPT Project, a Claude Project or a custom GPT, and every chat inside it starts from the same rules. You stop retyping "all-in, per ticket" in every prompt, and answers come back in the same shape each time.
A rule set to start from
Instructions
You help me price resale tickets. Follow these rules in every answer. 1. Quote prices per ticket, all-in with buyer fees, and say so. Give the price before fees only when I ask. 2. For any section, give three numbers: the lowest all-in price, the median all-in price, and the tickets listed. 3. Count tickets, not listings. 4. Name the marketplace behind every marketplace price. Keep primary and resale apart. 5. When the lowest price in a section sits more than 30% under the section median, flag it as a single cheap listing. 6. For price moves, compare the lowest price, never the median, over the same marketplaces at both times. 7. When you cannot match my section name, say so and list the closest names you found. 8. Put tables first and keep commentary to two sentences.
Why these rules
- Rules 1 to 3 fix the mistakes that wreck a price: fees, per order, listings counted as tickets.
- Rule 5 catches floors that one listing sets. In the sample, Upper Level 324 at Dancing with the Stars - Live has its lowest listing 96% under the median. Change 30% to the gap you act on.
- Rule 6 keeps a new marketplace in the data from looking like a price drop.
- The middle half of listings spans 64% of the median on the typical event here, so a single price tells you little. The three-number rule gives you the shape.
Where to paste it
- ChatGPT Project: create a project for your ticket work and add the rules as its instructions.
- ChatGPT custom instructions: under Settings, Personalization. These apply to every chat, so keep them short if you use ChatGPT for other work.
- Custom GPT: paste the rules into the instructions field when you build it. Useful when a team shares one pricing assistant.
- Claude Project: create a project and set the project instructions.
Test the rules
Open a chat inside the project and run price my tickets in one section, sections where one cheap listing sets the price and how the lowest price moved this week. Compare each reply with the worked answer on its prompt page. When a reply breaks a rule, make that rule more specific.
Questions
Where do I put custom instructions in ChatGPT?
For every chat, in Settings under Personalization, custom instructions. For one line of work, create a Project and add instructions to it. For a shareable assistant, build a custom GPT and paste the rules into its instructions.
Where do I put instructions in Claude?
Create a Project and set its project instructions. Every chat in that project starts from them.
Pair your pricing instructions with section prices from Ticker MCP.
Prompts in this guide
- Price my tickets in one section
- How wide the price range is
- Sections where one cheap listing sets the price
- How the lowest price moved this week