AI Negotiation · USDC on Base L2

AI negotiates.You keep more.

Haggle is the standard for AI-powered negotiation. Your agent bargains, the smart contract settles — 1.5% total fee, non-custodial, final in seconds.

Try AI Negotiation →Try Trade Tutorial

01Scroll to watch platform fees peel off →

Poshmark Seller Receipt

Order #PM-88217 · payout 3–5 days

ItemiPhone 14 Pro 128GB

Sale price$500.00

YOU RECEIVE$400.00

Payout in 3–5 business days

Poshmark · $400.00→Haggle · $492.50+$92.50

Payments on Base L2

USDC Settlement

Non-custodial

Delaware LLC

Linux Foundation

The fee problem

Platform feesare eatingyour profits.

Drag the slider — watch every platform bite you. Except one.

Sale price

$500

Platform	Fee %	You receive	Lost to fees

The average seller loses $847 per year to platform fees.

Based on 12 sales/year at $500 avg price · Haggle saves you $759.

How it works

3steps1fair price∞instant settlement

STEP 01

List in 30 seconds

Take a photo. Set your price. Our AI suggests optimal pricing from live market data — so you don't undersell.

[ product shot ]

Suggested$520

STEP 02

AI negotiates — fairly

Both buyer and seller get their own agent with equal data. No one-sided advantage. Deals land in seconds.

Offer $430 — battery 89%

Counter at $465 — screen mint

Meet at $450?

✓ Deal @ $450

STEP 03

Instant, non-custodial

USDC routes directly from buyer to seller via smart contract. Haggle literally cannot hold your money.

Buyer$450

Settlement
Router

Seller$443.25

1 block · 2stx 0x8f2a…b7c1

On-chain settlement

Non-custodial.Transparent.Atomic.

One signed transaction. One block. Funds split at the contract level — Haggle never touches the principal.

Buyer wallet

0x9A1…fE4B

−$450.00

Settlement Router

HaggleRouter.sol

EIP-712 · verified

Seller wallet · 98.5%

0x2C8…A091

+$443.25

Haggle fee · 1.5%

0xFee…Haggle

+$6.75

SIGNATURE

EIP-712 typed

Human-readable structured signatures, not blind blobs.

ATOMIC

One tx, one block

Either everyone gets paid, or nothing moves.

GAS

Open-source contracts

Audited, verified, reproducible from source.

Two ways to pay

Crypto-native speed. Card-friendly access.

Recommended

USDC Direct

Already have crypto in your wallet? Pay with one signature. No middleman, no reroute.

Total fee

1.5%

Speed

~2s

Custody

None

Card Payment

No wallet? No problem. Pay with any card — we convert to USDC under the hood via Stripe Crypto Onramp.

Total fee

3.0%

Speed

~30s

Stripe

Buyer protection

Your money is protected at every step.

Funds are held by the smart contract — not Haggle. Released to the seller only after you confirm delivery.

Payment

t=0s

Escrow locked

smart contract

Delivery

APV verified

24h Review

buyer window

Release

or dispute

01 · Escrow

Funds locked in the Settlement Router contract — not in Haggle's bank account.

02 · APV

Weight-buffer verification confirms the package sent matches what was sold.

03 · Review

Buyer has 24h to approve. Silence is consent — funds release automatically.

04 · Dispute

3-tier resolution: auto-arbiter → review panel → binding arbitration, with on-chain evidence.

For developers

Built on open protocols.

✓ x402 — payment protocol (Linux Foundation)
✓ MCP — ChatGPT & Claude can list items directly
✓ REST API — drop-in negotiation for any marketplace
✓ HNP — open Haggle Negotiation Protocol spec

# Start an AI-negotiated session in one call
POST /v1/negotiations/sessions
{
  "listing_id": "lst_iPhone14Pro_8fa2",
  "buyer_strategy": "balanced",
  "max_price": 475,
  "rail": "usdc"
}

→ AI negotiates. Smart contract settles.
→ Webhook fires when deal is done.

event settlement.completed {
  final_price: 450.00,
  seller_received: 443.25,
  tx: "0x8f2a…b7c1"
}

Company

Built in Delaware. Backed by protocol.

Legal entityHaggle LLC

JurisdictionDelaware, USA

Domaintryhaggle.ai

Contacthello@tryhaggle.ai

Settlement chainBase L2 · ChainID 8453

Protocolx402 · HNP v0.3

“Everyone deserves to negotiate fairly — not just the rich, the aggressive, or the experienced.”

Haggle mission · democratizing negotiation

Stop losing money to platform fees.

eBay · you get $410.15→Haggle · you get $492.50+$82.35

Try AI Negotiation — Free Demo Try Trade Tutorial

Early members get fee-free trades for life.