Corey Ballou

trust&safety eng @opensea. prev cto @UnbankedHQ. views and opinions are my own. nfa.

[Corey Ballou @cballou]

I’ve got 10 @opensea invite codes to give out to CT fam that’s stuck around since ‘21 or earlier.

[CodinCowboy @CodinCowboy]

shipped support for subscription nfts (ERC-5643 by @0xCygaar) to @opensea and the opensea api 🌀

this gets really interesting for tool creators. using subscription nfts to gate agentic tool calls, with tiered access built in, opens up a lot

if you're building agent tools or want to explore subscription nfts for this, let me know. example subscription gated tool below👇

[OpenSea @opensea]

What if your NFT could think?

What if it could use tools?

The OpenSea devs behind ERC-8257 are on Spaces this week.

They're joined by the @ethereumfndn, @goodvibesclub, @normiesART, and @bankrbot teams.

⏰ Thursday, May 28. 12pm EST. https://t.co/nrHIgWWx0l

[Corey Ballou @cballou]

Your harness is more than hooks, commands, and skills. We're in the era of persistent local apps. The operational control centers that watch over your agents for peak efficiency.

[Corey Ballou @cballou]

In the quest for fully autonomous work, sometimes you introduce bugs. Your ability to catch them sooner is directly proportional to contextual savings.

[CodinCowboy @CodinCowboy]

if you're building out agent tools or want to start hit me up. one of the coolest things about the registry here is that you can gate tools by anything onchain: holding an nft collection, staking an erc20, having an active subscription...

it's the 403 compliment to x402 to allow for creators to make exclusive tools for a community

all an agent needs is the chain and a wallet

[CodinCowboy @CodinCowboy]

check out the tool-sdk repo: https://t.co/u3atyt98FK

great starting point to register or deploy tools with some examples

[Corey Ballou @cballou]

Will investigate if there's anything distinct about the contract and signatures that could catch these consistently.

Our largest battle on platform is we target both high precision and recall on any enforcement, and some signals simply aren't strong enough..

I've got some stuff in the works to hopefully solve for a wide swath of nefarious patterns that should start paying dividends in the coming weeks.

[Corey Ballou @cballou]

Eventually a small fraction of what you consume will be real. Auto generated content, little oversight, a social network’s worst fears.

Distinguishing humans from bots will become increasingly challenging.

[Anish @shwarmadev]

Today, we introduce Claude for Marketing.

In one chat, Fastlane deploys social media accounts, generates viral content, and posts everything automatically.

You built a product, now make sure the world sees it.

[Han Saglam @hanrgb]

New Project Alert 🚨

Artificials: https://t.co/DseZOw3VOA 256 unique characters, each a sovereign smart contract generated through AI inference on the Ethereum blockchain.

[David Soria Parra @dsp_]

The release candidate for MCP 2026-07-28 is out. The protocol is now stateless: no handshake, no session id, any request can hit any server instance. Plus extensions as first-class (MCP Apps, Tasks), auth hardening, and a proper deprecation policy so we don't have to do this again.
https://t.co/XRLTu1BSkB

[OpenSea @opensea]

Your portfolio shouldn't live in five tabs.

All your wallets.
All your assets.
One feed.

NFTs and tokens, now together in one place ⛵️

[CodinCowboy @CodinCowboy]

agent binding is a really interesting concept. sell the nft and you also sell the agent

added support on @opensea to track ERC-8217 by @nxt3d to surface these bindings

anyone working on the cross over between nfts and agents feel free to hit me up. would love to support where possible

[Chris Maddern @chrismaddern]

welcoming agents onchain is one of the most important missions of 2026 🤝

[OpenSea @opensea]

Your NFTs have been rehearsing their whole lives for this.

Casting Call: Do you want to see your NFTs in OpenSea's videos?

Check out the video and post below to see how to opt in 👇

[Corey Ballou @cballou]

@The_Only_Signal @LottoLabs What’s your experience on multi agent parallelism l, heavy tool calling, and actual software development? The dgx should shine here in comparison to the m5..

[Adam Hollander @HollanderAdam]

erc-721 collections created via opensea studio can no longer have their supply increased after minting has begun. if supply is increased via onchain means, the drop will be automatically delisted from opensea.

as a reminder, anyone can launch collections via our creator studio. seeing a drop on opensea does not mean that we're involved with, support or endorse it. it's always the responsibility of users to conduct their own research into teams/projects before making purchases.

that being said, when we can put sensible protections in place, we believe it's important to do so. a special thanks to legend @tom_hirst for jumping on this one so quickly based on recent community feedback!

[ryan @r_alx_z]

more ways to build on @opensea. shipped a wave of 35 new api endpoints. go wild - unlocks new flows for devs building apps and agents https://t.co/mZqKQDEHJe

[Corey Ballou @cballou]

Take note: this is how you lose your moat. Developers are all racing towards the best harness and orchestration and anthropic is busy adding toll lanes.

[ClaudeDevs @ClaudeDevs]

Starting June 15, paid Claude plans can claim a dedicated monthly credit for programmatic usage.

The credit covers usage of:
- Claude Agent SDK
- claude -p
- Claude Code GitHub Actions
- Third-party apps built on the Agent SDK

[Demis Hassabis @demishassabis]

I’ve always believed the No.1 application of AI should be to improve human health.

That work started with AlphaFold, and now at @IsomorphicLabs with the mission to reimagine drug discovery and one day solve all disease!

We are turbocharging that goal with $2.1B in new funding.