> ## Documentation Index > Fetch the complete documentation index at: https://developer.hayinsights.com/llms.txt > Use this file to discover all available pages before exploring further. # Emerging-market FX stress > Emerging-market FX stress monitor — for each tracked pair, compares recent realised volatility against its 90-day distribution and classifies the pair as STABLE, WARNING or PANIC. ## OpenAPI ````yaml /openapi.yaml get /openapi/v1/fx/em-stress openapi: 3.1.0 info: title: HayInsights Open API version: 0.1.0 description: > Programmatic access to the **HayInsights** financial-data hub — commodities, crypto, ETF, FX, macroeconomic and real-estate datasets, served from a single API surface under `/openapi/v1/*`. This specification is the **single source of truth** for the public API surface — shared by SDK codegen, the reference docs, and (later) the mock server / contract tests. ## Authentication Every request must carry your API key in the `X-API-Key` header. There is a single authentication tier — no request signing. Create and manage keys in the HayInsights dashboard (Account → API keys). See **Authentication**. ## Plans & quota Access to each data domain and your request quota are governed by the subscription plan attached to your key. Each endpoint consumes a **weighted** amount of your per-minute quota; every response carries `X-RateLimit-*` headers. See **Rate limits** and **Plans & features**. contact: {} servers: - url: https://api.hayinsights.com description: Production security: - HayInsightsApiKey: [] tags: - name: Commodities description: >- Spot prices, top movers, gold–DXY correlation and historical series for energy, metals and agricultural commodities. - name: Crypto description: >- Crypto market overview, dominance, bubble map, on-chain and derivatives metrics. - name: ETF description: >- Exchange-traded fund listings, performance & net-flow rankings, heatmap, holdings, NAV growth and fund composition. - name: FX description: >- Foreign-exchange summary, live table, 90-day correlation matrix and the emerging-market stress monitor. - name: Macro description: >- Macroeconomic indicators — GDP, CPI/PCE, exchange rates, population, central-government debt and policy rates / bond yields. - name: Real Estate description: >- Real-estate statistics, land prices, administrative geography (provinces / wards) and choropleth GeoJSON, by country. paths: /openapi/v1/fx/em-stress: get: tags: - FX summary: Emerging-market FX stress description: > Emerging-market FX stress monitor — for each tracked pair, compares recent realised volatility against its 90-day distribution and classifies the pair as STABLE, WARNING or PANIC. operationId: fxEmStress responses: '200': description: Emerging-market FX stress readings. content: application/json: schema: $ref: '#/components/schemas/FxEmStressResponse' example: success: true statusCode: 200 data: asOf: '2026-05-14' pairs: - pair: USD/CNY latestPrice: 6.79 vol30d: 1.42 vol90dMean: 2.39 vol90dSd: 0.63 zScore: -1.52 priceZScore: -2 level: WARNING sampleN: 90 - pair: USD/IDR latestPrice: 17500.9 vol30d: 3.95 vol90dMean: 3.56 vol90dSd: 0.37 zScore: 1.02 priceZScore: 2.49 level: WARNING sampleN: 90 meta: timestamp: '2026-06-19T08:50:42.383Z' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '429': $ref: '#/components/responses/RateLimited' '500': $ref: '#/components/responses/InternalError' components: schemas: FxEmStressResponse: allOf: - $ref: '#/components/schemas/EnvelopeBase' - type: object required: - data properties: data: $ref: '#/components/schemas/FxEmStress' EnvelopeBase: type: object description: > Standard success envelope shared by every endpoint. Each operation's response wrapper extends this (via `allOf`) and adds a typed `data` property. required: - success - statusCode properties: success: type: boolean const: true description: Always `true` for a successful response. example: true statusCode: type: integer description: Mirrors the HTTP status code. example: 200 meta: $ref: '#/components/schemas/Meta' FxEmStress: type: object description: Emerging-market FX stress monitor — one entry per tracked currency pair. required: - asOf - pairs properties: asOf: type: - string - 'null' format: date description: Date the readings are as of. example: '2026-05-14' pairs: type: array items: $ref: '#/components/schemas/FxEmStressPair' ErrorBody: type: object description: Standard error envelope returned for every 4xx / 5xx response. required: - success - statusCode - error properties: success: type: boolean const: false description: Always `false` for an error response. example: false statusCode: type: integer description: Mirrors the HTTP status code. example: 401 error: $ref: '#/components/schemas/ErrorDetail' meta: $ref: '#/components/schemas/Meta' Meta: type: object description: >- Response metadata. Always present; `timestamp` is the server time the response was generated. required: - timestamp properties: timestamp: type: string format: date-time description: Server time when the response was generated (ISO 8601). example: '2026-06-19T08:31:59.478Z' additionalProperties: true FxEmStressPair: type: object description: | Emerging-market FX stress reading for a single currency pair — comparing recent realised volatility against its 90-day distribution. required: - pair - latestPrice - vol30d - vol90dMean - vol90dSd - zScore - priceZScore - level - sampleN properties: pair: type: string description: Currency-pair symbol. example: USD/CNY latestPrice: type: - number - 'null' description: Most recent price. example: 6.79 vol30d: type: - number - 'null' description: Annualised 30-day realised volatility (%). example: 1.42 vol90dMean: type: - number - 'null' description: Mean of the 90-day realised-volatility distribution (%). example: 2.39 vol90dSd: type: - number - 'null' description: >- Standard deviation of the 90-day realised-volatility distribution (%). example: 0.63 zScore: type: - number - 'null' description: Z-score of current volatility versus its 90-day distribution. example: -1.52 priceZScore: type: - number - 'null' description: Z-score of the latest price versus its 90-day distribution. example: -2 level: type: string enum: - STABLE - WARNING - PANIC - UNKNOWN description: Stress classification for this pair. example: WARNING sampleN: type: integer description: Number of observations in the sample. example: 90 ErrorDetail: type: object description: Error detail object carried under `error` in the error envelope. required: - code - message properties: code: type: string description: > Machine-readable error code. Specific for authentication / quota errors (e.g. `API_KEY_REQUIRED`, `API_KEY_INVALID`, `FEATURE_NOT_IN_PLAN`, `RATE_LIMIT_EXCEEDED`). For validation (400) and not-found (404) the code is currently `INTERNAL_ERROR` and the HTTP status carries the semantics. example: API_KEY_INVALID message: description: Human-readable message, or a list of validation messages (400). oneOf: - type: string - type: array items: type: string example: Invalid API key responses: Unauthorized: description: >- Missing, invalid, disabled or expired API key. Send a valid key in the `X-API-Key` header. content: application/json: schema: $ref: '#/components/schemas/ErrorBody' example: success: false statusCode: 401 error: code: API_KEY_INVALID message: Invalid API key meta: timestamp: '2026-06-19T08:34:08.023Z' Forbidden: description: >- Your subscription plan does not include this data feature, or your key's scope denies it. content: application/json: schema: $ref: '#/components/schemas/ErrorBody' example: success: false statusCode: 403 error: code: FEATURE_NOT_IN_PLAN message: Your plan does not include this feature meta: timestamp: '2026-06-19T08:34:08.100Z' RateLimited: description: > Rate limit exceeded — you have consumed your plan's per-minute weight budget. Wait until `X-RateLimit-Reset` (or `Retry-After` seconds) then retry. headers: X-RateLimit-Limit: $ref: '#/components/headers/XRateLimitLimit' X-RateLimit-Remaining: $ref: '#/components/headers/XRateLimitRemaining' X-RateLimit-Reset: $ref: '#/components/headers/XRateLimitReset' X-RateLimit-Weight-Used: $ref: '#/components/headers/XRateLimitWeightUsed' Retry-After: $ref: '#/components/headers/RetryAfter' content: application/json: schema: $ref: '#/components/schemas/ErrorBody' example: success: false statusCode: 429 error: code: RATE_LIMIT_EXCEEDED message: Rate limit exceeded meta: timestamp: '2026-06-19T08:34:09.000Z' InternalError: description: Unexpected server error. Retry after a short exponential backoff. content: application/json: schema: $ref: '#/components/schemas/ErrorBody' example: success: false statusCode: 500 error: code: INTERNAL_ERROR message: Internal server error meta: timestamp: '2026-06-19T08:34:10.000Z' headers: XRateLimitLimit: description: Your plan's request-weight budget per 1-minute window. schema: type: integer example: 1000 XRateLimitRemaining: description: Remaining request weight in the current 1-minute window. schema: type: integer example: 997 XRateLimitReset: description: Unix timestamp (seconds) when the current rate-limit window resets. schema: type: integer format: int64 example: 1781857979 XRateLimitWeightUsed: description: Request weight consumed by this call (see each endpoint's weight). schema: type: integer example: 3 RetryAfter: description: Seconds to wait before retrying. Present on 429 responses. schema: type: integer example: 30 securitySchemes: HayInsightsApiKey: type: apiKey in: header name: X-API-Key description: > Your HayInsights API key (prefixed `apk_`). Create and manage keys in the HayInsights dashboard (Account → API keys). Send it in the `X-API-Key` header on **every** request to `/openapi/v1/*`. Which data domains you may access and your request quota are both governed by the subscription plan attached to the key — see the **Plans & features** and **Rate limits** guides. ````