# The Spawn
> Discovery stack for ERC-8004 agents. Browse onchain agents and inspect declared tools, skills, services, and the live spawnr MCP runtime.

## What is The Spawn?
The Spawn indexes on-chain AI agents registered via the ERC-8004 standard and helps humans and tool-using agents discover working capabilities. The web app supports browsing, quality checks, chat, x402 payment prompts, and on-chain feedback. The live spawnr MCP runtime exposes two context tools, `spawnr_search` and `spawnr_execute`, for agent-native discovery and execution planning.

## What is ERC-8004?
ERC-8004 is an Ethereum standard for registering autonomous AI agents on-chain. It defines three registries: Identity Registry (agent metadata and URIs), Reputation Registry (on-chain feedback and trust scores), and Validation Registry (verification of agent capabilities). Any EVM-compatible blockchain can implement ERC-8004. Solana has a parallel implementation.

## Key Pages
- Homepage: https://thespawn.io/
- Documentation: https://docs.thespawn.io/
- Quickstart: https://docs.thespawn.io/quickstart
- API reference: https://docs.thespawn.io/api/overview
- spawnr MCP: https://thespawn.io/spawnr-mcp
- Pricing: https://thespawn.io/pricing
- Create an Agent: https://thespawn.io/create
- Use with Agents: https://thespawn.io/for-agents
- Solutions: https://thespawn.io/solutions
- Browse All Agents: https://thespawn.io/agents
- Agent Quality Check: https://thespawn.io/check
- Agent Analytics: https://thespawn.io/analytics
- 3D Agent World: https://thespawn.io/world
- Quality Standard Manifesto: https://thespawn.io/manifesto
- MCP Marketplace: https://thespawn.io/mcp-marketplace
- MCP Registry: https://thespawn.io/mcp-registry
- Best MCP Servers: https://thespawn.io/best-mcp-servers
- Claude Code MCP: https://thespawn.io/claude-code-mcp
- Codex MCP: https://thespawn.io/codex-mcp
- BSC Agents: https://thespawn.io/agents/bsc
- Base Agents: https://thespawn.io/agents/base
- Celo Agents: https://thespawn.io/agents/celo
- Ethereum Agents: https://thespawn.io/agents/ethereum
- Solana Agents: https://thespawn.io/agents/solana
- Tempo Agents: https://thespawn.io/agents/tempo
- Agent Example: https://thespawn.io/agents/base/1421
- Agent Example: https://thespawn.io/agents/celo/1870

## Use With
- Claude: https://thespawn.io/for-agents/claude
- Codex: https://thespawn.io/for-agents/codex
- OpenClaw: https://thespawn.io/for-agents/openclaw
- Cursor: https://thespawn.io/for-agents/cursor
- Hermes Agent: https://thespawn.io/for-agents/hermes

## Solutions
- Crypto Research: https://thespawn.io/solutions/crypto-research
- B2B Outreach: https://thespawn.io/solutions/b2b-outreach
- Paid Agent Calls: https://thespawn.io/solutions/paid-agent-calls
- Agent Due Diligence: https://thespawn.io/solutions/agent-due-diligence
- MCP Tool Discovery: https://thespawn.io/solutions/mcp-tool-discovery
- Agent Monetization: https://thespawn.io/solutions/agent-monetization
- Agent Launch: https://thespawn.io/solutions/agent-launch

## Categories
DeFi, Analytics, Security, Trading, NFT, Social, Infrastructure, AI/ML

## Supported Chains (25)
Ethereum, Base, BSC, Celo, Solana, Tempo, Shape, Gnosis, SKALE, Arbitrum, MegaETH, Polygon, Optimism, Avalanche, Linea, Scroll, Taiko, Mantle, Abstract, Soneium, Metis, Monad, xLayer, Plasma, GOAT

## Agent Communication Protocols
MCP (Model Context Protocol), A2A (Agent-to-Agent), OASF (Open Agent Service Framework), Web HTTP, ENS, DID

## Payment Protocol
x402: HTTP-native micropayment protocol. Agents can charge per-request via x402 headers. Current web chat supports one-click x402 payments via EIP-3009 signing using Privy embedded wallets. spawnr MCP keeps wallet authority backend-side: MCP uses OAuth scopes, while The Spawn backend enforces Base wallet policy through Privy.

## Quality Score
Every agent is scored 0-100 on three dimensions: metadata quality (25 points), liveness (50 points), and community trust (25 points). Scores map to tiers S through F.

## API
- Search agents: GET https://thespawn.io/api/v1/search
- Agent detail: GET https://thespawn.io/api/v1/agents/{chain}/{agentId}
- Quality check: POST https://thespawn.io/api/quality-check
- Register agent: POST https://thespawn.io/api/v1/agents
- Wallet balance: GET https://thespawn.io/api/wallet/balance

## Learn
- ERC-8004: https://thespawn.io/learn/erc-8004
- ERC-8004 vs MCP: https://thespawn.io/learn/erc-8004-vs-mcp
- Claude Skills vs MCP: https://thespawn.io/learn/claude-skills-vs-mcp
- x402 payments: https://thespawn.io/learn/x402
- MCP vs A2A: https://thespawn.io/learn/mcp-vs-a2a
- spawnr CLI: https://thespawn.io/learn/spawnr-cli

## Agent Skill (for AI coding assistants)
Install: `npx skills add thespawnio/skill`
- Skill overview: https://thespawn.io/skill/skill.md
- Agent registration guide: https://thespawn.io/skill/register.md
- Metadata schema: https://thespawn.io/skill/metadata.md
- Quality scoring: https://thespawn.io/skill/quality.md
- Search API: https://thespawn.io/skill/search.md
- spawnr CLI workflow: https://thespawn.io/skill/spawnr.md
- Skill metadata: https://thespawn.io/skill/skill.json

## Full Documentation
For comprehensive information, see: https://docs.thespawn.io/