HTTP Interfaces and External Systems for Chemical Raw

What Data for This Category Looks Like

Chemical raw material market and yield rate data primarily comes from bulk commodity spot trading platforms, industry association monitoring databases, and futures exchange market interfaces. There are two update schedules: spot quotes update every 1 to 2 hours, and futures contract prices fluctuate in real time during trading days. Individual data documents are returned in structured JSON format, including core fields such as general raw material name, production origin, product specification, latest quote, price change range, and daily trading volume. Field units follow general measurement standards for basic chemical products, such as yuan/ton, ton, with no non-standard units used.

Constraints Imposed on HTTP Interfaces and External Systems

The multi-source nature of chemical raw material data requires interfaces to support multi-data source switching and parameterized filtering, to avoid parsing errors caused by differences in data source fields. Frequently updated market data requires that the interface polling interval matches the data source's update rhythm. An overly short interval increases interface load, while an overly long interval fails to capture the latest yield changes. Structured multi-field data requires that interface requests support specifying returned fields, to reduce invalid data transmission. Additionally, differences in specifications and origins of chemical raw materials lead to quote deviations, so interfaces must support using specifications and origins as filtering parameters to ensure returned data matches business requirements.

Configuration Settings

Configuration Item	Recommended Value	Rationale
`request_interval`	`300 seconds`	Chemical raw material spot data updates every 1 to 2 hours; a 300-second polling interval balances real-time performance and interface load
`return_fields`	`["name","spec","origin","price","change","volume"]`	Matches the core fields of chemical raw material market data, reducing unnecessary data transmission volume
`timeout`	`10 seconds`	Most market interface response times are within 5 seconds; 10 seconds covers common network fluctuations
`filter_params`	`["spec","origin"]`	Chemical raw material quotes depend on product specifications and production origins; parameters must be used to accurately filter target categories
`retry_count`	`2 times`	Addresses occasional temporary fluctuations in market interfaces, reducing the probability of single request failure
`max_parallel`	`5 concurrent requests`	Aligns with the concurrency limit threshold of most bulk commodity market interfaces, avoiding triggering rate limits

The parameter values provided on this page are common recommended starting points for configuration. Actual values are affected by material form, data volume, and business rules. Specific issues require case-by-case analysis, and it is recommended to test on your own samples before finalizing settings.

Three Common Misconfigurations

Issue: Quote fields returned by the interface are empty. Cause: The price field is not specified in return_fields, so the interface filters out fields not explicitly declared by default.
Issue: Requests return a 429 Too Many Requests status code. Cause: A reasonable request_interval and max_parallel are not configured, and concurrent requests exceed the limit threshold of the market interface; this is a similar issue related to interface call frequency limits.
Issue: Request response times out. Cause: The timeout parameter is not set, or its value is too short, failing to adapt to network delays of chemical raw material data sources.

How to Confirm Proper Configuration

Send a test request, check that returned fields include the contents of the configured return_fields list, and verify that field names match business requirements.
Initiate 10 consecutive test requests, observe returned HTTP status codes, confirm no 429 errors occur, and adjust max_parallel and request_interval to a range compliant with interface limits.
View interface request logs, confirm that spec and origin filtering conditions are included in request parameters, matching the currently focused chemical raw material category.
Confirm that the current FastGPT version is V4.9.7 or higher, to ensure support for visually configuring the return_fields and filter_params parameters.
Compare market data manually obtained from data sources with interface return results, and confirm consistency of core values.

Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.