# api.exascale.build — analytics and observability — 2 of 5

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> Probe-verified (tier 2 of 3). Last checked 2026-09-26. 2 of 5 capability checks passed. 2 unknown.

- host: api.exascale.build
- url: https://api.exascale.build/
- category: analytics and observability
- type: business

## Probe-verified · tier 2 of 3

Probed live on 2026-09-26 against rubric v1.2. 2 of 5 checks passed. 2 unknown.

- UNKNOWN — Markdown negotiation (`Accept: text/markdown`)
- UNKNOWN — Markdown twin at a predictable URL (`/page.md`)
- PASS — llms.txt (`/llms.txt`)
- FAIL — API catalog (`RFC 9727`)
- PASS — MCP endpoint answers tools/list (`initialize → tools/list, no credentials`) · on 26 Sep 2026
  - PRESENT — MCP server card (`/.well-known/mcp/server-card.json`): present; its server answers; not scored
  - Platform-supplied: no; not scored
- FAIL — Other agent files at well-known paths (`agent-skills/index.json · oauth-authorization-server · oauth-protected-resource · http-message-signatures-directory`): none found; not scored

MCP tools (from tools/list on 2026-09-26): list_capabilities_v1, get_source_evidence_v1, describe_capability_v1, query_capability_v1, describe_power_capacity_v1, query_power_capacity_v1, describe_power_generation_v1, query_power_generation_v1, describe_power_asset_ownership_v1, query_power_asset_ownership_v1, describe_power_fuel_cost_v1, query_power_fuel_cost_v1, describe_power_plant_costs_v1, query_power_plant_costs_v1, describe_natural_gas_prices_v1, query_natural_gas_prices_v1, describe_power_demand_v1, query_power_demand_v1, describe_power_demand_rollup_v1, query_power_demand_rollup_v1, describe_power_retail_sales_v1, query_power_retail_sales_v1, describe_power_interconnection_queue_v1, query_power_interconnection_queue_v1, describe_power_interconnection_queue_pjm_v1, query_power_interconnection_queue_pjm_v1, describe_power_interconnection_queue_pjm_cycle_v1, query_power_interconnection_queue_pjm_cycle_v1, describe_power_interconnection_queue_caiso_v1, query_power_interconnection_queue_caiso_v1, describe_power_interconnection_queue_nyiso_v1, query_power_interconnection_queue_nyiso_v1, describe_power_interconnection_queue_isone_v1, query_power_interconnection_queue_isone_v1, describe_power_interconnection_queue_ercot_v1, query_power_interconnection_queue_ercot_v1, describe_power_interconnection_queue_spp_v1, query_power_interconnection_queue_spp_v1, describe_power_price_ercot_v1, query_power_price_ercot_v1, describe_power_capacity_accreditation_pjm_v1, query_power_capacity_accreditation_pjm_v1, describe_power_capacity_market_pjm_v1, query_power_capacity_market_pjm_v1, describe_power_capacity_accreditation_miso_v1, query_power_capacity_accreditation_miso_v1, describe_power_capacity_market_miso_v1, query_power_capacity_market_miso_v1, describe_ai_infrastructure_construction_v1, query_ai_infrastructure_construction_v1, describe_ai_infrastructure_trade_v1, query_ai_infrastructure_trade_v1, describe_ai_infrastructure_equipment_trade_v1, query_ai_infrastructure_equipment_trade_v1, describe_ai_infrastructure_production_v1, query_ai_infrastructure_production_v1, describe_robotics_trade_v1, query_robotics_trade_v1, describe_robotics_adoption_v1, query_robotics_adoption_v1, describe_space_satellite_filings_v1, query_space_satellite_filings_v1, describe_capacity_factor_v1, query_capacity_factor_v1

## Summary

API providing verified, source-cited US machine-economy OSINT data including power generation, capacity, ownership, fuel costs, natural gas prices, demand, retail sales, interconnection queues, AI infrastructure, robotics trade and adoption, and FCC satellite filings.

## Context

281 sites in this index share the category "analytics and observability"; 53 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark

How we found this site: probe discovery. This site didn't declare agent access — we found it by checking the open web. Everything above was tested the same way, against the same rubric, on the date shown. [How we choose what to check, and how to opt out](https://knowngood.sh/bot)

## Where this sits

- business: https://knowngood.sh/type/business
- analytics and observability: https://knowngood.sh/category/analytics-observability
- Browse: https://knowngood.sh/browse
- Rubric: https://knowngood.sh/benchmark