What the data for this category looks like
Thermal coal marketing-related data primarily comes from domestic coastal port spot platforms, origin supervision and statistics systems, and third-party bulk commodity trading interfaces. Full data updates occur once per day, while some real-time transaction data is updated hourly. Most documents use structured JSON or CSV formats. Core fields include origin name, port code, settled unit price (unit: yuan/ton), calorific value (unit: kilocalories/kilogram), port inventory (unit: 10,000 tons), and data release time. Some interfaces include an optional daily price change range field.
What constraints these characteristics impose on HTTP interfaces and external systems
The mixed update rhythms, multi-unit fields, and exclusive authentication rules for thermal coal data create clear constraints for HTTP interface and external system configuration. The combination of daily full updates and hourly real-time updates requires layered pull logic. This avoids bandwidth waste from full pulls and prevents missed real-time data windows. Multi-unit fields must be uniformly mapped during interface parsing to stop unit confusion during downstream marketing content generation. Exclusive authentication interfaces need fine-grained permission restrictions to prevent data leaks or interface interception from cross-category calls. Optional fields require compatible null value handling logic to avoid format errors during content generation.
How to set the configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
HTTP_PULL_INTERVAL | 3600 seconds | Adapts to the hourly update rhythm of thermal coal real-time transaction data, balancing data timeliness and interface call quotas |
UNIFIED_DATA_UNIT | yuan/ton, kilocalories/kilogram | Uniformly maps multi-unit fields returned by interfaces to avoid unit inconsistencies during downstream marketing content generation |
NULL_FIELD_HANDLER | Fill with default prompt text | Compensates for missing optional fields to prevent null value errors during marketing content generation |
API_AUTH_SCOPE | Thermal coal category-only permissions | Matches the authentication rules of industry-exclusive interfaces to avoid interception triggered by cross-category calls |
PARSE_DATA_TIMEOUT | 10 seconds | Adapts to the typical response speed of bulk commodity interfaces to avoid interrupting pull tasks due to timeouts |
INCREMENTAL_PULL_SWITCH | Enabled | Targets mixed update rhythm scenarios to reduce bandwidth and call overhead from repeated pulls |
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 individual analysis, and it is recommended to test on your own samples before finalizing settings.
Three Common Mistakes
- Phenomenon: An external data interface call returns a 401 status code, with an error message containing "token does not have permission to access the target resource". Cause: The API token configured in FastGPT is not restricted to thermal coal-only permissions, triggering authentication interception from the third-party interface.
- Phenomenon: Unit confusion appears in generated marketing content, for example, displaying the settled unit price as "800 kilocalories/kilogram". Cause: No unified data unit mapping is configured, and original unit fields returned by the interface are directly used for content splicing.
- Phenomenon: Scheduled pull tasks return old data or no updated content after triggering. Cause: The incremental pull switch is not enabled, or the pull interval setting does not match the data update rhythm.
How to Verify Configuration Completion
- Call the configured HTTP interface, check if the units of returned fields match the preset unified rules, and confirm that the unit mapping configuration takes effect.
- Simulate optional fields with null values returned by the interface, trigger the content generation process, and check if preset default prompt text is filled in.
- View the running logs of scheduled pull tasks, confirm that the task trigger interval matches the preset configuration, and no frequent current-limiting errors occur.
- Check the authentication configuration of the external system, confirm that only access permissions for the thermal coal category are granted, and no call permissions for other categories are open.
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.