Soulbound credentials | Loyalty Stacker Docs

Give your community proof they can’t buy, sell, or fake: permanent on-chain badges that say “I was here, I did this, I belong.”

The one-liner

A Soulbound Token is a non-transferable NFT (a credential that can only be earned, never bought), so it becomes durable proof of who actually did the work.

What it is

Soulbound Token (SBT)

A non-transferable NFT: a credential a member claims to their own wallet that stays there for good. Unlike a normal collectible, it can never be traded away, sold, or transferred to someone else. That permanence is the point. An SBT is living proof of an achievement, a membership, or a completed action that only the person who earned it can hold.

With Loyalty Stacker, you award SBTs as quest rewards. A member finishes the task, claims the credential, and mints it to their wallet, where it becomes a verifiable, on-chain part of their reputation.

Transferable vs. soulbound

A soulbound credential is built on the same NFT engine as a normal collectible. It’s simply minted with the transferability switch turned off. That one difference changes everything about what the badge proves.

Transferable NFT

Can be traded, sold, or sent to another wallet.
Has a secondary market. Anyone can buy their way in.
Proves ownership today, not how it was obtained.

Soulbound credential

Non-transferable. It stays in the wallet that earned it for good.
No secondary market and no way to fake one.
Proves the holder genuinely did the thing it stands for.

Permanence is the feature

Once a member claims an SBT, it can never be moved. That’s intentional. A credential that could be sold or transferred would stop being proof. Reach for a transferable mint instead when you want a tradeable collectible; see NFT minting & contracts.

What you can do

Award SBTs as quest rewards

Attach a soulbound credential to any quest. When a member completes it, the “Claim” option unlocks and they mint the SBT to their own wallet.

Design the credential

Give each SBT a name, a description, and custom artwork so it reflects the achievement it represents.

Guarantee it's earned, not bought

Because SBTs are non-transferable, there's no secondary market and no way to fake one, and Loyalty Stacker only authorizes a claim once it confirms the member genuinely completed the quest.

One per member, automatically

Each member can earn a given SBT only once. Loyalty Stacker tracks every claim, prevents duplicates, and shows members which credentials they've collected.

Use credentials to unlock more

An SBT a member already holds can act as a key: gate other quests, perks, or experiences so they're available only to people who carry the right badge.

Each badge is an on-ramp to the next

Because a held credential can gate the next quest, earning one SBT becomes the start of a ladder. Every badge a member collects opens the door to more.

Examples & use cases

“OG member” badge

Reward your earliest supporters with a permanent founding-member credential that newcomers can never acquire.

Proof-of-completion certificate

Issue a verifiable on-chain certificate when someone finishes a course, a challenge, or a multi-step campaign.

Tiered membership credential

Hand out bronze, silver, and gold credentials as members level up, and gate premium perks behind the higher tiers.

Event attendance

Give attendees a soulbound “I was there” token that proves participation in a launch, an IRL meetup, or a live stream.

Why it matters

Points and giveaways can be gamed; transferable rewards can be bought. Soulbound credentials can’t. They turn participation into a durable, portable reputation that lives in the member’s own wallet, something they carry with pride and that other communities can recognize.

For you, that means a loyalty signal you can trust:

A reliable way to identify your true believers.
A way to reward real achievement, not just clicks or wallet balances.
An inner circle no one can shortcut their way into.

How it works

1
Create the credential
Design an SBT with its name, description, and artwork, and connect it to one of your collections.
2
Attach it to a quest
Set the SBT as the reward for any quest you want to recognize.
3
Member earns it
Once they complete the quest, Loyalty Stacker confirms the completion and unlocks the claim.
4
Member claims it
They mint the credential to their own wallet in one tap; it’s permanently theirs and can never be transferred.
5
Put it to work
Gate other quests and perks behind the credential, so each badge a member earns opens the door to more.