# Xrpl Standards

> Reference for any XRPL Standard (XLS-N) when implementing or reviewing XRPL protocol features. Trigger on: XLS number (XLS-30, XLS-70), amendment name (AMM, Credentials, MPT, DID, NFToken, Batch, Escrow, Clawback, Firewall, Permissioned DEX, Token Pre-Authorization), transaction type (AMMCreate, CredentialCreate, NFTokenMint, DelegateSet, PermissionedDomainSet, TokenPreauth, BatchSubmit), or ledger object name (Credential, AMM, MPToken, Delegate, Oracle, Bridge, TokenPreauth).

- Skill: `xrplf/xrpl-standards` (Agent Skill, multi-file: 86 files)
- Install (CLI): `npx skillmds@latest add xrplf/xrpl-standards`
- Raw SKILL.md: https://api.skillmd.com/api/skills/xrplf/xrpl-standards/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: xrplf (https://skillmd.com/u/xrplf)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/xrplf/xrpl-standards

---


# XRPL Standards

Raw specification files for all 79 XRPL Standards (XLS-1 through XLS-102), organized by topic. Read the relevant file to get the full spec — field definitions, transaction formats, ledger objects, failure conditions, invariants, and RPC changes.

## How to Use

The path depends on your environment. Find this skill's install directory and read the spec file directly:

```
Read <skill-dir>/references/<topic>/<file>.md
```

Common locations:

- **claude.ai**: `/mnt/skills/user/xrpl-standards/`
- **Claude Code** (`npx skills add`): `.claude/skills/xrpl-standards/` (relative to project root)

To auto-detect, search for the skill directory:

```bash
find /mnt/skills ~/.claude -name "INDEX.md" -path "*/xrpl-standards/references/*" 2>/dev/null | head -1 | sed 's|/references/INDEX.md||'
```

To list or fetch a spec not yet in refs:

```bash
bash <skill-dir>/scripts/list-xls.sh
bash <skill-dir>/scripts/fetch-xls.sh <number>
```

---

## identity — DID, credentials, sign-in

| XLS | Title | Status | File |
| ----- | ------- | -------- | ------ |
| 40 | Decentralized Identity — `DID` obj, `DIDSet`, `DIDDelete` | Final | `references/identity/xls-0040.md` |
| 63 | SignIn Transaction — off-chain auth, `sfData` field | Stagnant | `references/identity/xls-0063.md` |
| 70 | On-Chain Credentials — `Credential` obj, `CredentialCreate/Accept/Delete`, `DepositPreauth` ext | Final | `references/identity/xls-0070.md` |

## tokens — NFT, MPT, URIToken

| XLS | Title | Status | File |
| ----- | ------- | -------- | ------ |
| 20 | Non-Fungible Tokens — `NFToken`, `NFTokenMint/Burn/CreateOffer/AcceptOffer/CancelOffer` | Final | `references/tokens/xls-0020.md` |
| 33 | Multi-Purpose Tokens (MPT) — `MPTokenIssuance`, `MPTokenIssuanceCreate/Destroy/Set`, `MPTokenAuthorize` | Final | `references/tokens/xls-0033.md` |
| 35 | URITokens — `URIToken` obj, `URITokenMint/Burn/CreateOffer/BuyOffer/CancelOffer` | Draft | `references/tokens/xls-0035.md` |
| 46 | Dynamic NFTs — mutable metadata extension to NFToken | Final | `references/tokens/xls-0046.md` |
| 51 | NFToken Escrows | Stagnant | `references/tokens/xls-0051.md` |
| 52 | NFTokenMintOffer — combined mint + offer tx | Final | `references/tokens/xls-0052.md` |
| 54 | NFTokenOffer Destination Tag | Stagnant | `references/tokens/xls-0054.md` |
| 61 | Cross-Currency NFTokenAcceptOffer | Stagnant | `references/tokens/xls-0061.md` |
| 87 | Token Pre-Authorization — issuer approval by account, credential, or domain | Stagnant | `references/tokens/xls-0087.md` |
| 89 | MPT Metadata Schema | Final | `references/tokens/xls-0089.md` |
| 90 | Permissioned Domains for MPTs | Draft | `references/tokens/xls-0090.md` |
| 94 | Dynamic MPT — mutable MPToken fields | Final | `references/tokens/xls-0094.md` |
| 96 | Confidential MPT — `ConfidentialMPTConvert/Send/MergeInbox/ConvertBack/Clawback` | Final | `references/tokens/xls-0096.md` |
| 99 | ElGamal Key Rotation for Confidential MPTs — issuer, auditor, and holder key rotation and recovery | Draft | `references/tokens/xls-0099.md` |
| 10 | Non-Transferable Token standard | Stagnant | `references/tokens/xls-0010.md` |
| 16 | NFT Metadata v1 | Stagnant | `references/tokens/xls-0016.md` |
| 24 | NFT Metadata v2 | Final | `references/tokens/xls-0024.md` |
| 26 | IOU Token Metadata via xrp-ledger.toml | Draft | `references/tokens/xls-0026.md` |

## defi — AMM, DEX, vault, lending, options

| XLS | Title | Status | File |
| ----- | ------- | -------- | ------ |
| 30 | Automated Market Maker — `AMM` obj, `AMMCreate/Deposit/Withdraw/Vote/Bid/Delete` | Final | `references/defi/xls-0030.md` |
| 73 | AMM Clawback — `AMMClawback` tx | Draft | `references/defi/xls-0073.md` |
| 81 | Permissioned DEX — `OfferCreate`/`Payment` extensions, `PermissionedDomain` gating | Final | `references/defi/xls-0081.md` |
| 82 | MPT Integration into DEX, `MPTVersion2` amendment extending XLS-33/XLS-30 to MPT | Draft | `references/defi/xls-0082.md` |
| 65 | Single Asset Vault — `Vault` obj, `VaultCreate/Set/Delete/Deposit/Withdraw` | Draft | `references/defi/xls-0065.md` |
| 66 | Lending Protocol — `LoanBroker`, `Loan` objs, 9 new transactions | Draft | `references/defi/xls-0066.md` |
| 98 | Standard Metadata for Vaults, JSON convention for `Vault.Data` | Draft | `references/defi/xls-0098.md` |
| 62 | Options — option contract transactions | Stagnant | `references/defi/xls-0062.md` |
| 60 | Default AutoBridge | Stagnant | `references/defi/xls-0060.md` |

## payments — escrow, channels, batch, remit

| XLS | Title | Status | File |
| ----- | ------- | -------- | ------ |
| 56 | Atomic/Batch Transactions — `Batch` tx, inner transaction handling | Final | `references/payments/xls-0056.md` |
| 85 | Token-Enabled Escrows — escrow/channel support for IOU and MPT | Final | `references/payments/xls-0085.md` |
| 100 | Smart Escrows — programmable escrow conditions | Draft | `references/payments/xls-0100.md` |
| 55 | Remit — `Remit` tx for bundled transfers | Final | `references/payments/xls-0055.md` |
| 34 | Token Payment Channels & Escrow (Withdrawn, superseded by XLS-85) | Withdrawn | `references/payments/xls-0034.md` |
| 67 | Charge | Stagnant | `references/payments/xls-0067.md` |
| 76 | Min Incoming Amount (Deprecated) | Deprecated | `references/payments/xls-0076.md` |

## accounts — permissions, freeze, signer lists, reserves

| XLS | Title | Status | File |
| ----- | ------- | -------- | ------ |
| 74 | Account Permissions — granular tx-level permission flags | Final | `references/accounts/xls-0074.md` |
| 75 | Permission Delegation — `Delegate` obj, `DelegateSet` tx | Final | `references/accounts/xls-0075.md` |
| 80 | Permissioned Domains — `PermissionedDomain` obj, `PermissionedDomainSet/Delete` | Final | `references/accounts/xls-0080.md` |
| 86 | Firewall — account-level transaction filtering | Draft | `references/accounts/xls-0086.md` |
| 77 | Deep Freeze — enhanced freeze for trust lines | Final | `references/accounts/xls-0077.md` |
| 39 | Clawback — issuer clawback of IOU balances | Final | `references/accounts/xls-0039.md` |
| 68 | Sponsored Fees and Reserves — `Sponsorship` obj, fee/reserve delegation | Draft | `references/accounts/xls-0068.md` |
| 49 | Multiple Signer Lists | Draft | `references/accounts/xls-0049.md` |
| 64 | Pseudo-Account | Draft | `references/accounts/xls-0064.md` |
| 23 | Lite Accounts | Stagnant | `references/accounts/xls-0023.md` |
| 7 | Deletable Accounts | Final | `references/accounts/xls-0007.md` |
| 71 | Initial Owner Reserve Exemption | Stagnant | `references/accounts/xls-0071.md` |

## data — oracles, subscriptions

| XLS | Title | Status | File |
|-----|-------|--------|------|
| 47 | Price Oracles — `Oracle` obj, `OracleSet/Delete`, price aggregation RPC | Final | `references/data/xls-0047.md` |
| 78 | Subscriptions — on-chain payment streams | Draft | `references/data/xls-0078.md` |

## cross-chain — bridge, proof of payment

| XLS | Title | Status | File |
|-----|-------|--------|------|
| 38 | Cross-Chain Bridge — `Bridge` obj, `XChainCreateBridge`, locking/claiming txs | Final | `references/cross-chain/xls-0038.md` |
| 41 | XPOP — proof-of-payment standard, off-chain verification format | Final | `references/cross-chain/xls-0041.md` |

## smart-contracts — plugins, WASM, contracts

| XLS | Title | Status | File |
|-----|-------|--------|------|
| 101 | Smart Contracts — `Contract/ContractSource/ContractData` objs, `ContractCreate/Call/Modify/Delete` | Draft | `references/smart-contracts/xls-0101.md` |
| 102 | WASM VM — virtual machine specification | Draft | `references/smart-contracts/xls-0102.md` |
| 42  | Plugins — plugin ledger objects | Stagnant | `references/smart-contracts/xls-0042.md` |

## core — protocol fundamentals

| XLS | Title | Status | File |
| ----- | ------- | -------- | ------ |
| 13 | Tickets — `Ticket` obj, `TicketCreate` tx | Final | `references/core/xls-0013.md` |
| 37 | CTID — Concise Transaction Identifier encoding | Final | `references/core/xls-0037.md` |
| 69 | Simulate — `simulate` RPC for dry-run execution | Final | `references/core/xls-0069.md` |
| 97 | Server Definitions — `server_definitions` RPC enhancements | Final | `references/core/xls-0097.md` |
| 22 | API Versioning | Final | `references/core/xls-0022.md` |
| 45 | Prepublish Validator Lists | Final | `references/core/xls-0045.md` |
| 17 | XFL — developer-friendly balance representation | Final | `references/core/xls-0017.md` |
| 5 | Tagged Addresses | Final | `references/core/xls-0005.md` |
| 8 | Tickets (withdrawn, superseded by XLS-13) | Withdrawn | `references/core/xls-0008.md` |
| 9 | Blinded Tags | Stagnant | `references/core/xls-0009.md` |
| 11 | Retiring Amendments | Final | `references/core/xls-0011.md` |
| 12 | Secret Numbers | Final | `references/core/xls-0012.md` |
| 15 | Concise Transaction Identifier (withdrawn, superseded by XLS-37) | Withdrawn | `references/core/xls-0015.md` |
| 18 | Bootstrapping XRPLD Networks | Stagnant | `references/core/xls-0018.md` |
| 21 | Asset Code Prefixes | Stagnant | `references/core/xls-0021.md` |
| 25 | Enhanced Secret Numbers | Final | `references/core/xls-0025.md` |
| 32 | Request URI Structure | Stagnant | `references/core/xls-0032.md` |
| 50 | Validator TOML Infrastructure | Final | `references/core/xls-0050.md` |
| 95 | Rename rippled → xrpld | Draft | `references/core/xls-0095.md` |
| 1 | XLS Process and Guidelines | Living | `references/core/xls-0001.md` |

## ecosystem — wallets, URIs, icons

| XLS | Title | Status | File |
| ----- | ------- | -------- | ------ |
| 2 | Destination Information | Stagnant | `references/ecosystem/xls-0002.md` |
| 3 | Deeplink Signed Transactions | Stagnant | `references/ecosystem/xls-0003.md` |
| 4 | Trustline Add URI | Stagnant | `references/ecosystem/xls-0004.md` |
| 6 | Visual Account Icons | Final | `references/ecosystem/xls-0006.md` |

---

## Refreshing Refs

Use the local sync script in this repo:

```bash
python3 .agents/skills/xrpl-standards/scripts/sync-xls-standards.py
```

Run with `--dry-run` to inspect changes without writing files.

- `--extract` writes the compressed extracted summary.
- Default writes full upstream `README.md` content.

A GitHub Action also runs this script every Monday and Thursday at 06:00 UTC:

- `.github/workflows/sync-xrpl-standards.yml`