across-bridge SKILL.md skillA
across-bridge from starchild-ai-agent/official-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add starchild-ai-agent/official-skills/across-bridge@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- starchild-ai-agent/official-skills
- Path
across-bridge/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Jun 27, 2026
- Size
- 5,777 bytes
- Repository stars
- 32
- License
- none declared
Bridge ETH and ERC-20 tokens across EVM chains via Across Protocol v3. One function for a quote, one function for the entire end-to-end bridge (approval + deposit + arrival verification). Use when the user wants to move tokens between chains (e.g. "bridge 50 USDC from Base to Arbitrum", "send ETH from Ethereum to Optimism", "move USDT Arbitrum → Base"). Supports Ethereum, Arbitrum, Optimism, Base, Polygon, BSC, Linea, zkSync, Scroll, Mantle. Fast settlement (seconds to minutes).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 🌉 Across Bridge
Bridge tokens between EVM chains using [Across Protocol](https://across.to) v3.
Across is an intent-based bridge: relayers front the liquidity on the
destination chain and get repaid on the origin chain, so settlement is fast
(seconds to a few minutes) and fees are low (0.05–0.5%).
## When to Use
- **Cross-chain token transfer**: "bridge 50 USDC from Base to Arbitrum"
- **L1 ↔ L2 movement**: "send 0.01 ETH from Ethereum to Optimism"
- **Stablecoin hops**: "move USDT from Arbitrum to Base"
- **Speed matters**: Across fills in seconds–minutes vs native bridges (7 days)
## Supported Chains
Ethereum · Arbitrum · Optimism · Base · Polygon · BSC · Linea · zkSync · Scroll · Mantle
## Supported Tokens
ETH · WETH · USDC · USDT · WBTC · DAI
## How to Call
All operations are Python functions exposed under `core.skill_tools`. Because
the skill name contains a hyphen, use the `_modules` dict to access it:
```bash
python3 - <<'EOF'
from core.skill_tools import _modules
across = _modules["across-bridge"]
import json
q = across.bridge_quote(from_chain="base", to_chain="arbitrum",
token="USDC", amount=1, wallet="0x...")
…Read the whole file at its exact version.
How to install
mdr add starchild-ai-agent/official-skills/across-bridge@sha256:366ec0f7598bf200The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_gjye6sgzk5poiz7m)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jun 27, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5777 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
starchild-ai-agent/official-skills · 32 stars · license none declared · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_gjye6sgzk5poiz7m GET https://markdownregistry.com/api/v1/resolve?ref=starchild-ai-agent/official-skills/across-bridge GET https://markdownregistry.com/api/v1/blob/366ec0f7598bf2005d541e45aab06117f83c283a08fdec685688a7abb69223ef
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.