# Lerian > Documentation for Lerian's core banking platform: Midaz ledger, Tracer, Reporter, Matcher, Flowker, Lender, Brazilian payment rails, Access Manager, Console and APIs. - [Lerian Products (397 pages)](https://docs.lerian.studio/_llms/en/lerian-products.txt): Documentation for Lerian Products. - [Brazil Rails (155 pages)](https://docs.lerian.studio/_llms/en/brazil-rails.txt): Documentation for Brazil Rails. - [API Reference (1981 pages)](https://docs.lerian.studio/_llms/en/api-reference.txt): Documentation for API Reference. ## Home - [Welcome](https://docs.lerian.studio/en/index.md): Guides, platform capabilities, API references, and integration tutorials for the Lerian core banking platform: Midaz, the products around it, Brazil Rails, and Interfaces. ## Start Here ### Introduction - [Welcome to our guides](https://docs.lerian.studio/en/start-here/welcome-to-our-guides.md): Navigate the Lerian documentation, one tab per area of the platform, from the fundamentals to the products, the Brazil rails, the integration diagrams, and the API reference. - [Getting started](https://docs.lerian.studio/en/start-here/getting-started.md): Begin with Lerian: evaluate the platform, choose a deployment model, and run your first double-entry transaction with Midaz. - [Glossary](https://docs.lerian.studio/en/start-here/glossary.md): Key financial, ledger, and platform terms explained for non-technical audiences, a quick reference for language used across Lerian and Midaz docs. ### Fundamentals #### Introduction - [Where to start](https://docs.lerian.studio/en/start-here/fundamentals/introduction.md): A quick map of the Fundamentals section of Start Here: two plain-language series, Core Banking and Accounting, and which one to read first. #### Accounting ##### The foundations - [What is accounting?](https://docs.lerian.studio/en/start-here/fundamentals/accounting/what-is-accounting.md): The core idea behind accounting: a trustworthy record of money in, money out, and what a business owns versus what it owes. - [Why accounting matters?](https://docs.lerian.studio/en/start-here/fundamentals/accounting/why-accounting-matters.md): The "so what?" for builders: why double-entry is a system requirement, what balancing does and does not guarantee, and why financial systems rely on it. ##### The core concepts - [Assets, liabilities & equity](https://docs.lerian.studio/en/start-here/fundamentals/accounting/assets-liabilities-equity.md): The accounting equation explained with everyday analogies: what you own, what you owe, what's yours, and why Assets = Liabilities + Equity always balances. - [Revenue, expenses & costs](https://docs.lerian.studio/en/start-here/fundamentals/accounting/revenue-and-expenses.md): What revenue, expenses, and costs are, told apart in plain language: the words that drive the Income Statement and why the difference matters. ##### Recording transactions - [Debits and credits](https://docs.lerian.studio/en/start-here/fundamentals/accounting/debits-and-credits.md): What debit and credit mean in a banking system: the two ends of a money movement, and why one balance is a wallet to you and a liability to the ledger. - [Double-entry bookkeeping](https://docs.lerian.studio/en/start-here/fundamentals/accounting/double-entry-bookkeeping.md): Why every transaction touches two accounts so nothing gets lost or invented: the idea behind double-entry bookkeeping, with simple everyday examples. - [Journal entries](https://docs.lerian.studio/en/start-here/fundamentals/accounting/journal-entries.md): How you record a transaction, step by step: from debits and credits to writing it down, with T-accounts and real examples like paying rent. - [Chart of accounts](https://docs.lerian.studio/en/start-here/fundamentals/accounting/chart-of-accounts.md): What a chart of accounts is, why it keeps financial data organized, how it ties accounting together, and how it maps to the account hierarchy in Midaz. ##### Reading the results - [Financial statements](https://docs.lerian.studio/en/start-here/fundamentals/accounting/financial-statements.md): The three reports that summarize a business's money (the Balance Sheet, Income Statement, and Cash Flow Statement) and what each answers, in plain language. - [Accrual vs. cash accounting](https://docs.lerian.studio/en/start-here/fundamentals/accounting/accrual-vs-cash.md): Why revenue isn't always money in the bank and profit isn't the same as cash: the difference between accrual and cash accounting, explained in plain language. ##### Putting it together - [The accounting cycle](https://docs.lerian.studio/en/start-here/fundamentals/accounting/accounting-cycle.md): How transactions, journal entries, the ledger, trial balance, and financial statements fit together as one repeating cycle that keeps the books trustworthy. - [Accounting in Lerian](https://docs.lerian.studio/en/start-here/fundamentals/accounting/accounting-in-lerian.md): How core accounting ideas map onto real Lerian and Midaz entities (accounts, transactions, operations, and routes) so the concepts and the product line up. #### Core Banking ##### The mental model - [What is core banking?](https://docs.lerian.studio/en/start-here/fundamentals/core-banking/what-is-core-banking.md): A plain definition of core banking, what it manages (accounts, balances, transactions), and the five responsibilities we use to explain a modern core system. - [How money is recorded](https://docs.lerian.studio/en/start-here/fundamentals/core-banking/double-entry-explained.md): Why every movement of money has two sides, what debit and credit mean in a ledger, and how double-entry keeps every transaction balanced and auditable. - [The building blocks](https://docs.lerian.studio/en/start-here/fundamentals/core-banking/building-blocks.md): The five core nouns of core banking (Organization, Ledger, Asset, Account, and Balance), each in one sentence, in the order they depend on each other. ##### How money moves and connects - [How money moves](https://docs.lerian.studio/en/start-here/fundamentals/core-banking/how-money-moves.md): What counts as one movement of money, what its parts are called (transactions, operations, and holds), and where money sits before it finally settles. - [Account roles: Holders, Accounts, Aliases & Instruments](https://docs.lerian.studio/en/start-here/fundamentals/core-banking/holders-accounts-aliases.md): Understand the distinct roles of Holders, Ledger Accounts, account aliases, and CRM Instruments in Midaz. - [The outside world](https://docs.lerian.studio/en/start-here/fundamentals/core-banking/external-accounts-and-reconciliation.md): The doorway between your Ledger and the outside world: how external accounts work and how reconciliation proves your records match reality across systems. - [The rules that govern movement](https://docs.lerian.studio/en/start-here/fundamentals/core-banking/routes-and-fees.md): The reusable transaction routes that keep each kind of money movement recorded correctly, and why a fee is just a few more operations on the same journey. ##### Design and get started - [Designing your ledger plan](https://docs.lerian.studio/en/start-here/fundamentals/core-banking/designing-your-ledger-plan.md): How to model your own business as a set of accounts: a simple, worksheet-style method for designing a chart of accounts before you build anything. - [Where to go next](https://docs.lerian.studio/en/start-here/fundamentals/core-banking/where-to-go-next.md): How everything you learned about core banking shows up in Lerian and Midaz, and where to go next to start building, integrating, and running transactions. ### Evaluate & Deploy #### Deployment models - [Lerian Cloud (SaaS) and BYOC](https://docs.lerian.studio/en/start-here/evaluate-and-deploy/deployment-models.md): Understand how Lerian can be deployed, in Lerian Cloud (SaaS) or through BYOC in your own infrastructure, and choose the model that fits your compliance and scale needs. - [Initiating with Enterprise Model](https://docs.lerian.studio/en/start-here/evaluate-and-deploy/initiating-with-enterprise-model.md): Set up Lerian Enterprise in the right order to onboard product, engineering, and ops teams across Midaz, Access Manager, and Reporter. #### Sandbox & licensing - [Before you begin](https://docs.lerian.studio/en/start-here/evaluate-and-deploy/getting-started.md): Review the sandbox, Try It, and licensing pages before integrating with Lerian APIs so you know how to authenticate, test, and access each product. - [Using our Sandbox](https://docs.lerian.studio/en/start-here/evaluate-and-deploy/using-our-sandbox.md): An isolated Lerian environment that mirrors production behavior and powers the Try It experience inside the documentation for safe hands-on API testing. - [Using the Try It feature](https://docs.lerian.studio/en/start-here/evaluate-and-deploy/using-try-it.md): Send live requests directly from the documentation with real API responses in a controlled environment, with no local setup required. - [Lerian's License](https://docs.lerian.studio/en/start-here/evaluate-and-deploy/lerians-license.md): Lerian licenses authorize access to paid products and plugins with organization-scoped and global license types, plus activation and validation rules. ### About Lerian #### About Lerian - [Why Lerian](https://docs.lerian.studio/en/start-here/about-lerian/why-lerian.md): Understand how Lerian helps financial institutions modernize core banking without vendor lock-in: modular products and flexible deployment. - [Who we are](https://docs.lerian.studio/en/start-here/about-lerian/who-we-are.md): Learn about Lerian's mission, identity, and the principles that guide our approach to modern, open financial infrastructure and core banking software. - [Our values](https://docs.lerian.studio/en/start-here/about-lerian/our-values.md): Learn Lerian's mission and the values that guide our work: strength, courage, integrity, audacity, and leadership in financial infrastructure. - [Core Banking vision](https://docs.lerian.studio/en/start-here/about-lerian/core-banking-vision.md): Understand Lerian's vision for modern core banking, structured around four pillars: Ledger, transactional services, governance, and connectivity. #### Release cycle - [Our release cycle](https://docs.lerian.studio/en/start-here/about-lerian/release-cycle.md): Understand how Lerian plans, builds, tests, and releases, from continuous weekly delivery to production releases, so teams know what to expect. - [2025 release schedule](https://docs.lerian.studio/en/start-here/about-lerian/release-cycle-2025.md): Track Lerian's 2025 release cycles with the planned start and end dates for each stage so you can align your delivery and rollouts. - [Our release schedule](https://docs.lerian.studio/en/start-here/about-lerian/release-schedule.md): Track Lerian's release schedules, organized by year. #### Versioning policy - [Our versioning strategy](https://docs.lerian.studio/en/start-here/about-lerian/versions.md): Understand Lerian's versioning strategy: increments, pre-release tags, automation, upgrade paths, and how changes are communicated. - [Versioning scheme](https://docs.lerian.studio/en/start-here/about-lerian/versioning-scheme.md): Learn how Lerian applies semantic versioning, how we manage breaking changes, and how to interpret release candidate designations used for pre-release builds. - [Versioning process](https://docs.lerian.studio/en/start-here/about-lerian/versioning-process.md): Understand how versioning works in Lerian: what to expect between releases, how semantic versioning is automated, and how to plan upgrades across majors. - [Version governance](https://docs.lerian.studio/en/start-here/about-lerian/versioning-governance.md): Understand Lerian's versioning governance: how changes are communicated, how dependencies stay compatible, and our backward-compatibility promise. ## Integration Diagrams ### Introduction - [Integration diagrams](https://docs.lerian.studio/en/diagrams/introduction.md): Sequence diagrams that show how messages, Lerian products and market infrastructures combine into a business journey. - [Message index](https://docs.lerian.studio/en/diagrams/message-index.md): Every message code used in the integration diagrams and the journeys where it appears. ### Lerian Products #### Overview - [Lerian product journeys](https://docs.lerian.studio/en/diagrams/lerian-products/overview.md): Journeys that combine Lerian products, such as Midaz and Tracer, into one business flow. #### Midaz - [Create accounts and transact in Midaz](https://docs.lerian.studio/en/diagrams/lerian-products/midaz-create-and-transact.md): From organization and ledger to a posted transaction in Midaz. #### Tracer - [Validate a transaction before the ledger](https://docs.lerian.studio/en/diagrams/lerian-products/tracer-validate-before-ledger.md): How Tracer evaluates a transaction and returns ALLOW, DENY or REVIEW before Midaz posts it. ### Native rails #### Overview - [Native rail journeys](https://docs.lerian.studio/en/diagrams/native-rails/overview.md): Business journeys that run on Lerian's native messaging with BACEN and Núclea, and the rule that the regulator's manuals prevail. #### Secured credit - [Register receivables as collateral](https://docs.lerian.studio/en/diagrams/native-rails/register-receivables-collateral.md): How a contract effect on card receivables is registered, and how the settlement reaches your institution through Lerian. - [Receive card receivables at the domicile](https://docs.lerian.studio/en/diagrams/native-rails/receive-receivables-at-domicile.md): How a card receivable is paid into the borrower's account at your institution through the SLC cycle and Lerian. - [Settle anticipated receivables in real time](https://docs.lerian.studio/en/diagrams/native-rails/settle-anticipated-receivables.md): How a receivable that the acquirer anticipated is settled one operation at a time, outside the net cycle, through Lerian. - [Collect trade bills and boletos](https://docs.lerian.studio/en/diagrams/native-rails/collect-trade-bills-and-boletos.md): How the payment of a boleto linked to a trade bill reaches your institution through the SILOC collection cycle and Lerian. #### Payments - [Send and receive Pix](https://docs.lerian.studio/en/diagrams/native-rails/send-and-receive-pix.md): A Pix payment from your institution through SPI, with Lerian SPI and Pix Lerian. - [Send and receive TED](https://docs.lerian.studio/en/diagrams/native-rails/send-and-receive-ted.md): A TED transfer from your institution through STR, with Lerian SPB and TED Lerian. #### Settlement and daily operation - [Pay the net debit position](https://docs.lerian.studio/en/diagrams/native-rails/pay-the-net-debit-position.md): How a settlement bank pays its net debit in the multilateral SLC cycle through Lerian. - [Recalculate after a default](https://docs.lerian.studio/en/diagrams/native-rails/recalculate-after-a-default.md): What happens in the SLC cycle, and through Lerian, when a participant with a net debit does not pay in full. - [Settle within the same bank](https://docs.lerian.studio/en/diagrams/native-rails/settle-within-the-same-bank.md): How Núclea settles an operation when the debtor and the creditor use the same settlement bank, without the STR, and how you answer through Lerian. ### Partner interfaces #### Overview - [Partner interface journeys](https://docs.lerian.studio/en/diagrams/partner-interfaces/overview.md): Payment journeys that run through a partner that connects your institution to the payment networks. #### Pix - [Pix through a partner](https://docs.lerian.studio/en/diagrams/partner-interfaces/pix.md): A Pix payment through a partner interface, with one section per partner. #### TED - [TED through a partner](https://docs.lerian.studio/en/diagrams/partner-interfaces/ted.md): A TED transfer through a partner interface. #### Bills and payments - [Bills and payments through a partner](https://docs.lerian.studio/en/diagrams/partner-interfaces/bills-and-payments.md): Paying boletos and utility bills through a partner interface. ### Market infrastructures #### Overview - [Market infrastructure journeys](https://docs.lerian.studio/en/diagrams/market-infrastructures/overview.md): Treasury and securities journeys in Selic and B3, which are not Lerian products, and the rule that their manuals prevail. #### Treasury and liquidity - [Buy and sell federal bonds](https://docs.lerian.studio/en/diagrams/market-infrastructures/buy-and-sell-federal-bonds.md): How an outright trade in federal government bonds settles in Selic, cash through STR first and custody after. - [Repurchase agreements](https://docs.lerian.studio/en/diagrams/market-infrastructures/repurchase-agreements.md): How a repo runs its start and return legs in Selic and in B3. - [Buy bonds in a public offering](https://docs.lerian.studio/en/diagrams/market-infrastructures/public-offerings.md): How a winning bid in a federal bond auction settles in Selic. - [Liquidity and rediscount](https://docs.lerian.studio/en/diagrams/market-infrastructures/liquidity-and-rediscount.md): How an eligible institution gets and repays liquidity in its PI account, and how a rediscount reaches Selic. #### Private securities and funds - [Issue and place fixed income](https://docs.lerian.studio/en/diagrams/market-infrastructures/issue-and-place-fixed-income.md): How an instrument is registered, issued and placed with investors in B3. - [Buy and sell private securities](https://docs.lerian.studio/en/diagrams/market-infrastructures/buy-and-sell-private-securities.md): How an outright trade in a private security registers and settles in B3. - [Interest, amortization and redemption](https://docs.lerian.studio/en/diagrams/market-infrastructures/payment-events.md): How interest, amortization, maturity and redemption reach the holder in Selic and in B3. - [Subscribe and redeem fund quotas](https://docs.lerian.studio/en/diagrams/market-infrastructures/fund-quotas.md): How a subscription or redemption in an open-ended fund registers, gets confirmed and settles in B3. - [Transfer custody and pledge collateral](https://docs.lerian.studio/en/diagrams/market-infrastructures/custody-transfer-and-collateral.md): How securities move between accounts without payment, and how they are linked or blocked as collateral, in Selic and in B3. #### Settlement and operation - [Financial settlement paths](https://docs.lerian.studio/en/diagrams/market-infrastructures/financial-settlement-paths.md): The gross and multilateral paths that move the cash of a B3 operation through STR, and how Selic settles cash. - [Cancel, refund and recover](https://docs.lerian.studio/en/diagrams/market-infrastructures/cancel-return-and-recover.md): How to recover a lost response, cancel an operation and receive a refund in B3. - [Position and reconciliation](https://docs.lerian.studio/en/diagrams/market-infrastructures/position-and-reconciliation.md): The B3 queries and notices that let your institution reconcile operations, positions and cash. ## News ### Introduction - [News overview](https://docs.lerian.studio/en/news/news.md): Latest updates to Lerian products, documentation, and APIs, with release cadence, impact definitions, product filters, and links to the full archive. - [Latest news](https://docs.lerian.studio/en/news/latest-news.md) ### 2026 - [October 2026](https://docs.lerian.studio/en/news/2026/2026-10.md): Documentation updates published in October 2026, grouped by required customer action. - [September 2026](https://docs.lerian.studio/en/news/2026/2026-09.md): Documentation updates published in September 2026, grouped by required customer action. - [August 2026](https://docs.lerian.studio/en/news/2026/2026-08.md): Documentation updates published in August 2026 for Matcher, Flowker, Pix, Lerian Console, and Platform, grouped by required customer action. - [July 2026](https://docs.lerian.studio/en/news/2026/2026-07.md): Documentation updates and release notes published in July 2026 for Midaz, plugins, and platform tools, grouped by required customer action. - [June 2026](https://docs.lerian.studio/en/news/2026/2026-06.md): Documentation updates and release notes published in June 2026 for Midaz, plugins, and platform tools, grouped by required customer action. - [May 2026](https://docs.lerian.studio/en/news/2026/2026-05.md): Documentation updates and release notes published in May 2026 for Midaz, plugins, and platform tools, grouped by required customer action and product area. - [April 2026](https://docs.lerian.studio/en/news/2026/2026-04.md): Documentation updates and release notes published in April 2026 for Midaz, plugins, and platform tools, grouped by required customer action. - [March 2026](https://docs.lerian.studio/en/news/2026/2026-03.md): Documentation updates and release notes published in March 2026 for Midaz, plugins, and platform tools, grouped by required customer action. - [February 2026](https://docs.lerian.studio/en/news/2026/2026-02.md): Documentation updates and release notes published in February 2026 for Midaz, plugins, and platform tools, grouped by required customer action. - [January 2026](https://docs.lerian.studio/en/news/2026/2026-01.md): Documentation updates and release notes published in January 2026 for Midaz, plugins, and platform tools, grouped by required customer action. ### Archive - [2025 in review](https://docs.lerian.studio/en/news/releases-2025.md): Full archive of Lerian product and documentation release notes published throughout 2025, organized by month with links to each release and update. - [2024 in review](https://docs.lerian.studio/en/news/releases-2024.md): Full archive of Lerian product and documentation release notes published throughout 2024, organized by month with links to each release and update. ## OpenAPI Specs - [ledger](/en/openapi/v3-current/ledger.yaml) - [tracer](/en/openapi/v3-current/tracer.yaml) - [matcher](/en/openapi/v3-current/matcher.yaml) - [flowker](/en/openapi/v3-current/flowker.yaml) - [lender](/en/openapi/v3-current/lender.yaml) - [reporter](/en/openapi/v3-current/reporter.yaml) - [spb](/en/openapi/v3-current/spb.yaml) - [spi](/en/openapi/v3-current/spi.yaml) - [spi-dict](/en/openapi/v3-current/spi-dict.yaml) - [spi-brcode](/en/openapi/v3-current/spi-brcode.yaml) - [spi-core](/en/openapi/v3-current/spi-core.yaml) - [slc](/en/openapi/v3-current/slc.yaml) - [siloc](/en/openapi/v3-current/siloc.yaml) - [sta](/en/openapi/v3-current/sta.yaml) - [sisbajud-mensageria](/en/openapi/v3-current/sisbajud-mensageria.yaml) - [sisbajud-executor](/en/openapi/v3-current/sisbajud-executor.yaml) - [bc-correios](/en/openapi/v3-current/bc-correios.yaml) - [src](/en/openapi/v3-current/src.yaml) - [consignado](/en/openapi/v3-current/consignado.yaml) - [pix-lerian-dict](/en/openapi/v3-current/pix-lerian-dict.yaml) - [pix-lerian-cob](/en/openapi/v3-current/pix-lerian-cob.yaml) - [pix-lerian-spi](/en/openapi/v3-current/pix-lerian-spi.yaml) - [pix-lerian-pixauto](/en/openapi/v3-current/pix-lerian-pixauto.yaml) - [pix](/en/openapi/v3-current/pix.yaml) - [jd-courier](/en/openapi/v3-current/jd-courier.yaml) - [indirect-pix](/en/openapi/v3-current/indirect-pix.yaml) - [ted](/en/openapi/v3-current/ted.yaml) - [payments](/en/openapi/v3-current/payments.yaml) - [AM-auth](/en/openapi/v3-current/AM-auth.yaml) - [AM-identity](/en/openapi/v3-current/AM-identity.yaml) - [streaming-hub](/en/openapi/v3-current/streaming-hub.yaml) - [system-facts](/en/openapi/v3-current/system-facts.yaml) - [systemplane](/en/openapi/v3-current/systemplane.yaml) - [narya](/en/openapi/v3-current/narya.yaml) ## Optional - [GitHub](https://github.com/LerianStudio) - [Community](https://discord.gg/DnhqKwkGv3) > The links below point to documentation indexes. Follow each `/_llms/` index recursively until you reach documentation pages. ## Indexes - [English / Lerian Products (397 pages)](https://docs.lerian.studio/_llms/en/lerian-products.txt): Documentation for English / Lerian Products. - [English / Lerian Products / Midaz (154 pages)](https://docs.lerian.studio/_llms/en/lerian-products/midaz.txt): Documentation for English / Lerian Products / Midaz. - [English / Brazil Rails (155 pages)](https://docs.lerian.studio/_llms/en/brazil-rails.txt): Documentation for English / Brazil Rails. - [English / Brazil Rails / Interfaces (97 pages)](https://docs.lerian.studio/_llms/en/brazil-rails/interfaces.txt): Documentation for English / Brazil Rails / Interfaces. - [English / API Reference (1981 pages)](https://docs.lerian.studio/_llms/en/api-reference.txt): Documentation for English / API Reference. - [English / API Reference / Products (664 pages)](https://docs.lerian.studio/_llms/en/api-reference/products.txt): Documentation for English / API Reference / Products. - [English / API Reference / Products / Midaz (208 pages)](https://docs.lerian.studio/_llms/en/api-reference/products/midaz.txt): Ledger, accounts, transactions, CRM, and fees - [English / API Reference / Products / Matcher (171 pages)](https://docs.lerian.studio/_llms/en/api-reference/products/matcher.txt): Reconciliation, matching rules, and exceptions - [English / API Reference / Products / Lender (130 pages)](https://docs.lerian.studio/_llms/en/api-reference/products/lender.txt): Loan products, applications, and servicing - [English / API Reference / Brazil Rails (647 pages)](https://docs.lerian.studio/_llms/en/api-reference/brazil-rails.txt): Documentation for English / API Reference / Brazil Rails. - [English / API Reference / Brazil Rails / SPB (TED) (89 pages)](https://docs.lerian.studio/_llms/en/api-reference/brazil-rails/spb-ted.txt): TED messaging with BACEN over the SPB rail - [English / API Reference / Brazil Rails / SPI (Pix) (187 pages)](https://docs.lerian.studio/_llms/en/api-reference/brazil-rails/spi-pix.txt): Pix messaging with BACEN over the SPI rail - [English / API Reference / Brazil Rails / SLC (69 pages)](https://docs.lerian.studio/_llms/en/api-reference/brazil-rails/slc.txt): Card settlement messaging over the SLC rail - [English / API Reference / Brazil Rails / SILOC (117 pages)](https://docs.lerian.studio/_llms/en/api-reference/brazil-rails/siloc.txt): Deferred settlement messaging over SILOC - [English / API Reference / Brazil Rails / Consignado CLT (Dataprev) (86 pages)](https://docs.lerian.studio/_llms/en/api-reference/brazil-rails/consignado-clt-dataprev.txt): Payroll loan registration with Dataprev - [English / API Reference / Interfaces (374 pages)](https://docs.lerian.studio/_llms/en/api-reference/interfaces.txt): Documentation for English / API Reference / Interfaces. - [English / API Reference / Interfaces / Pix Lerian (81 pages)](https://docs.lerian.studio/_llms/en/api-reference/interfaces/pix-lerian.txt): Pix application APIs for mock-provider integration and testing - [English / API Reference / Interfaces / Pix JD (113 pages)](https://docs.lerian.studio/_llms/en/api-reference/interfaces/pix-jd.txt): Pix operations through the JD direct interface - 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