India Data Center Review 2026 — India's most comprehensive infrastructure analysis to support the A.I. era. 250+ pages, 14 chapters, 100+ illustrations, free to download.
Read NowIndia Data Center Review 2026 — India's most comprehensive infrastructure analysis to support the A.I. era. 250+ pages, 14 chapters, 100+ illustrations, free to download.
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ENTERPRISE API · IES TASKFORCE TRACK
The single most-asked question in Indian renewables — is there room at this substation — has not had a clean answer. CTUIL connectivity LOAs, CEA capacity-addition data, STU substation lists, RLDC outage records, and ISTS expansion plans live in different silos. Today the answer comes from a phone call to a friendly engineer at the relevant LDC. Connectivity is now scarcer than land. The ISTS Hosting Capacity Atlas reads every public source, joins them on a substation-by-substation graph, and returns the answer in JSON — built as a TSP-conformant reference implementation under the IES v0.5 substation data model.
WHAT IT DOES
Send a substation ID. Receive available headroom in MW today, queued additions consuming that headroom, and an expected interconnection clearance distribution in months — not a point estimate.
Send a polygon or coordinate, a target capacity, and a technology. Receive a ranked list of candidate substations with headroom, queue depth, distance, terrain class, and district-level open-access economics for the load you'll evacuate against.
Every headroom response carries the expected year-3 curtailment in P50 and P90, sourced from the same dispatch model that powers the Curtailment & Capture-Rate API. The two products share a backbone.
WHY NOW
The ISTS waiver sunset has rewritten the economics of every project on the books. The IES Taskforce v1.0 launch in July 2026 is the single largest opportunity to position substation data on a national standard rather than a vendor format. Every developer is queueing up; every queue is opaque. A buyer who can read the queue clearly is a buyer who stops underwriting projects that cannot evacuate.
SAMPLE
A 220 kV substation near Bhadla, returning 280 MW of headroom today, 150 MW of queued additions, an expected interconnection clearance of 14 to 18 months, and an 8 percent year-3 curtailment forecast.
curl https://api.energymap.in/v1/substations/sub-NRLDC-1023/headroom \
-H 'X-API-Key: $KEY'{
"substation_id": "sub-NRLDC-1023",
"name": "Bhadla 220kV",
"voltage_kv": 220,
"today_headroom_mw": 280,
"queued_mw": 150,
"expected_clearance_months": { "p50": 16, "p90": 22 },
"y3_curtailment": { "p50": 0.08, "p90": 0.14 },
"confidence": 0.83,
"ies_tsp": { "schema_version": "0.5", "conforms": true }
}ENDPOINTS
| Method | Path | Returns |
|---|---|---|
| GET | /v1/substations/{id}/headroom | Headroom, queue, clearance, year-3 curtailment in one call |
| GET | /v1/queue/depth/{region} | Full ranked queue for a region with developer and tech metadata |
| POST | /v1/sites/screen | Ranked substations for a coordinate or polygon and a target capacity |
| GET | /v1/connectivity/forecast/{sub_id} | Probabilistic clearance timeline across the next eight quarters |
| GET | /v1/ists/expansion-plans | CTUIL transmission expansion plan tracker |
WHO IT IS FOR
RE developers
the 40-plus active utility-scale developers building for SECI, state DISCOM, merchant offtake
Replace the phone call to the LDC engineer, multiplied across every site you screen.
Hyperscale data centres
Microsoft · Google · Amazon · Meta · India co-location partners
Counterparty-evacuation diligence on every PPA you sign for an India campus.
Foreign IPPs
Brookfield · Macquarie · EDF Renewables · Iberdrola · Engie
Indian connectivity geography in JSON, not in years of on-the-ground intuition.
State RE policy planners
SERCs and state RE missions
Stop reconciling CTUIL, CEA, and STU views of the same substation by hand.
PPA-signing corporates
Fortune 500 with India operations
Know whether your counterparty's project will evacuate before you commit.
ACCESS
Free tier and paid plans cover this dataset. Limits and what is included on each plan live in one place: energymap.in/pricing. For DISCOM partnerships or custom geographies, email hello@energymap.in.
SOURCE: CTUIL connectivity register + RLDC outages + STU expansion plans + IES Substation TSP · UPDATED hourly · COVERAGE all-India ISTS + major InSTS · METHOD derived
NEXT STEP
The endpoints are on the roadmap and the contract is published. Read the reference, plan your integration, and reserve Enterprise access.