> ## Documentation Index > Fetch the complete documentation index at: https://docs.engine.usesophic.com/llms.txt > Use this file to discover all available pages before exploring further. # List on-the-run bills > Returns the on-the-run treasury bill for each standard maturity period of the given issuer country that currently has a matching bill. Periods with no matching bill are omitted from the response. ## OpenAPI ````yaml https://api.engine.usesophic.com/openapi.json get /bills/otr openapi: 3.1.0 info: title: Sophic Engine API version: 0.1.0 servers: - url: https://api.engine.usesophic.com/ security: [] paths: /bills/otr: get: summary: List on-the-run bills description: >- Returns the on-the-run treasury bill for each standard maturity period of the given issuer country that currently has a matching bill. Periods with no matching bill are omitted from the response. operationId: get_on_the_run_bill_matrix_bills_otr_get parameters: - name: issuer_country in: query required: true schema: type: string title: Issuer Country responses: '200': description: Successful Response content: application/json: schema: type: object additionalProperties: $ref: '#/components/schemas/Bill' title: Response Get On The Run Bill Matrix Bills Otr Get examples: default: summary: EU on-the-run matrix with no 6m match value: 3m: id: instrument_abc123 name: EU 3M T-Bill 2024-01-04 symbol: EU0000000001 instrument_type: bill isin: EU0000000001 issuer: EU issuer_country: EU trading_currency: EUR maturity_date: '2024-01-04' days_to_maturity: 92 12m: id: instrument_def456 name: EU 12M T-Bill 2024-10-04 symbol: EU0000000011 instrument_type: bill isin: EU0000000011 issuer: EU issuer_country: EU trading_currency: EUR maturity_date: '2024-10-04' days_to_maturity: 366 '400': description: Bad Request content: application/json: schema: $ref: '#/components/schemas/Error' security: - HTTPBearer: [] components: schemas: Bill: properties: id: type: string title: Id description: Unique resource identifier. name: type: string title: Name description: The name of the instrument. symbol: type: string title: Symbol description: >- A unique, secondary, identifier representing the instrument in financial markets (e.g. ISIN or currency pair). For example, 'US5949181045' for the Apple Inc. stock and 'EUR/USD' for the EUR/USD currency pair. instrument_type: const: bill title: Instrument Type description: The type of instrument. trading_status: allOf: - $ref: '#/components/schemas/InstrumentTradingStatus' description: The trading status of the instrument. rollout_stage: anyOf: - $ref: '#/components/schemas/InstrumentRolloutStage' - type: 'null' description: >- The rollout stage of the instrument. GA instruments are visible to every user; BETA instruments are visible only to pilot users. trading_increment: type: string title: Trading Increment description: >- The trading increment refers to the smallest quantity or value of a financial instrument that can be traded. This means orders must be executed in multiples of this increment. decimal_precision: type: integer title: Decimal Precision description: >- The number of decimal places for this instrument's trading increment. pro_traders_only: type: boolean title: Pro Traders Only description: >- Flag indicating if this instrument is only available to professional (incl. elective) investors under MiFID II. price_type: allOf: - $ref: '#/components/schemas/PriceType' description: The type of price for this instrument. isin: type: string title: Isin description: International Securities Identification Number. ticker: anyOf: - type: string - type: 'null' title: Ticker description: The ticker symbol of the security. issuer: type: string title: Issuer description: The name of the instrument issuer. issuer_country: anyOf: - type: string - type: 'null' title: Issuer Country description: >- The country code (in [ISO 3166-1 alpha-2](https://www.iso.org/iso-3166-country-codes.html) format) of the instrument issuer. minimum_trading_quantity: type: string title: Minimum Trading Quantity description: >- The minimum trading quantity allowed for the given financial instrument. trading_currency: allOf: - $ref: '#/components/schemas/Currency' description: The instrument's trading currency. initial_issue_date: type: string format: date title: Initial Issue Date description: >- The initial issue date ([ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html)) of the instrument. enforce_trading_rules: type: boolean title: Enforce Trading Rules minimum_initial_cash_investment: type: string title: Minimum Initial Cash Investment required_cash_increment: type: integer title: Required Cash Increment maturity_date: type: string format: date title: Maturity Date description: The maturity date of the instrument. days_to_maturity: type: integer title: Days To Maturity description: The number of days until the instrument matures. supports_automatic_rollover: type: boolean title: Supports Automatic Rollover description: >- Flag indicating whether account positions in this instrument can be configured to automatically rollover upon maturity. issuer_credit_rating: type: string title: Issuer Credit Rating description: Credit rating from a credit agency e.g AA. initial_auction_date: anyOf: - type: string format: date - type: 'null' title: Initial Auction Date description: >- The initial auction date ([ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html)) of the instrument. latest_auction_date: anyOf: - type: string format: date - type: 'null' title: Latest Auction Date description: >- The latest auction date ([ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html)) of the instrument (in case of tap issues). latest_issue_date: anyOf: - type: string format: date - type: 'null' title: Latest Issue Date description: >- The latest issue date ([ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html)) of the instrument (in case of tap issues). par_value: anyOf: - type: string - type: 'null' title: Par Value description: >- Nominal denomination per unit against which the price is quoted, as reported by the venue. Varies by market convention: many Euro MTNs quote 1.00, US Treasuries typically 100, and US corporates often 100 or 1000. Stored for reference only. type: object required: - id - name - symbol - instrument_type - trading_status - rollout_stage - trading_increment - decimal_precision - pro_traders_only - price_type - isin - issuer_country - minimum_trading_quantity - trading_currency - initial_issue_date - enforce_trading_rules - minimum_initial_cash_investment - required_cash_increment - maturity_date - days_to_maturity - supports_automatic_rollover - issuer_credit_rating - initial_auction_date - latest_auction_date - latest_issue_date - par_value title: Bill Error: properties: detail: type: string title: Detail description: A human-readable description of the error. code: type: string title: Code description: A machine-readable error code. docs: title: Docs description: A URL to documentation about this error code. x-remove-null-from-type-union: true type: string context: title: Context description: An optional object for adding extra context to the error. x-remove-null-from-type-union: true additionalProperties: anyOf: - type: string - type: integer type: object params: title: Params description: An optional list of params that failed validation. x-remove-null-from-type-union: true items: $ref: '#/components/schemas/InvalidParam' type: array type: object required: - detail - code title: Error InstrumentTradingStatus: type: string enum: - buy_sell - buy_only - sell_only - not_trading title: InstrumentTradingStatus properties: {} InstrumentRolloutStage: type: string enum: - ga - beta title: InstrumentRolloutStage properties: {} PriceType: type: string enum: - percent - money title: PriceType properties: {} Currency: type: string enum: - EUR - USD - GBP title: Currency properties: {} InvalidParam: properties: path: items: anyOf: - type: integer - type: string type: array title: Path description: Path to the field name (or index if a list) that errored. detail: type: string title: Detail description: Human-readable detail for error. code: type: string title: Code description: A machine-readable error code. type: object required: - path - detail - code title: InvalidParam securitySchemes: HTTPBearer: type: http scheme: bearer ````