Arc Bridge

What it really costs to bring USDC into Arc over Circle CCTP, measured from arrivals rather than quoted.

Overview

What it really costs to bring USDC into Arc over Circle CCTP, measured from arrivals rather than quoted. Every arrival we hold with its recipient, the amount credited, the fee CCTP took and the transaction, plus observed fees grouped by transfer size. Read from MintAndWithdraw on TokenMessengerV2 [redacted], whose event signature we verified by hashing it rather than assuming it, and filtered to the USDC contract on every single log. The cost is punishing at small size: measured 2026-09-17, one arrival received 0.500000 USDC after a 1.000000 USDC fee on 1.5 sent, which we confirmed independently from that transaction native transfer logs. These are fees we observed. We do not model or predict Circle fees and this is not a quote. A size bucket with fewer than 5 arrivals reports its count and no median rather than a number built on two rows.

Endpoint

Method	Endpoint	Price	Description
GET	/v1/marketplace/api/arc-bridge	$0.0046	Invoke Arc Bridge (Developer) and return the upstream response.

How to call it

Requests are paid per call over the x402 protocol. Call the endpoint, receive a 402 Payment Required quote, then repeat the request with the signed payment header. The SDKs do both steps for you.

# 1. Ask for a quote
curl -i https://api.jarvisclaw.ai/v1/marketplace/api/arc-bridge

# 2. Pay it (the SDK signs and retries for you)
curl -H "X-PAYMENT: <signed-payload>" https://api.jarvisclaw.ai/v1/marketplace/api/arc-bridge

Open in the marketplace