Ethereum mainnet's ERC-8004 identity registry added 333 agents this week, landing at 50,415 registered agents as of the 2026-08-24 check. That's the number worth leading with — it's onchain, independently checkable, and moving. Underneath it, the SatoHub library — the mapped stack builders actually pull from — sat exactly where it sat last week and the week before: 369 tracked resources, no new adds since mid-July. Here's the state of the onchain agent economy for 2026-W35, straight from our own tracked data.
The library, by the numbers
369 resources tracked, flat for a third consecutive week. The category mix hasn't moved either:
- ▸MCP — 134 (36% of the library)
- ▸API / SDK — 45
- ▸Agent Framework — 29
- ▸Skill Repo — 27
- ▸Trading Tool — 27
- ▸Wallet Infrastructure — 25
- ▸Data Tool — 22
- ▸Developer Tool — 20
- ▸DeFi Tool — 14
- ▸Security Tool — 10
- ▸Onchain Agent — 6
- ▸Agent Launchpad — 3
- ▸Agent Marketplace — 3
- ▸Research Tool — 2
- ▸Research Paper — 1
- ▸Other — 1
MCP still outnumbers the next two categories combined, and still the default way an agent reaches a wallet, a DEX, or a price feed instead of a bespoke integration. Only 6 resources carry the Onchain Agent tag itself — the deployed thing, not a tool that builds one — with launchpads and marketplaces stuck at 3 apiece. That's the builder-before-marketplace shape of the library, not a gap we're waiting to fill by accident.
The newest adds on record are still Ultrade MCP, PaladinFi Swap MCP, Kirha Crypto, MetaMask mcp-x402, Metaplex Agent Kit, and Squads MCP — all logged 2026-07-19. Three flat weeks in a row on the total count is now a pattern, not a blip: either the library's growth has genuinely plateaued or the next batch of submissions is sitting in review. Either way, it's a data point worth naming rather than smoothing over.
Where it's built
By chain, also unchanged this week:
- ▸Multichain — 136
- ▸Base — 120
- ▸Ethereum — 100
- ▸Solana — 92
- ▸Arbitrum — 53
- ▸Polygon — 46
- ▸Unknown — 39
- ▸BNB Chain — 36
(Resources can span more than one chain, so these overlap.) Base and Ethereum still lead single-chain tooling, Solana close behind — the same concentration we've been tracking for weeks.
Onchain identity keeps climbing
ERC-8004's Identity Registry on Ethereum mainnet counted 50,415 registered agents at our 2026-08-24 check, up 333 from last week's 50,082. It's a registration count, not an activity count — minting an identity is cheap, running an agent that does something checkable is the harder number, and still the one that matters more. But it's a real, onchain figure anyone can verify themselves, which is more than most agent-economy stats can say. Full breakdown: [satohub.ai/resources/erc-8004](https://satohub.ai/resources/erc-8004).
Sato Score leaders this week
Quick reminder: the Sato Score measures how open, active, and verifiable a listing is — maintenance, code transparency, docs, provenance, independent verification. It is not a safety, quality, or returns grade. This week's High-tier leaders:
- ▸Raydium — 95
- ▸Coinbase AgentKit — 88
- ▸Trust Wallet Agent Kit (TWAK) — 86
- ▸0xGasless AgentKit — 86
- ▸BlockRun MCP — 86
- ▸ElizaOS — 84
One seat turned over from last week: ElizaOS enters the top six at 84, evidence of an actively maintained, publicly auditable framework. All six sit in the High tier (≥70) — open code and activity a builder can check for themselves, not a badge somebody paid for.
Shipped this week
- ▸[crypto-quant-signal-mcp v1.28.1](https://github.com/AlgoVaultLabs/crypto-quant-signal-mcp/releases/tag/v1.28.1) shipped from AlgoVaultLabs.
- ▸[eliza](https://github.com/elizaOS/eliza/releases/tag/nubs%2Frelease-integration-9444-browser-escalation-clean-20260823) pushed a browser-escalation cleanup, plus a [UI-hygiene integration](https://github.com/elizaOS/eliza/releases/tag/nubs%2Frelease-integration-ui-hygiene-20260823) — two releases in one week from one of the most-forked agent frameworks in the space.
- ▸[Codex 0.149.1](https://github.com/openai/codex/releases/tag/rust-v0.149.1) shipped, another harness builders reach for to write the agents above.
- ▸[opensea-skill v2.20.0](https://github.com/ProjectOpenSea/opensea-skill/releases/tag/v2.20.0) landed.
On the news side, CoinDesk [reported](https://www.coindesk.com/business/2026/08/23/crypto-s-next-billion-users-might-be-ai-agents-and-they-re-paying-with-stablecoins) on the framing that crypto's next wave of users could be AI agents transacting in stablecoins — a claim about direction, not a measured number, but it's the same thesis this library exists to make checkable: if an agent is going to pay for something, it needs a wallet, a payment rail, and a way for the other side to trust it. That's the stack, not the pitch.
What to watch
Watch whether three flat weeks at 369 turns into a fourth — a genuine plateau would be worth flagging on its own, since the last real growth spurt was concentrated almost entirely in MCP and wallet infrastructure back in mid-July. And keep watching the gap between ERC-8004's registration count and how many of those 50,415 identities are attached to agents doing anything a directory could actually verify. Registering is cheap; showing your work is the number that will matter.
Build yours
This is the map. If you're building an onchain agent — a trading bot, a payments agent, a data-fetching skill — the stack above is what it's built from: MCPs, wallets, frameworks, chains, all tracked with evidence, not vibes. Describe what you want to build and Sato maps the stack: [satohub.ai/build](https://satohub.ai/build).