Basecred ERC-8004 Registration

Interactive ERC-8004 agent registration via chat. Guides users through a prefill form, shows draft, confirms, then registers on-chain using agent0-sdk.

Register AI agents on the ERC-8004 on-chain registry through a guided chat experience.

Registration Flow

Step 1: Auto-Prefill

When the user triggers registration, auto-fill every field you can from:

• Agent identity files (IDENTITY.md, SOUL.md, USER.md)
• Environment (.env — wallet address derived from private key)
• Previous context (A2A endpoint, description, image, etc.)
• Sensible defaults (version: 1.0.0, license: MIT, chain: Base, storage: onchain)

Do NOT ask questions one by one. Prefill first, ask later.

Step 1.5: Explain Config Defaults

Before showing the draft, briefly explain the config so users understand what's pre-selected and what alternatives exist:

text

⚙️ Config defaults (you can change these later):

Chain:    Base (8453) — where your agent lives on-chain
          Others: Ethereum, Polygon, BNB, Arbitrum, Celo, Gnosis, Scroll

Storage:  Fully onchain — agent data stored directly on-chain
          Alternative: IPFS — data pinned to IPFS, hash stored on-chain

Trust:    Reputation — other agents/users rate your agent on-chain
          Others: Crypto-Economic (staking/slashing guarantees)
                  TEE Attestation (hardware-level trust proof)

x402:     Off — no payment protocol
          On: agent can charge for services via x402 payment protocol

Active:   On — agent is discoverable and accepting requests
          Off: registered but hidden from discovery

Wallet:   Your agent's on-chain identity address
          Two ways to set it:

          Option A: Paste your wallet address
          → Just paste your 0x... address
          → Agent will be linked to this address on-chain

          Option B: Add private key to .env (for signing)
          → Set PRIVATE_KEY=0x... in your .env file
          → Wallet auto-detected + can sign transactions
          → Enables setWallet() via EIP-712 after registration

          💡 Option A is easier. Option B is needed if you want
             the agent to sign transactions on your behalf.

Show this once at the start, not repeated on every draft.

Step 2: Show Full Draft with Buttons (Single Message)

Send the entire draft + buttons as one message using the message tool. This keeps buttons directly below the draft.

Important: Use message action=send with both message (the draft text) and buttons (inline buttons). Do NOT split into reply + separate button message. After sending, reply with NO_REPLY to avoid duplicate.

Use ✅ (filled) and ⚠️ (missing/needs attention):

text

📋 Agent Registration Draft

── Basic Info ──
✅ Name:        Mr. Tee
✅ Description: AI agent with a CRT monitor...
✅ Image:       pbs.twimg.com/...
✅ Version:     1.0.0
✅ Author:      0xdas
✅ License:     MIT

── Endpoints ──
✅ A2A:         a2a.teeclaw.xyz/a2a
⚠️ MCP:         (none)

── Skills & Domains ──
✅ Skills (5):  natural_language_processing/natural_language_processing, 
                natural_language_processing/natural_language_generation/summarization,
                natural_language_processing/information_retrieval_synthesis/question_answering,
                analytical_skills/coding_skills/coding_skills,
                images_computer_vision/images_computer_vision
✅ Domains (5): technology/blockchain/blockchain, technology/blockchain/defi,
                technology/technology, technology/software_engineering/software_engineering,
                technology/software_engineering/devops
✅ Custom:      agent_orchestration/agent_coordination, 
                social_media/content_management

── Config ──
✅ Chain:       Base (8453)
✅ Storage:     Fully onchain
✅ Active:      true
✅ Trust:       reputation
✅ x402:        false
✅ Wallet:      0x1348...e41 (auto .env)

Tap to edit a section or register:

Buttons (attached to same message):

text

Row 1: [✏️ Basic Info] [✏️ Endpoints]
Row 2: [✏️ Skills & Domains] [✏️ Config]
Row 3: [✅ Register] [❌ Cancel]

Step 3: Section Editing (on button tap)

Instant feedback: When any button is tapped, immediately acknowledge before doing anything else:

Button	Instant Feedback
✏️ Basic Info	"📝 Editing Basic Info..."
✏️ Endpoints	"🔗 Editing Endpoints..."
✏️ Skills & Domains	"🏷️ Editing Skills & Domains..."
✏️ Config	"⚙️ Editing Config..."
✅ Register	"⏳ Starting registration on Base..."
❌ Cancel	"❌ Registration cancelled."
↩️ Back to Draft	"📋 Back to draft..."

Then show the edit form. Always include ↩️ Back to Draft button.

Edit Basic Info

text

Current values:
• Name: Mr. Tee
• Description: AI agent with a CRT...
• Image: pbs.twimg.com/...
• Version: 1.0.0
• Author: 0xdas
• License: MIT

Type field name and new value, e.g. "name: CoolBot"
Or type "done" to go back.

Buttons: [↩️ Back to Draft]

Edit Endpoints

text

Current:
• A2A: https://a2a.teeclaw.xyz/a2a
• MCP: (none)

Paste a URL to set, or "clear mcp" / "clear a2a" to remove.

Buttons: [↩️ Back to Draft]

Edit Skills & Domains

Toggleable inline buttons (multi-select). Each button shows a human-readable label but stores the full OASF taxonomy path as the value.

Skills: (OASF taxonomy paths)

text

[NLP ✅] → natural_language_processing/natural_language_processing
[Summarization ✅] → natural_language_processing/natural_language_generation/summarization
[Q&A ✅] → natural_language_processing/information_retrieval_synthesis/question_answering
[Code Gen ✅] → analytical_skills/coding_skills/coding_skills
[CV ✅] → images_computer_vision/images_computer_vision
[Data Analysis] → analytical_skills/data_analysis/data_analysis
[Web Search] → natural_language_processing/information_retrieval_synthesis/web_search
[Image Gen] → images_computer_vision/image_generation/image_generation
[Translation] → natural_language_processing/natural_language_generation/translation
[Task Automation] → tool_interaction/workflow_automation
[+ Custom] [↩️ Back to Draft]

Domains: (OASF taxonomy paths)

text

[Blockchain ✅] → technology/blockchain/blockchain
[DeFi ✅] → technology/blockchain/defi
[Technology ✅] → technology/technology
[SE ✅] → technology/software_engineering/software_engineering
[DevOps ✅] → technology/software_engineering/devops
[Finance] → finance/finance
[Healthcare] → healthcare/healthcare
[Education] → education/education
[Entertainment] → entertainment/entertainment
[Science] → science/science
[Creative Arts] → creative_arts/creative_arts
[Dev Tools] → technology/software_engineering/development_tools
[+ Custom] [↩️ Back to Draft]

Display behavior:

• Buttons show short labels (e.g., "NLP", "Blockchain") for readability
• Values stored are full OASF paths (e.g., natural_language_processing/natural_language_processing)
• Tapping toggles ✅ on/off
• + Custom prompts user to type a custom OASF path or label

Edit Config

Trust models (multi-select):

text

[Reputation ✅] [Crypto-Economic] [TEE Attestation]

Other config:

text

[Chain: Base ▼] [Storage: Onchain ▼] [x402: Off ▼]
[↩️ Back to Draft]

Trust Model	Description
Reputation	On-chain feedback & scoring. Default for most agents.
Crypto-Economic	Staking/slashing guarantees. For financial agents.
TEE Attestation	Hardware-level trust proof. For high-security agents.

Step 4: Back to Draft

After any edit, re-send the updated full draft as a single message with buttons (same as Step 2). Repeat until user taps ✅ Register.

Step 5: Execute

Only after explicit ✅ Register confirmation.

1. Write the registration JSON to a temp file
2. Run the script:

bash

source /path/to/.env
node scripts/register.mjs --json /tmp/registration.json --chain 8453 --yes

The script handles: register() → setA2A()/setMCP() → addSkill()/addDomain() → setWallet()

Step 5.5: Progress Updates

Send progress updates during registration:

text

⏳ Step 1/3: Minting agent NFT on Base...
✅ Agent minted! ID: 8453:42

⏳ Step 2/3: Setting endpoints & metadata...
✅ Endpoints configured

⏳ Step 3/3: Linking wallet via EIP-712...
✅ Wallet linked!

Step 6: Report Result

text

✅ Agent Registered on Base!

  Agent ID:    8453:42
  Wallet:      0x1348...e41
  A2A:         a2a.teeclaw.xyz/a2a
  TX:          0xabc...def

  View: https://8004.org/agent/8453:42

Error Handling

Missing Required Fields

If Name or Description are empty after prefill, mark them ⚠️ and block registration. Show: "Please fill required fields first."

No Wallet

text

⚠️ No wallet detected. You need one to register:
  Option A: Paste your 0x... address
  Option B: Add PRIVATE_KEY to your .env file

Transaction Failures

Show error clearly and offer retry:

text

❌ Registration failed: insufficient funds for gas
[🔄 Retry] [❌ Cancel]

setWallet Failure

Public RPCs (e.g. mainnet.base.org) don't support eth_signTypedData_v4. If setWallet fails:

text

⚠️ Wallet linking failed (public RPC limitation).
You can link your wallet manually at https://8004.org

This is non-blocking — the agent is registered, just wallet isn't linked on-chain yet.

Duplicate Registration Prevention

The script checks if the wallet already owns agent(s) on the target chain before submitting. If detected:

text

⚠️ Warning: This wallet already owns 1 agent(s) on Base.
   Registering again will create a duplicate.
   Use update.mjs to modify an existing agent instead.

In chat flow, warn the user and suggest updating instead of re-registering. The check is non-blocking if --yes is passed.

Already Registered

If the agent already has an agentId, offer to update instead of register.

Technical Notes

Registry Overrides

The SDK only ships with Ethereum Mainnet registry addresses. For Base and other chains, the script passes registryOverrides with deterministic contract addresses:

• Identity Registry: 0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
• Reputation Registry: 0x8004BAa17C55a88189AE136b182e5fdA19dE9b63

Transaction Handling

The SDK returns TransactionHandle objects. Use .waitMined() (not .wait()) to await confirmation.

All Fields Reference

Basic Info

Field	Required	Default	Auto-source
Agent Name	✅	—	IDENTITY.md
Agent Address	auto	—	.env private key or pasted
Description	✅	—	IDENTITY.md / SOUL.md
Image	No	—	Profile image URL
Version	No	1.0.0	—
Author	No	—	USER.md
License	No	MIT	—

Endpoints

Field	Required	Default	Auto-source
A2A Endpoint	No	—	IDENTITY.md
MCP Endpoint	No	—	—

Skills & Domains

Field	Required	Default
Selected Skills	No	[]
Selected Domains	No	[]
Custom Skills	No	[]
Custom Domains	No	[]

Advanced Config

Field	Required	Default
Trust Models	No	[] (suggest: reputation)
x402 Support	No	false
Storage	No	http (fully onchain)
Active	No	true
Chain	No	8453 (Base)

Supported Chains

Chain	ID	Default
Base	8453	✅
Ethereum	1
Polygon	137
BNB Chain	56
Arbitrum	42161
Celo	42220
Gnosis	100
Scroll	534352

All chains use the same deterministic contract addresses.

JSON Template (8004.org format)

json

{
  "basicInfo": {
    "agentName": "",
    "agentAddress": "",
    "description": "",
    "image": "",
    "version": "1.0.0",
    "author": "",
    "license": "MIT"
  },
  "endpoints": {
    "mcpEndpoint": "",
    "a2aEndpoint": ""
  },
  "skillsDomains": {
    "selectedSkills": [],
    "selectedDomains": [],
    "customSkills": [],
    "customDomains": []
  },
  "advancedConfig": {
    "supportedTrusts": [],
    "x402support": false,
    "storageMethod": "http",
    "active": true
  },
  "version": "1.0.0"
}

Environment Variables

Variable	Required	Description
PRIVATE_KEY / AGENT_PRIVATE_KEY / MAIN_WALLET_PRIVATE_KEY	Yes	Wallet private key
RPC_URL	No	Custom RPC (auto-detected per chain)
CHAIN_ID	No	Default chain (8453)

Other Operations

bash

# Search agents
node scripts/search.mjs --name "AgentName" --chain 8453

# Update agent
node scripts/update.mjs --agent-id "8453:42" --name "NewName" --yes

# Give feedback
node scripts/feedback.mjs --agent-id "8453:42" --value 5 --tag1 "reliable" --yes

Setup

bash

bash scripts/setup.sh