Let your shopping agent haggle with the seller before it pays
Agents can pay for things but don't bargain, so for the PayBox hackathon he built Haggle, a plugin that lets your agent negotiate with a seller instead of accepting the first price, inspired by Nigerian markets.
Source
@ferz_erz00 on X · 2026-10-17
Written in our own words. Credit to the original author. Link checked 2026-10-18.
What they did
Agents can pay for things but don't bargain, so for the PayBox hackathon he built Haggle, a plugin that lets your agent negotiate with a seller instead of accepting the first price, inspired by Nigerian markets.
Result (as claimed)
Hackathon plugin.
Tools they used
Cost: Pricing depends on the tools you pick; check each official pricing page.
Set it up
Gather the documents
Collect statements, bills, invoices or tax documents for the period you want reviewed.
Ask for an audit, not actions
Have PayBox list findings, amounts and suggested next steps before it does anything.
Approve each action
Approve cancellations, disputes or payments one at a time. Never give an agent open-ended access to move money.
Track the result
Record what changed and what you saved so you can check it next month. This is not financial advice.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Let your shopping agent haggle with the seller before it pays What the original author did: Agents can pay for things but don't bargain, so for the PayBox hackathon he built Haggle, a plugin that lets your agent negotiate with a seller instead of accepting the first price, inspired by Nigerian markets. Reported result (as claimed by the author): Hackathon plugin. Source: https://x.com/ferz_erz00/status/2111569135977324641 Tools they used: PayBox Category: Money Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Let your shopping agent haggle with the seller before it pays What the original author did: Agents can pay for things but don't bargain, so for the PayBox hackathon he built Haggle, a plugin that lets your agent negotiate with a seller instead of accepting the first price, inspired by Nigerian markets. Reported result (as claimed by the author): Hackathon plugin. Source: https://x.com/ferz_erz00/status/2111569135977324641 Tools they used: PayBox Category: Money Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Let your shopping agent haggle with the seller before it pays What the original author did: Agents can pay for things but don't bargain, so for the PayBox hackathon he built Haggle, a plugin that lets your agent negotiate with a seller instead of accepting the first price, inspired by Nigerian markets. Reported result (as claimed by the author): Hackathon plugin. Source: https://x.com/ferz_erz00/status/2111569135977324641 Tools they used: PayBox Category: Money Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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Guides for this use case
How to run multiple coding agents together · How to use AI agents for errands, calls and shopping · How to use Claude Code skills and plugins
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