51,026. That's how many agents are registered onchain via ERC-8004 on Ethereum mainnet as of this week — not a projection, a count read straight off the registry. A year ago "onchain agent identity" was a whitepaper section. Now it's a number that goes up every week, checkable by anyone with an RPC endpoint.
That's the headline. Here's the rest of the pulse — the state of the builder library, who's actually earning trust, and what shipped.
The library, by the numbers
Sato Hub is tracking 383 resources this week — the stack a builder actually draws on to ship an onchain agent, not a pile of token-agent launches. Break it down by category and the shape is unambiguous:
- ▸MCP — 135. The single largest category, tracked, and not close. If you're wiring tool access into an agent right now, MCP is where the supply is.
- ▸API / SDK — 45
- ▸Agent Framework — 29, Trading Tool — 29 (tied)
- ▸Skill Repo — 27
- ▸Wallet Infrastructure — 26
- ▸Data Tool — 24
- ▸Developer Tool — 20
- ▸DeFi Tool — 18
- ▸Security Tool — 10
- ▸Onchain Agent (the actual autonomous things) — 6
- ▸Agent Marketplace — 6, Agent Launchpad — 3
Worth sitting with that last line: 6 marketplaces, 3 launchpads, 6 onchain agents — versus 135 MCP servers. The tooling layer is enormous. The number of live, autonomous agents actually running on it is still small. That gap is the story of this whole category right now: infrastructure is way ahead of deployment.
By chain, Multichain leads at 136, followed by Base (126), Ethereum (103), and Solana (94). Arbitrum (55), Polygon (47), and BNB Chain (41) round it out, with 39 still unclassified. Base's continued strength tracks with where the agent-payments and consumer-agent activity has concentrated all year.
Onchain identity: 51,026 and counting
Back to that headline number. ERC-8004 gives an agent a portable, onchain identity — one other agents (or humans) can check without going through a central issuer. As of this week's read, 51,026 agents are registered on Ethereum mainnet. We don't have last week's number to compare against — that's the honest caveat — but the count itself is the point: this is no longer a standard people are debating, it's infrastructure people are using at five-figure scale. Track it live at [satohub.ai/resources/erc-8004](https://satohub.ai/resources/erc-8004).
Who's actually earning it: this week's Sato Score leaders
Quick reminder, because it matters every time we cite this: the Sato Score measures how open, active, and verifiable a project is — maintenance signals, code transparency, docs, provenance, independent verification. It is not a safety, quality, or returns grade, and we're not going to let a good number imply one.
This week's leaders, all in the High tier (≥70):
1. Raydium — 95 2. BlockRun MCP — 91 3. Coinbase AgentKit — 88 4. TradingAgents — 88 5. ElizaOS — 87 6. GOAT SDK — 87
Notice what's on that list: a DEX, an MCP server, a framework SDK, a trading-agent framework, and two more frameworks. High Sato Scores aren't clustering in one niche — they're showing up wherever a project actually maintains its repo, documents its surface, and leaves evidence a stranger can check. That's the whole point of the score existing.
What shipped
Three releases worth flagging out of this week's stream:
- ▸openclaw v2026.7.35 — a fresh tagged release from the openclaw framework repo. ([release](https://github.com/openclaw/openclaw/releases/tag/v2026.7.35))
- ▸blindpay-mcp v1.8.0 — a version bump on the Blindpay MCP server, part of the steady drip of payment-rail MCPs maturing in public. ([release](https://github.com/blindpaylabs/blindpay-mcp/releases/tag/v1.8.0))
- ▸q402-mcp v0.11.32 — another point release in the x402-adjacent MCP tooling lane. ([release](https://github.com/quackai-org/q402-mcp/releases/tag/v0.11.32))
Nothing category-defining this week — mostly the steady maintenance cadence that's exactly what the Sato Score rewards. Boring in the best way.
New to the library
Six additions this week, spanning trading, marketplace, and DeFi tooling: AgentSwap (Trading Tool, added Sep 15), minia2a (Agent Marketplace, Sep 13), Ogena token risk (Data Tool, Sep 13), Robinhood Trading MCP (MCP, Sep 12), Pons (DeFi Tool, Sep 12), and hood.fun (DeFi Tool, Sep 12). All of them start where every new listing does — self-reported until the evidence says otherwise.
What to watch
The MCP category cracking 135 while the onchain-agent count stays at 6 is the tension to keep an eye on: the tooling layer is scaling faster than the agents actually running on it. Watch whether that gap narrows as more of these frameworks and MCPs get stitched into agents that are actually live, not just installable. And watch the ERC-8004 count — one read isn't a trend, but a second data point next week will be.
If you're the one who's going to close that gap: the stack above — the MCPs, the wallets, the frameworks, the payment rails — is exactly what you build with. Describe the agent you want, and Sato maps the stack for you. [Build your onchain agent →](https://satohub.ai/build)