> ## Documentation Index > Fetch the complete documentation index at: https://docs.terrapinfinance.com/llms.txt > Use this file to discover all available pages before exploring further. # Inflation Factors > Retrieve inflation factors for a given country and date range. Inflation factors are used to adjust principal and coupon payments of inflation-linked bonds to account for changes in the price level. ## OpenAPI ````yaml post /api/v1/inflation_factors openapi: 3.0.0 info: title: Terrapin API version: 1.0.0 servers: - url: https://terrapinfinance.com variables: {} security: - authorization: [] tags: [] paths: /api/v1/inflation_factors: post: tags: [] summary: Inflation factors description: |- Retrieve inflation factors for a given country and date range. Inflation factors are used to adjust principal and coupon payments of inflation-linked bonds to account for changes in the price level. operationId: inflation_factors parameters: [] requestBody: content: application/json: example: country: DE end_date: '2025-06-01' start_date: '2025-06-01' schema: additionalProperties: false properties: country: description: > ISO 3166-1 alpha-2 country code (2-letter code) of the country of issue for government bonds. enum: - DE - ES - FR - IT - UK - US nullable: false type: string x-struct: null x-validate: null end_date: description: >- The maximum date (inclusive) for which to return inflation factors, in ISO-8601 format (YYYY-MM-DD). When not set, defaults to the latest available inflation factor date. format: date type: string x-check: end_date_gte_start_date x-check-error: end_date must be greater than or equal to start_date x-struct: null x-validate: null start_date: description: >- The minimum date (inclusive) for which to return inflation factors, in ISO-8601 format (YYYY-MM-DD). When not set, defaults to the earliest available inflation factor date. format: date type: string x-struct: null x-validate: null required: - country type: object x-struct: null x-validate: null required: true responses: '200': content: application/json: example: data: - date: '2025-06-01' factor: 127.43 type: Eurostat total: 1 schema: additionalProperties: false properties: data: description: List of response data objects, often capped to 1000. items: additionalProperties: false properties: date: description: >- Date for inflation factor in ISO-8601 format (YYYY-MM-DD): example: '2025-06-01' format: date nullable: false type: string x-struct: null x-validate: null factor: description: >- Inflation factor value representing the cumulative price level adjustment. example: 127.43 nullable: false type: number x-struct: null x-validate: null type: description: >- The benchmark source for the inflation factor (e.g., Eurostat, ONS, BLS). example: Eurostat nullable: false type: string x-struct: null x-validate: null required: - date - factor - type type: object x-struct: null x-validate: null type: array x-struct: null x-validate: null total: description: >- Total number of results in the database that match the query filters. type: integer x-struct: null x-validate: null required: - data - total title: InflationFactorsResponse type: object x-struct: null x-validate: null description: Inflation factors '401': content: application/json: schema: additionalProperties: false properties: errors: items: additionalProperties: false properties: detail: example: Unauthorized type: string x-struct: null x-validate: null reason: example: >- Your account tier does not allow this operation. Contact team@terrapinfinance.com for an upgrade. type: string x-struct: null x-validate: null required: - detail type: object x-struct: null x-validate: null type: array x-struct: null x-validate: null required: - errors type: object x-struct: null x-validate: null description: Unauthorized '402': content: application/json: schema: additionalProperties: false properties: errors: items: additionalProperties: false properties: detail: example: Payment Required type: string x-struct: null x-validate: null reason: example: >- You have run out of your granted quota for this resource as defined by your account tier. Contact team@terrapinfinance.com for an upgrade. type: string x-struct: null x-validate: null required: - detail type: object x-struct: null x-validate: null type: array x-struct: null x-validate: null required: - errors type: object x-struct: null x-validate: null description: Payment Required '403': content: application/json: schema: additionalProperties: false properties: errors: items: additionalProperties: false properties: detail: example: Forbidden type: string x-struct: null x-validate: null reason: example: >- Your account tier does not allow this operation. Contact team@terrapinfinance.com for an upgrade. type: string x-struct: null x-validate: null required: - detail type: object x-struct: null x-validate: null type: array x-struct: null x-validate: null required: - errors type: object x-struct: null x-validate: null description: Forbidden '422': content: application/json: schema: properties: errors: items: properties: detail: example: 'Invalid string. Got: integer' type: string x-struct: null x-validate: null source: properties: pointer: example: /isins/0 type: string x-struct: null x-validate: null required: - pointer type: object x-struct: null x-validate: null title: example: Invalid value type: string x-struct: null x-validate: null required: - detail - source - title type: object x-struct: null x-validate: null type: array x-struct: null x-validate: null required: - errors type: object x-struct: null x-validate: null description: Unprocessable Entity '429': content: application/json: schema: additionalProperties: false properties: errors: items: additionalProperties: false properties: detail: example: Too Many Requests type: string x-struct: null x-validate: null reason: type: string x-struct: null x-validate: null required: - detail type: object x-struct: null x-validate: null type: array x-struct: null x-validate: null required: - errors type: object x-struct: null x-validate: null description: Too Many Requests '500': content: application/json: schema: additionalProperties: false properties: errors: items: additionalProperties: false properties: detail: example: Internal Server Error type: string x-struct: null x-validate: null reason: type: string x-struct: null x-validate: null required: - detail type: object x-struct: null x-validate: null type: array x-struct: null x-validate: null required: - errors type: object x-struct: null x-validate: null description: Internal Server Error callbacks: {} components: securitySchemes: authorization: scheme: bearer type: http ````