Standardized weather, grid, and shipping data and indices, delivered as MCP tools.
Poseidon ingests public data — NOAA/NDBC, NASA POWER, Open-Meteo, EIA-930, USITC HTS, USGS — and serves scored impact indices, forward outlooks, and historical analogs. The same data, published identically to every subscriber, so your agents are grounded instead of guessing.
REST + MCP · API-key protected · Streamable HTTP
We benchmark it. The same questions, asked three ways.
Same model each time, graded against ground truth pulled live from the Poseidon API. Grounding makes agents right; MCP makes them right efficiently.
Without MCP
Base model, no current data — cheap but blind.
1 / 17 correct
Context dump
All feeds stuffed into context — grounded but wasteful.
17 / 17 correct
With Poseidon MCP
Pulls only the slice each question needs — grounded and selective.
17 / 17 correct
accuracy vs. an ungrounded model
Grounding makes agents right.
fewer tokens than stuffing data into context
MCP makes them right, efficiently.
Numbers from benchmarks/results/latest.md — updated each run.
Three data lines. One MCP surface.
Each line is standardized impact data and indices — published identically to all subscribers, never tailored advice.
Commodity weather
Ag desks & commodity quants
Weather-to-commodity impact scores, forward crop outlooks, tariff transmission, and historical analogs.
- Corn, soybeans, wheat, coffee, sugar, orange juice, cocoa — plus natural gas (weather-driven energy demand)
- Standardized impact indices per region × commodity
- Tariff transmission from USITC HTS data
- Historical analogs: "when was it last this dry?"
Grid & energy
Data centers & energy traders
US grid-stress index, grid carbon intensity, cleanest-window forecasts, and flexible-load scheduling data.
- National + per-ISO grid-stress index (EIA-930)
- Carbon intensity now + cleanest-window forecast
- Flexible-load window data for deferrable compute
- 7 US grid ISOs
Global shipping
Logistics & macro desks
A worldwide maritime disruption index across chokepoints and export corridors, plus river-draft signals.
- 24 worldwide chokepoints & export corridors
- Sea-state from Open-Meteo Marine
- River-draft (low-water) signals from USGS gauges
- Suez · Hormuz · Panama · Gulf · Black Sea · more
- commodities
- 8
- crop regions
- ~23
- US grid ISOs
- 7
- shipping lanes
- 24
- weather history back to
- 1981
commodities
crop regions
US grid ISOs
shipping lanes
weather history back to
US · Brazil · Argentina · Black Sea · Australia · Canada · EU
Attach the MCP server. Your agent does the rest.
One command points Claude Code (or any Streamable-HTTP MCP client) at Poseidon. Pick the full union surface, or a focused one by audience.
- Auth is a simple API key:
X-API-KeyorAuthorization: Bearer. - Works with the Claude API MCP connector, Claude Code, or any Streamable-HTTP MCP client.
# Claude Code
claude mcp add --transport http poseidon https://api.poseidonmcp.com/mcp \
--header "X-API-Key: psk_..."
# Focused surfaces by audience:
# https://api.poseidonmcp.com/mcp/commodity (weather → commodity)
# https://api.poseidonmcp.com/mcp/grid (grid & energy)Real questions, answered from current data.
Phrase it naturally. The agent picks the right tool and pulls only the slice it needs.
What is the weather about to do to the US corn crop in Iowa?
/mcp/commodityWhen was Mato Grosso last this dry, and how did soybean prices move after?
/mcp/commodityWhen is California's grid cleanest to run flexible compute over the next day?
/mcp/gridWhich US grid has the lowest-carbon power right now?
/mcp/gridIs Argentina's soybean export chain at risk — sea conditions and river draft?
/mcp/shippingHow stressed is the Texas (ERCOT) grid at the moment?
/mcp/gridStart with an API key.
After checkout you receive a psk_ API key — drop it into the MCP header and your agent is grounded. Same data on every tier; the tier sets how many tool calls you get per day.
Starter
For evaluation and hobby agents. Kick the tires on real data.
MCP tool calls or REST requests, per UTC day
- All three product lines (commodity, grid, shipping)
- MCP + REST access
- Community support
Pro
For production agents and quant dashboards at scale.
MCP tool calls or REST requests, per UTC day
- All MCP surfaces (/mcp, /mcp/commodity, /mcp/grid)
- Historical analogs + forward outlooks
- Webhook alerts on severity crossings
- Priority email support
Enterprise
Custom quota, SLA, and dedicated coverage regions.
MCP tool calls or REST requests, per UTC day
- Custom rate limits & burst headroom
- SLA + uptime guarantees
- Bulk export / data feeds
- Dedicated support & onboarding
Checkout is handled by Stripe. Quota resets daily at 00:00 UTC; track usage live via the X-RateLimit-Remaining header, the get_usage tool, or your dashboard. Standardized data, not investment advice.