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SDFSKILL.md

Stellar standards, ecosystem, and reference. Covers SEPs (Stellar Ecosystem Proposals), CAPs (Core Advancement Proposals), and a quick map for picking the righ…

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Stellar standards, ecosystem, and reference. Covers SEPs (Stellar Ecosystem Proposals), CAPs (Core Advancement Proposals), and a quick map for picking the right standard for wallets, anchors, payments, deposits/withdrawals, federation, deep links, and KYC. Also bundles ecosystem references (DeFi protocols, dev tools, wallets, infra, community projects) and curated documentation links. Use when you need to know which SEP applies, or want a starting point for ecosystem integrations and official docs.

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standards · SDF
SKILL.md

Standards, Ecosystem, and Resources

Three things bundled because they're all reference material you reach for in the same moment: "which standard handles X?", "is there an existing project doing Y?", and "where's the canonical doc for Z?".

When to use this skill

  • Picking the right SEP for an integration (anchors, deposits, federation, deep links, KYC, paths)
  • Checking CAP status for a protocol feature you want to rely on
  • Finding existing DeFi protocols, wallets, or infrastructure to integrate with rather than rebuild
  • Locating official docs, SDKs, or community resources

Related skills

  • Implementing a SEP-41 token interface → ../assets/SKILL.md, ../soroban/SKILL.md
  • Frontend SEP-7 / SEP-10 flows → ../dapp/SKILL.md
  • CAPs for cryptography (BLS, BN254, Poseidon) → ../zk-proofs/SKILL.md
  • x402/MPP protocol context → ../agentic-payments/SKILL.md

Part 1: SEP / CAP Standards Reference

When to use this guide

Use this when you need:

  • The right SEP/CAP for a feature or integration
  • Interoperability guidance for wallets, anchors, and contracts
  • A fast map from use case to official standards docs

Maintenance note

Standards status can change quickly. Before implementation, verify current status in:

Treat this file as a routing map, not a source of final governance/status truth.

High-value SEPs for app developers

Contracts and token interfaces

Auth, identity, and metadata

Anchor and fiat integration

High-value CAPs for Soroban developers

Soroban foundations

  • CAP-0046: Soroban overview
  • CAP-0046 subdocuments (cap-0046-*.md): runtime, lifecycle, host functions, storage, auth, metering

Frequently used contract capabilities

  • CAP-0051: secp256r1 verification (passkey-related cryptography)
  • CAP-0053: TTL extension behavior
  • CAP-0058: constructors (__constructor)
  • CAP-0059: BLS12-381 primitives
  • CAP-0067: protocol/runtime improvements including asset/event model changes

Newer and draft crypto/features

  • CAP-0074: BN254 host functions proposal
  • CAP-0075: Poseidon/Poseidon2 proposal
  • CAP-0079: muxed-address strkey conversion proposal

Use the CAP preamble status fields as the source of truth for implementation readiness.

Quick mapping by use case

I am building a fungible token

  1. Start with SEP-0041 interface expectations.
  2. Prefer Stellar Assets + SAC interop unless custom logic is required.
  3. If regulated, review SEP-0057 patterns.

I need upgrade-safe contracts

  1. Read SEP-0049 guidance for upgrade process design.
  2. Use CAP-0058 constructors for atomic initialization where protocol support exists.
  3. Add migration/versioning strategy before deploying upgradeable contracts.

I am building a smart-wallet flow

  1. Use SEP-0010 for web authentication flows.
  2. Review CAP-0051 for passkey-related cryptographic primitives.
  3. Align wallet UX and signing payloads with current SDK guidance.

I need anchor integration for fiat rails

  1. SEP-0006 for API-first flows.
  2. SEP-0024 for hosted interactive rails.
  3. SEP-0031 when supporting payment corridors.
  4. SEP-0012 for KYC data requirements.

Practical workflow for AI agents

  • Step 1: Identify feature category (token, wallet auth, anchor, upgradeability).
  • Step 2: Link user to the 1-3 primary SEP/CAP docs.
  • Step 3: Check status/acceptance in the source repo before asserting support.
  • Step 4: Implement only what is active on the target network/protocol.
  • Step 5: Document dependencies on draft standards explicitly.

Related docs

Part 2: Stellar Ecosystem

This guide catalogs the major projects, protocols, and tools in the Stellar ecosystem. Use this as a reference when building on Stellar to find relevant integrations, examples, and community projects.

Canonical directories — For the most up-to-date project lists, check:

Treat project metrics/status as volatile. Validate latest activity and production readiness before taking dependencies.

DeFi Protocols

Lending & Borrowing

Blend Protocol

Universal liquidity protocol enabling permissionless lending pools.

Slender

First non-custodial lending protocol on Soroban with flash loan support.

  • Use Case: Lending, borrowing, flash loans
  • Features: Pool-based strategy, sTokens, dTokens, utilization caps
  • Oracle: SEP-40 compatible (Reflector)

DEXs & AMMs

Soroswap

First DEX and aggregator on Stellar/Soroban.

Aquarius / AQUA Network

Governance-driven liquidity layer with AMM functionality.

Phoenix Protocol

AMM protocol on Soroban.

Yield & Vaults

DeFindex

Yield aggregation and vault infrastructure by PaltaLabs.

  • Use Case: Tokenized vaults, yield strategies, DeFi abstraction
  • Docs: https://docs.defindex.io
  • Features: Automated rebalancing, vault management, Blend integration

Stablecoins & CDPs

Orbit CDP Protocol

Collateralized stablecoin issuance (USD, EUR, MXN).

  • Use Case: Mint stablecoins against XLM/bond collateral
  • Docs: https://docs.orbitcdp.finance
  • Features: Multi-currency stablecoins, Pegkeeper automation, Blend integration

Wallets

Browser Extensions

Freighter

SDF's flagship non-custodial browser wallet.

xBull

Feature-rich browser wallet with advanced capabilities.

Albedo

Lightweight web-based wallet and signing provider.

Rabet

Browser extension wallet for Stellar.

Hana Wallet

Modern Stellar wallet with DeFi features.

Mobile Wallets

LOBSTR

Most popular Stellar mobile wallet.

  • Website: https://lobstr.co
  • Platforms: iOS, Android, Web
  • Features: DEX trading, multisig, 2FA, asset discovery

Beans

Payments platform with yield features.

  • Use Case: Payments, earning (via DeFindex/Blend)
  • Features: Non-custodial yield generation

Multi-Wallet Integration

Stellar Wallets Kit

SDK for integrating multiple Stellar wallets.

Developer Tools

Smart Account & Authentication

Smart Account Kit (Recommended)

Comprehensive TypeScript SDK for OpenZeppelin Smart Accounts on Stellar/Soroban.

  • GitHub: https://github.com/kalepail/smart-account-kit
  • Use Case: Production smart wallets with passkeys
  • Built On: OpenZeppelin stellar-contracts
  • Features:
    • Context rules with fine-grained authorization scopes
    • Policy support (threshold multisig, spending limits, custom policies)
    • Session management with automatic credential persistence
    • External wallet adapter support (Freighter, LOBSTR, etc.)
    • Built-in indexer for contract discovery
    • Multiple signer types (passkeys, Ed25519, policies)

Passkey Kit (Legacy)

Original TypeScript SDK for passkey-based smart wallets.

OpenZeppelin Relayer

Service for fee-sponsored transaction submission.

Data Indexing

For a full directory of indexing options, see Stellar Indexer Docs.

Mercury

Stellar-native data indexing platform with Retroshades technology.

SubQuery

Multi-chain indexer supporting Stellar and Soroban.

Goldsky

Real-time data replication and subgraph platform.

Zephyr VM

Cloud execution environment for blockchain data processing.

Contract Libraries

OpenZeppelin Stellar Contracts

Audited smart contract library for Soroban (track latest release tags before pinning versions).

Security Tools

Scout Soroban (CoinFabrik)

Open-source vulnerability detector with 23 detectors for Soroban contracts.

OpenZeppelin Security Detectors SDK

Framework for building custom security detectors for Soroban.

Certora Sunbeam Prover

Formal verification for Soroban — first WASM platform supported by Certora.

Runtime Verification — Komet

Formal verification and testing tool designed for Soroban (SCF-funded).

Soroban Security Portal (Inferara)

Community security knowledge base (SCF-funded).

CLI & SDKs

Stellar CLI

Official command-line interface for Stellar/Soroban.

Stellar SDK (JavaScript)

Official JavaScript/TypeScript SDK.

Soroban Rust SDK

Rust SDK for Soroban contract development.

Oracles

Reflector Network

Community-powered price oracle for Stellar.

DIA Oracle

Cross-chain oracle with 20,000+ asset support.

Band Protocol

Cross-chain data oracle on BandChain.

Gaming & NFTs

Litemint

NFT marketplace and gaming platform.

Infrastructure

Anchors & On/Off Ramps

Stellar Ramps

Suite of open standards for fiat-crypto bridges.

Anchor Platform

SDF-maintained platform for building SEP-compliant anchors.

Block Explorers

StellarExpert

Comprehensive network explorer with analytics.

Stellar Lab

Developer tools and transaction builder.

StellarChain

Alternative explorer with contract support.

Disbursements

Stellar Disbursement Platform (SDP)

Bulk payment infrastructure for enterprises.

Example Repositories

Official Examples

Soroban Examples

Official educational smart contract examples.

Soroban Example dApp

Crowdfunding dApp with Next.js frontend.

Community Examples

Soroban Guide (Xycloo)

Learning resources and example contracts.

Soroban Contracts (icolomina)

Governance and investment contract examples.

Oracle Example

Publisher-subscriber oracle pattern.

OZ Stellar NFT

Simple NFT using OpenZeppelin.

Cross-Chain

Axelar

Cross-chain gateway and Interchain Token Service for Soroban.

Allbridge Core

Cross-chain stable swap bridge (Stellar is 10th supported chain).

  • Use Case: Cross-chain stablecoin transfers (USDC between Stellar, Base, Arbitrum, etc.)
  • Features: Automatic Stellar account activation, liquidity pools

LayerZero

Omnichain interoperability protocol with Stellar support.

  • Use Case: Cross-chain messaging, token bridging (OFT/ONFT), dApp interoperability
  • Features: OApp standard, Omni-Chain Fungible Tokens, native issuer minting/burning control

Builder Teams & Companies

Notable teams shipping production-level code on Stellar/Soroban. For a broader directory, see Stellar Ecosystem.

TeamWebsiteGitHubX/TwitterNotable Projects
Lightsail Networklightsail.networklightsail-network@overcat_meQuasar RPC, Java/Python SDKs, Ledger app, validators
PaltaLabspaltalabs.iopaltalabs@PaltaLabsSoroswap, DeFindex
Aha Labsahalabs.devAhaLabs@AhaLabsDevScaffold Stellar, Soroban CLI contributions
OpenZeppelinopenzeppelin.comOpenZeppelin@OpenZeppelinContracts library, Relayer, Monitor, Security Detectors SDK
Cheesecake Labscheesecakelabs.comCheesecakeLabs@CheesecakeLabsStellar Plus library
Script3 / Blend Capitalscript3.ioscript3, blend-capital@script3officialBlend Protocol
Xycloo Labsxycloo.comXycloo@heytdepMercury indexer, Zephyr VM
CoinFabrikcoinfabrik.comCoinFabrik@coinfabrikScout Soroban (static analysis)
Creit Techcreit.techCreit-Tech@CreitTech_Stellar Wallets Kit, xBull, SorobanHub
Ultra Stellarultrastellar.comlobstrco@LobstrcoLOBSTR wallet, StellarExpert

Project Directories

Official Directories

Stellar Ecosystem Directory

The canonical, up-to-date project directory maintained by SDF.

  • Website: https://stellar.org/ecosystem
  • Features: Search by country, asset, category
  • Includes: DeFi, wallets, anchors, on/off ramps, exchanges, infrastructure

SCF Project Tracker

All Stellar Community Fund–funded projects with status and milestones.

Funding Programs

Stellar Community Fund (SCF)

Grants up to $150K per funding round.

Soroban Audit Bank

Security audit funding for SCF projects.

Real-World Assets

Major Issuers on Stellar

  • Franklin Templeton: Regulated fund tokens
  • Ondo: Tokenized real estate
  • RedSwan: $100M commercial real estate
  • Centrifuge: Yield-generating tokens
  • WisdomTree: Asset-backed tokens

Stablecoins

  • USDC (Circle): Primary USD stablecoin
  • EURC (Circle): EUR stablecoin
  • PYUSD (PayPal): Verify current issuance and distribution details before launch planning

Enterprise Integrations

Major companies building on Stellar:

  • PayPal: PYUSD stablecoin
  • Visa: Settlement infrastructure
  • Mastercard: Payment rails
  • Wirex: USDC/EURC settlement
  • U.S. Bank: Custom stablecoin testing
  • PwC: Stablecoin exploration

Part 3: Curated Resources

Official Documentation

Stellar Developer Docs

API References

SDKs

Client SDKs (Application Development)

Contract SDK (Soroban Development)

CLI Tools

Stellar CLI

Scaffold Stellar

Quickstart (Local Development)

Contract Libraries & Tools

OpenZeppelin Stellar Contracts

Smart Account SDKs

Developer Tools

Example Repositories

Official Examples

Community Examples

Ecosystem Projects

For DeFi protocols, wallets, oracles, gaming/NFTs, cross-chain bridges, and builder teams, see Part 2: Stellar Ecosystem below.

Security

For vulnerability patterns, checklists, and detailed tooling guides, see Soroban security section.

Bug Bounty Programs

Audit Bank & Audit Firms

  • Soroban Audit Bank - $3M+ deployed, 43+ audits
  • Audited Projects List - Public audit registry
  • Partners: OtterSec, Veridise, Runtime Verification, CoinFabrik, QuarksLab, Coinspect, Certora, Halborn, Zellic, Code4rena

Static Analysis

Formal Verification

Security Resources

Zero-Knowledge Proofs (Status-Sensitive)

For comprehensive ZK development guidance, see zk-proofs.md.

Always verify CAP status and network support before treating any ZK primitive as production-available.

Protocol & Specifications

SDK Documentation

Proving Systems & Tooling

Example Contracts

  • Soroban Examples - Official examples (includes groth16_verifier, privacy-pools, import_ark_bn254)

Testing

Testing Guides

Local Development

Test Networks

Data & Analytics

Data Documentation Hub

Block Explorers

Data Indexers

Historical Data & Analytics

  • Hubble - BigQuery dataset (updated every 30 min)
  • Galexie - Data pipeline for building data lakes
  • Data Lake - Powers RPC Infinite Scroll (public via AWS Open Data)

Infrastructure

Anchors & On/Off Ramps

Disbursements

RPC Providers

Protocol & Governance

Stellar Protocol

Key SEP Standards

Network Upgrades

Project Directories & Funding

Ecosystem Discovery

Funding Programs

Learning Resources

Official Tutorials

Video Content

Developer Tools

Blog Posts & Guides

Stablecoins on Stellar

Major Stablecoins

Asset Discovery

Community

Developer Resources

Key People to Follow

Builders and contributors actively shaping the Stellar/Soroban ecosystem:

NameGitHubX/TwitterFocus
Tyler van der Hoevenkalepail@kalepailSDF DevRel, Smart Account Kit, Passkey Kit, Launchtube
Leigh McCullochleighmcculloch@leighSDF core engineer, Stellar CLI, Soroban SDK
James Bachinijamesbachini@james_bachiniSDF Dev in Residence, Soroban Playground, tutorials
Elliot VorisElliotFriend@ElliotFriendSDF DevRel, community education
Carsten Jacobsencarstenjacobsen—SDF, weekly dev meetings, Soroban examples
Esteban Iglesiasesteblock@esteblock_devPaltaLabs, Soroswap, DeFindex
Markus Paulson-Lunamarkuspluna@script3officialScript3, Blend Protocol
Alexander Mootzmootz12—Script3, Blend contracts
Tommasoheytdep@heytdepXycloo Labs, Mercury indexer, ZephyrVM
OrbitLensorbitlens@orbitlensReflector oracle, StellarExpert, Albedo
Frederic RezeauFredericRezeau@FredericRezeauLitemint, soroban-kit, gaming
Jun Luo (Overcat)overcat@overcat_meLightsail Network, Quasar RPC, Java/Python SDKs, Ledger app
Jay Gengjayz22—SDF, Soroban SDK, confidential tokens
Chad Ostrowskichadoh@chadohAha Labs CEO, Scaffold Stellar, Soroban CLI
Willem Wyndhamwillemneal@willemnealAha Labs co-founder, Scaffold Stellar, JS contract client

Builder Teams & Companies

See Part 2: Stellar Ecosystem above for a table of teams shipping production code on Stellar/Soroban, with GitHub orgs, websites, and Twitter handles.

Foundation

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