📌 The Problem

Today, builders have no unified way to prove who they are or what they’ve done. Every time they join a hackathon, apply for a bounty, or look for teammates, the same loop repeats — sending DMs, filling out forms, sharing links.

There’s no persistent identity that connects wallet → person → proof of work. This fragmentation makes collaboration slow and trust hard to build.

Project owners struggle to find reliable contributors, and talented builders lose visibility beyond their immediate circles.

Even after completing real onchain work, there’s no easy way to showcase achievements, verify experience, or turn reputation into new opportunities.

📌 The Solution - BaseCard

BaseCard becomes an onchain business card that instantly displays a builder’s identity and proof of work — both onchain and offchain.

It standardizes how builders present themselves, linking wallets, socials, and verifiable contributions into a single identity layer.
📌 Base Earn — Turning Identity into Action

Base Earn extends that foundation into action.
It connects verified builders with paid opportunities, and every completed task automatically updates their BaseCard — compounding trust across the network.

Together, BaseCard and Base Earn make building easier, safer, and faster, by turning every piece of work into verifiable reputation that lives onchain.

📌 Why We Introduced BC Token

We added BC Token to reinforce the trust loop between identity and action. BaseCard and Base Earn already verify who you are and what you’ve built — but we needed a native incentive layer that rewards meaningful participation and discourages spam.

BC Token turns every step of the builder journey into a verifiable signal:

• Earn BC by proving identity — creating your BaseCard, linking socials, adding proof of work.
• Spend BC when applying for bounties — signaling commitment and filtering serious builders.

This simple earn → spend mechanism keeps the ecosystem trust-based, spam-free, and self-sustaining.
It’s not just a token — it’s how we turn effort into reputation, and reputation into opportunity.

We faced both technical and conceptual challenges while building BaseCard and Base Earn.

Technically, it was our first time using Next.js, so we had to learn the framework while building. Setting up the miniapp development environment was also tricky — there was little documentation or local testing support. We experimented with tools like ngrok, localtunnel, and erual to make the miniapp run smoothly

Conceptually, my main challenge was designing how BaseCard and Base Earn could become a self-sustaining loop rather than just two connected features. I wanted every action — from proving identity to completing work — to feed back into trust and opportunity. That idea led to the BC Token system, where builders earn tokens by verifying their work and spend them when applying for new bounties.

These challenges helped us better understand the Base ecosystem and shape what we now call the onchain builder trust loop.

https://github.com/4uphwang/base-batch-mini-app

https://basecard.vercel.app

Most builder platforms help you apply for gigs or get paid — but they don’t help you show who you are: what you’ve built and why you’re trusted.

BaseCard changes that.
It lets builders instantly mint a clean, scannable digital card that unifies their wallet, socials, and proof of work into one verifiable onchain identity.

Inside the card, anyone can explore past projects, completed Earn tasks, and proof links — all updating automatically as you build.
Every time a builder completes a task through Base Earn, their new achievements sync directly to their BaseCard — no DMs, no spreadsheets, no manual updates.

Our alpha build already demonstrates this:

• Mint your BaseCard in seconds
• Add info and proof links
• Complete Earn tasks and see them reflected instantly

It’s simple, useful, and trust-building — a practical way for builders to turn proof of work into reputation, and reputation into opportunityacross the Base ecosystem.

Our target users are builders — the people who design, code, write, and launch projects in the Web3 space. They’re developers, designers, marketers, and community contributors who constantly collaborate across hackathons, bounties, and side projects.

We started by observing a simple pain point in our own experience: every time we met new collaborators, we had to repeat the same steps — “Who are you?”, “What have you built?”, “Send me your links.”

There was no single place where our past work and identity could live together.

So we built BaseCard first for ourselves, then shared the prototype with friends and teammates we met through events like Running Base Korea and Hackathon meetups.
We received consistent feedback:

“It’s annoying to send my links every time.”
“I wish I had one card that just shows everything.”

That validation shaped our alpha.
We confirmed that our ideal users are not only builders like us,
but also project owners who want to quickly assess and recruit reliable talent.

Both sides of the builder economy — those who build, and those who need builders — benefit from having a simple, verifiable way to present and discover proof of work.

📍Competitors

1. LINK3 — https://link3.to
   
   Link3 creates aggregated social profiles that connect wallets, socials, and NFTs with an event system for Proof-of-Attendance.

• Strengths: clean UX, strong social connectivity, cross-platform visibility.
• Weaknesses: focuses on where you were, not what you built. Lacks a reward or matching layer — participation doesn’t translate into opportunity.
• How BaseCard is different: BaseCard captures Proof-of-Work, not just presence. It turns verified contributions into discoverable, rewardable identity.

2. BOUNTYCASTER — https://bountycaster.xyz
   
   A lightweight, viral bounty layer for Farcaster and X. Builders can post or complete tasks just by tagging @bountybot — no signup or wallet needed.

• Strengths: low friction, social virality, proven demand for open bounties.
• Weaknesses: no persistent identity, no onchain reputation or portfolio.
• How BaseCard is different: BaseCard connects each bounty to a verified builder profile, creating a long-term identity and reputation system that compounds with every task.

3. SUPERTEAM EARN — https://earn.superteam.fun
   
   A curated bounty and task network on Solana that has distributed $2M+ in rewards.

• Strengths: strong community credibility, fast payouts, proven market fit.
• Weaknesses: reputation and submissions are off-chain, and builder identity is fragmented.
• How BaseCard is different: BaseCard brings this proven demand onchain — turning builder identity, task history, and reputation into a single verifiable layer on Base.

📍Why We Win

• Onchain Resume, Not Just Profile — We standardize verifiable Proof-of-Work across wallets, socials, and contributions.
• Earn Loop That Reinforces Trust — Every interaction strengthens identity and opportunity through the BC token economy.
• Composability as Network Effect — Base-native schema and APIs allow other apps (grants, DAOs, hackathons) to directly plug into BaseCard as the builder identity layer.

⚡ WHY NOW

• The identity gap on Base is real — no native reputation layer yet.
• The Proof-of-Work era is starting — credibility now depends on contribution, not speculation.
• Base’s 1B-user mission needs trust infrastructure — BaseCard provides it first.