How do I install the Ercdata skill?

Run npx skillmds@latest add modbender/ercdata in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Ercdata safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: executes scripts, makes network calls, reads secrets. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Ercdata?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Ercdata free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Ercdata?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Ercdata by modbender — Agent Skill

Name: Ercdata
Rating: 4.5 (4 reviews)
Author: modbender

Ercdata

Store, verify, and manage AI data on the Ethereum blockchain (Base network) using the ERCData standard. Use when an agent needs to store data fingerprints on-chain, verify data integrity, create audit trails, manage access control for private data, or interact with the ERCData smart contract. Supports public and private storage, EIP-712 verification, snapshots, and batch operations.

modbender Updated Sep 9, 2026 12 repo stars

File contents

ERCData

Store and verify AI-related data on Base mainnet. Public or private, with cryptographic integrity proofs.

Quick Start

# Store public data
uv run {baseDir}/scripts/ercdata-cli.py store \
  --type AI_AGENT_MEMORY \
  --data "memory hash: abc123" \
  --metadata '{"agent":"MyBot","ts":"2026-01-31"}' \
  --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT

# Store private data (only you + granted addresses can read)
uv run {baseDir}/scripts/ercdata-cli.py store \
  --type AI_AGENT_MEMORY \
  --data "secret memory data" \
  --private \
  --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT

# Read entry
uv run {baseDir}/scripts/ercdata-cli.py read --id 1 --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT

# Verify entry (EIP-712 signature check)
uv run {baseDir}/scripts/ercdata-cli.py verify --id 1 --method eip712 --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT

# Grant access to private entry
uv run {baseDir}/scripts/ercdata-cli.py grant-access --id 2 --to 0xSomeAddress --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT

Configuration

Set via environment or skill config:

ERCDATA_KEY — Private key for signing transactions (required for writes)
ERCDATA_CONTRACT — Contract address on Base mainnet
ERCDATA_RPC — RPC URL (default: https://mainnet.base.org)

Or pass via --key, --contract, --rpc flags.

Commands

Command	What it does
`store`	Store data on-chain (add `--private` for access control)
`read`	Read a data entry by ID
`verify`	Verify data integrity (eip712 or hash method)
`grant-access`	Grant read access to an address (private entries)
`revoke-access`	Revoke read access
`register-type`	Register a new data type (admin only)
`snapshot`	Create a point-in-time snapshot
`info`	Get entry info without full data

Privacy Model

Public (default): Anyone can read via getData(). Use for transparency, audit trails.
Private (--private): Only the provider, granted addresses, and admin can read. Use for sensitive agent data.

Private entries store the same data on-chain but gate getData() access. Note: raw transaction calldata is still visible on-chain explorers. For maximum privacy, encrypt data before storing.

Use Cases for AI Agents

Memory attestation — Hash your MEMORY.md and store it periodically for tamper-proof audit trail
Agent identity — Store model fingerprint, system prompt hash, config on-chain
Verifiable outputs — Hash agent outputs and store for later verification
Agent-to-agent trust — Check another agent's ERCData entries before trusting its data
Model provenance — Store model hashes, benchmark scores, architecture metadata

API Reference

See references/api.md for full contract API, roles, events, and limits.

Requirements

Python 3.10+ with web3 and eth-account packages (auto-installed by uv)
A funded wallet on Base mainnet (ETH for gas)
PROVIDER_ROLE granted by contract admin for storing data
VERIFIER_ROLE granted for verification operations

---name: ercdatadescription: Store, verify, and manage AI data on the Ethereum blockchain (Base network) using the ERCData standard. Use when an agent needs to store data fingerprints on-chain, verify data integrity, create audit trails, manage access control for private data, or interact with the ERCData smart contract. Supports public and private storage, EIP-712 verification, snapshots, and batch operations.--- # ERCData Store and verify AI-related data on Base mainnet. Public or private, with cryptographic integrity proofs. ## Quick Start ```bash # Store public data uv run {baseDir}/scripts/ercdata-cli.py store \ --type AI_AGENT_MEMORY \ --data "memory hash: abc123" \ --metadata '{"agent":"MyBot","ts":"2026-01-31"}' \ --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT # Store private data (only you + granted addresses can read) uv run {baseDir}/scripts/ercdata-cli.py store \ --type AI_AGENT_MEMORY \ --data "secret memory data" \ --private \ --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT # Read entry uv run {baseDir}/scripts/ercdata-cli.py read --id 1 --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT # Verify entry (EIP-712 signature check) uv run {baseDir}/scripts/ercdata-cli.py verify --id 1 --method eip712 --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT # Grant access to private entry uv run {baseDir}/scripts/ercdata-cli.py grant-access --id 2 --to 0xSomeAddress --key $ERCDATA_KEY --contract $ERCDATA_CONTRACT ``` ## Configuration Set via environment or skill config: - `ERCDATA_KEY` — Private key for signing transactions (required for writes) - `ERCDATA_CONTRACT` — Contract address on Base mainnet - `ERCDATA_RPC` — RPC URL (default: https://mainnet.base.org) Or pass via `--key`, `--contract`, `--rpc` flags. ## Commands | Command | What it does | |---------|-------------| | `store` | Store data on-chain (add `--private` for access control) | | `read` | Read a data entry by ID | | `verify` | Verify data integrity (eip712 or hash method) | | `grant-access` | Grant read access to an address (private entries) | | `revoke-access` | Revoke read access | | `register-type` | Register a new data type (admin only) | | `snapshot` | Create a point-in-time snapshot | | `info` | Get entry info without full data | ## Privacy Model - **Public (default):** Anyone can read via `getData()`. Use for transparency, audit trails. - **Private (`--private`):** Only the provider, granted addresses, and admin can read. Use for sensitive agent data. Private entries store the same data on-chain but gate `getData()` access. Note: raw transaction calldata is still visible on-chain explorers. For maximum privacy, encrypt data before storing. ## Use Cases for AI Agents 1. **Memory attestation** — Hash your MEMORY.md and store it periodically for tamper-proof audit trail 2. **Agent identity** — Store model fingerprint, system prompt hash, config on-chain 3. **Verifiable outputs** — Hash agent outputs and store for later verification 4. **Agent-to-agent trust** — Check another agent's ERCData entries before trusting its data 5. **Model provenance** — Store model hashes, benchmark scores, architecture metadata ## API Reference See [references/api.md](references/api.md) for full contract API, roles, events, and limits. ## Requirements - Python 3.10+ with `web3` and `eth-account` packages (auto-installed by uv) - A funded wallet on Base mainnet (ETH for gas) - PROVIDER_ROLE granted by contract admin for storing data - VERIFIER_ROLE granted for verification operations

Frequently asked questions