Seed Round
March 2026 · Base Ecosystem Fund

The missing rail in your stack.

x402 settles machine-to-machine payments. ERC-XXXX settles machine-to-human payments. You built one side of this market. We are building the other. We are seeking a strategic check from Base Ecosystem Fund into our $2M seed round.

Ask Type
Strategic Investment
Check Size
$250K – $500K
Round Size
$2M Seed
Standard
ERC-XXXX on Base
I.
The Market Moment

You built the machine
payment stack. We complete it.

March 18, 2026 — this week — Stripe launched MPP with Tempo, Visa launched CLI for AI agents, and the Agentic Commerce Suite went live with Anthropic, OpenAI, Mastercard, and Shopify integrated on day one. The category you have been building toward with x402 and the Base Agentic Commerce roadmap just received institutional validation from every major payments player simultaneously.

Every protocol in that stack — including your own x402 — solves the same problem: machines paying machines. The humans whose behavioral data powers those machine decisions receive nothing. That asymmetry is the market opportunity ERC-XXXX addresses — and it is native to Base.

"x402 tells the machine how to pay. ERC-XXXX tells the machine who to pay — and enforces it with a ZK proof."
Protocol What it solves Relationship
Google A2A
Agent-to-agent communication and task delegation.
Complements
Anthropic MCP
Agent access to tools and external data context.
Complements
Coinbase x402
Machine-to-machine micropayments over HTTP. The payment rail you built.
Builds on
Stripe MPP
Autonomous agent payments — stablecoin and fiat. Launched Mar 18.
Complements
The fit
ERC-XXXX is not a competitor to x402. It is the human compensation leg that makes x402's machine payment infrastructure complete. When an agent pays via x402 for behavioral data access, ERC-XXXX is what routes that payment to the human who generated the data. The two protocols are designed to compose.
II.
Why Base

EVM-portable standard.
Base as the canonical chain.

ERC-XXXX is chain-agnostic by design — it will eventually be implemented on Arbitrum, Optimism, Ethereum mainnet, and beyond. The chain that ships the reference implementation becomes the canonical reference. That is the strategic position we are offering Base.

What Base gets
First implementation rights — the reference ERC-XXXX deployment lives on Base before any other chain
Named co-author on a potentially canonical open standard the entire EVM ecosystem adopts
x402 completion story — Base can publish the full machine-to-human payment narrative
TikTok-scale consumer proof point — mainstream distribution no other Base ecosystem project has
Equity upside in a seed-stage company at the center of the human data economy
What we get
$250K–$500K strategic check into our $2M seed round
Coinbase Ventures validation — the signal that matters most to co-investors in this round
Access to x402 core team for technical integration on the compensation routing layer
Base ecosystem distribution — featured placement, developer network, co-marketing
Introductions to Coinbase Verified ID for the sybil resistance layer of the standard
The x402 angle
The compensation routing layer of ERC-XXXX is composable with x402's payment rails. When an AI agent queries behavioral data and ERC-XXXX's settleQuery function executes, x402 handles the payment mechanics. Base doesn't just get an ecosystem project — it gets the human-side completion of infrastructure it already built.
III.
The Standard

ERC-XXXX: the interface
that doesn't exist yet.

The standard defines four composable interfaces. The settlement interface — settleQuery — is the novel contribution. No equivalent exists in the current EVM ecosystem. It is the on-chain function that enforces, cryptographically, that humans get paid when agents consume their data.

IERCXXXXSettle.sol — the core innovation
Solidity
// The interface that does not exist anywhere in the current stack.
interface IERCXXXXSettle {
    event QuerySettled(
        address indexed payer,       // The agent operator
        bytes32 indexed queryId,
        uint256          totalFee,
        address          feeToken,    // USDC on Base via x402
        address[]        recipients, // Proven by ZK — tamper-proof
        uint256[]        amounts
    );

    // ZK proof of graph traversal — agent cannot lie about recipients
    function settleQuery(
        bytes32            queryId,
        bytes calldata     proof,
        bytes32[] calldata publicInputs
    ) external payable;

    function verifierContract() external view returns (address);
}

The ZK proof is the architectural differentiator. When an agent queries the behavioral graph, a cryptographic proof attests which human wallet addresses were touched. The smart contract verifies the proof on-chain and distributes payment accordingly. Blue Sky Tech — or any other operator — cannot override the recipient list. Trust is eliminated at the protocol level.

IV.
The Product

Real product.
Real traction.

Blue Sky Tech is a live application capturing human behavioral data — starting with music listening, the most authentic and unfiltered behavioral signal available. The graph is operational. The data loop is proven at beta scale. The TikTok MCP integration gives us a consumer distribution channel that brings non-crypto-native users into the Base ecosystem at mainstream scale.

86%
Retention rate
Beta users
88%
Referral conversion
Virality rate
$0
Customer acquisition cost
100% organic
Why music first
Music listening data is uncurated and unperformed — the closest proxy to authentic human preference available at scale. Spotify, Apple Music, and Tidal have zero incentive to share it. AI agents increasingly need it for autonomous decision-making. Blue Sky captures it at the device layer, with user consent, and routes compensation back to users when agents query it. Music is the proof of concept. The schema extends to every behavioral vertical.
V.
Strategic Value

Beyond the check.
The strategic position.

A $250K–$500K strategic check at seed is not the primary value here. The strategic value is what this investment positions Base to claim in the architecture of the agentic economy.

Canonical chain status
Base is the chain that launched the machine-to-human payment standard. Every subsequent implementation — on Arbitrum, Optimism, Ethereum mainnet — points back to Base as the reference. That is a durable technical leadership position.
x402 narrative completion
Base can now tell a complete story: x402 pays machines, ERC-XXXX pays humans. The full agentic payment stack — from agent query to human compensation — runs on Base. That is a differentiated ecosystem positioning no other L2 has.
Consumer distribution
TikTok MCP integration brings non-crypto-native consumers into the Base ecosystem through a product they already use. The most challenging problem in Web3 — mainstream user acquisition — is solved at the application layer.
New transaction category
Machine-to-human behavioral data compensation is a net-new transaction type on Base. Every query that settles via ERC-XXXX generates on-chain activity, fee revenue, and ecosystem data that demonstrates Base's real-world utility beyond DeFi.
Equity upside
Seed-stage equity in the company that authors the standard, operates the reference implementation, and controls the TikTok distribution channel. If the human data compensation market is real — and Stripe, Visa, and Coinbase just validated that the machine side is — this is early.
VI.
The Ask

$250K – $500K.
Strategic check. Seed terms.

We are raising $2M at seed. We are seeking a strategic check from Base Ecosystem Fund as a named investor — not a grant recipient. Standard equity terms. The check size reflects the strategic value of the Base relationship, not the round's minimum.

Investment Parameters
Round size
$2M seed
Strategic check
$250K – $500K
Instrument
Equity or SAFE — standard terms
First implementation
ERC-XXXX on Base mainnet, reference deployment
Co-authorship
Base Ecosystem Fund named on ERC submission
Three asks
Beyond the check: access to the x402 core team for technical integration on the compensation routing layer — we need to confirm the x402 payment request format can route to settleQuery without a custom extension. Coinbase Verified ID as the optional sybil resistance layer for the pilot. And co-marketing on the pilot launch — Base as the chain that completed the agentic payment stack.
VII.
Timing

The category is being
defined right now.

Three days ago, the entire payments industry aligned on agentic commerce in a single news cycle. The infrastructure layer is settled. The application layer is being built. The standard layer — who defines how humans get compensated — is still open.

We are not asking Base to take a bet on an unproven thesis. Stripe, Visa, Coinbase, and every major AI lab have collectively de-risked the category this week. The question is who defines the human compensation primitive before it gets defined by someone without your infrastructure advantage.

You built x402 so machines can pay machines. We are building ERC-XXXX so machines can pay humans. The stack is incomplete without us. Take the position now.
Blue Sky Tech · March 2026