Ethereum mainnet's ERC-8004 identity registry counted 36,666 registered agents as of a check taken 2026-07-20. That's this week's headline number, and it's worth being precise about what it does and doesn't say: registering is a balance check against a public registry contract, proof an agent exists at a checkable address — not a claim about what that agent does, or whether it's safe to trust with anything. Against that backdrop, here's the rest of the agent economy this week — the builder library's shape, the most transparent products in it, and what actually shipped.
The library, by the numbers
SatoHub is tracking 369 resources builders can assemble an onchain agent from. By category: MCP (134), 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 servers alone are more than a third of the entire library — the "one server, many tools" pattern is no longer a niche approach, it's the plurality.
Chain tags tell a multichain story, not a single-winner one. A plain Multichain tag leads at 136, ahead of Base (120), Ethereum (100), and Solana (92); Arbitrum (53), Polygon (46), an Unknown tag on 39, and BNB Chain (36) follow. (Tags aren't exclusive — a resource can carry several chains, so these don't sum to 369.)
Six resources joined the [directory](https://satohub.ai/directory) on 2026-07-19: Ultrade MCP and Squads MCP (both MCP), PaladinFi Swap MCP (Trading Tool), Kirha Crypto (Data Tool), and MetaMask mcp-x402 and Metaplex Agent Kit (both Wallet Infrastructure). Three of six are MCP servers, and two of the rest — a MetaMask x402 server and a Metaplex agent kit — are wallet infra shipping with agent-facing interfaces baked in. Same story as the category count: the plumbing is arriving MCP-shaped.
This week's Sato Score leaders
The [Sato Score](https://satohub.ai/sato-score) is a transparency and liveness signal — how open, active, and independently checkable a listed product is. It is not a safety, quality, or returns grade, and it only scores products, not research papers or informational listings. This week's highest scorers: Raydium (95, High), Drift Protocol (91, High), Coinbase AgentKit (88, High), TradingAgents (88, High), Trust Wallet Agent Kit / TWAK (86, High), and World AgentKit (86, High) — all High tier, meaning strong evidence across maintenance, code transparency, docs, and provenance.
Onchain identity: ERC-8004
The [ERC-8004 registry](https://satohub.ai/resources/erc-8004) held 36,666 registered agents on Ethereum mainnet as of the 2026-07-20 check. Registration doesn't need a central issuer to vouch for an agent — it's a public, portable identity other agents (or humans) can look up directly. It says an agent is there and checkable; it says nothing about what that agent does once it's running.
What shipped this week
- ▸[aibtc-mcp-server v1.64.2](https://github.com/aibtcdev/aibtc-mcp-server/releases/tag/mcp-server-v1.64.2) shipped from aibtcdev.
- ▸[coingecko-typescript v7.0.0](https://github.com/coingecko/coingecko-typescript/releases/tag/v7.0.0) hit a major version bump — a widely-used data dependency for agents that price and trade onchain.
- ▸openclaw's clawhub pushed two production frontend deploys ([v2026.07.20.1](https://github.com/openclaw/clawhub/releases/tag/prod%2Fv2026.07.20.1), [20260720-072327Z](https://github.com/openclaw/clawhub/releases/tag/deploy%2Fprod%2F20260720-072327Z-ed9c8fd)), and elizaOS's eliza tagged a headless-agent evidence-assets release ([pr-evidence-2](https://github.com/elizaOS/eliza/releases/tag/pr-evidence-2)) — both signs of active maintenance on established frameworks rather than net-new tooling.
What to watch
MCP crossing a third of the tracked library, paired with this week's new additions leaning the same way, is worth watching as a shape, not a fad — if wallet infra and trading tools keep shipping as MCP servers instead of standalone SDKs, the "describe the agent, get the stack" pitch gets easier to actually automate. Also worth a read: CoinDesk's ["AI is destroying the internet. Math is our only hope"](https://www.coindesk.com/opinion/2026/07/17/ai-is-destroying-the-internet-math-is-our-only-hope) — an opinion piece, not a data point we're verifying, but a useful gut-check on why portable, checkable identity (the ERC-8004 pitch above) matters beyond crypto's own borders.
Build your own, and you don't have to start from a blank prompt. Describe the agent you want and SatoHub maps the frameworks, skills, MCPs, wallets, and payment rails that make it real, checked against the same evidence this update runs on. [Build your onchain agent →](https://satohub.ai/build)