How do I install the Bridge skill?

Run npx skillmds@latest add jiayaoqijia/bridge in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Bridge safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Bridge?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Bridge free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Bridge?

jiayaoqijia (@jiayaoqijia) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Bridge by jiayaoqijia — Agent Skill

Name: Bridge
Author: jiayaoqijia

Bridge

Cross-chain bridging via the ChainGPT plugin. Across Protocol v3 — the highest-volume intent-based bridge by quote count. 10 EVM mainnets supported. Custody-free: plugin builds the unsigned depositV3 transaction; user signs externally on the origin chain, then a relayer fills on destination ~seconds later. Triggers: bridge, cross-chain, move from base to ethereum, send to arbitrum, L2 to L1, bridge USDC, optimism to polygon.

jiayaoqijia 8c336b6 4 files · 6.9 KB Updated Sep 17, 2026

File contents

ChainGPT Bridge Skill

You move funds between EVM mainnets via Across Protocol v3. Intent-based — once the deposit lands on the origin chain, a relayer (Across calls them "fillers") provides the destination liquidity within seconds. Fees: capital + relay gas + LP, all returned in the quote.

Tools

Tool	Purpose
`chaingpt_bridge_quote`	Fees + estimated fill time + SpokePool addresses
`chaingpt_bridge_build_deposit_tx`	Unsigned `depositV3` tx (refuses mainnet w/o ack)
`chaingpt_bridge_status`	Track a deposit by origin-chain tx hash

The mandatory pipeline

chaingpt_bridge_quote
       │  (surface fees + fill time to user)
       ▼
chaingpt_dex_approve_tx token=<inputToken> spender=<spokePoolAddress from quote> acknowledgeMainnet=true
       │  (skip if inputToken is native — ETH/MATIC/etc.)
[user signs the approval]
       │
       ▼
chaingpt_bridge_build_deposit_tx (requires acknowledgeMainnet=true)
[user signs the deposit on the ORIGIN chain]
       │  (~seconds later)
       ▼
chaingpt_bridge_status depositTxHash=<hash>
       │  (returns destination fill tx hash once relayer fills)
       ▼
chaingpt_onchain_tx hash=<destination fill hash> chain=<destination>

Supported networks

Ethereum · Base · Arbitrum · Optimism · Polygon · BSC · Avalanche · Blast · Linea · Scroll. Any pair of these can be bridged.

Key behavior

Fee math: input − relay_fee − lp_fee = output. The quote returns the exact outputAmount needed to keep the relayer profitable. Don't modify it.
Native vs ERC-20: native bridging (ETH→ETH on a different chain) is value-bearing; the deposit tx must include value: inputAmount. ERC-20 sets value: 0 and uses the prior approval.
Exclusivity: each quote names an exclusiveRelayer for the first exclusivityDeadline seconds. Other relayers can fill after.
Fill deadline: defaults to 4 hours. If unfilled by then, the depositor can be refunded.

What this skill does NOT do

Bridge to/from Solana, Sui, Aptos, or any non-EVM chain. Across is EVM-only.
Bridge tokens that don't exist on both chains (e.g., a Base-native memecoin to Ethereum). The output token must already be deployed on the destination.
Refund stuck deposits. After fillDeadline, the user has to call requestSlowFillV3 separately — not yet a tool in this plugin.

Credit accounting

All bridge tools cost 0 ChainGPT credits — Across is free. Credit funnel comes from upstream chaingpt_intel_token (the user typically wants to research the destination token before bridging) or chaingpt_audit_contract (for unfamiliar destination contracts).

Reference

Across v3 docs: https://docs.across.to
SpokePool ABI: this skill uses depositV3(depositor, recipient, inputToken, outputToken, inputAmount, outputAmount, destinationChainId, exclusiveRelayer, quoteTimestamp, fillDeadline, exclusivityDeadline, message)

---name: bridgedescription: Cross-chain bridging via the ChainGPT plugin. Across Protocol v3 — the highest-volume intent-based bridge by quote count. 10 EVM mainnets supported. Custody-free: plugin builds the unsigned depositV3 transaction; user signs externally on the origin chain, then a relayer fills on destination ~seconds later. Triggers: bridge, cross-chain, move from base to ethereum, send to arbitrum, L2 to L1, bridge USDC, optimism to polygon.---# ChainGPT Bridge SkillYou move funds between EVM mainnets via Across Protocol v3. Intent-based — once the deposit lands on the origin chain, a relayer (Across calls them "fillers") provides the destination liquidity within seconds. Fees: capital + relay gas + LP, all returned in the quote.## Tools| Tool | Purpose ||---|---|| `chaingpt_bridge_quote` | Fees + estimated fill time + SpokePool addresses || `chaingpt_bridge_build_deposit_tx` | Unsigned `depositV3` tx (refuses mainnet w/o ack) || `chaingpt_bridge_status` | Track a deposit by origin-chain tx hash |## The mandatory pipeline```textchaingpt_bridge_quote │ (surface fees + fill time to user) ▼chaingpt_dex_approve_tx token=<inputToken> spender=<spokePoolAddress from quote> acknowledgeMainnet=true │ (skip if inputToken is native — ETH/MATIC/etc.)[user signs the approval] │ ▼chaingpt_bridge_build_deposit_tx (requires acknowledgeMainnet=true)[user signs the deposit on the ORIGIN chain] │ (~seconds later) ▼chaingpt_bridge_status depositTxHash=<hash> │ (returns destination fill tx hash once relayer fills) ▼chaingpt_onchain_tx hash=<destination fill hash> chain=<destination>```## Supported networksEthereum · Base · Arbitrum · Optimism · Polygon · BSC · Avalanche · Blast · Linea · Scroll. Any pair of these can be bridged.## Key behavior- **Fee math**: input − relay_fee − lp_fee = output. The quote returns the exact `outputAmount` needed to keep the relayer profitable. Don't modify it.- **Native vs ERC-20**: native bridging (ETH→ETH on a different chain) is value-bearing; the deposit tx must include `value: inputAmount`. ERC-20 sets `value: 0` and uses the prior approval.- **Exclusivity**: each quote names an `exclusiveRelayer` for the first `exclusivityDeadline` seconds. Other relayers can fill after.- **Fill deadline**: defaults to 4 hours. If unfilled by then, the depositor can be refunded.## What this skill does NOT do- Bridge to/from Solana, Sui, Aptos, or any non-EVM chain. Across is EVM-only.- Bridge tokens that don't exist on both chains (e.g., a Base-native memecoin to Ethereum). The output token must already be deployed on the destination.- Refund stuck deposits. After `fillDeadline`, the user has to call `requestSlowFillV3` separately — not yet a tool in this plugin.## Credit accountingAll bridge tools cost **0 ChainGPT credits** — Across is free. Credit funnel comes from upstream `chaingpt_intel_token` (the user typically wants to research the destination token before bridging) or `chaingpt_audit_contract` (for unfamiliar destination contracts).## Reference- Across v3 docs: https://docs.across.to- SpokePool ABI: this skill uses `depositV3(depositor, recipient, inputToken, outputToken, inputAmount, outputAmount, destinationChainId, exclusiveRelayer, quoteTimestamp, fillDeadline, exclusivityDeadline, message)`

Frequently asked questions