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Utility prices with the source and date on every figure, ranked on price alone, in four markets that never mix: Australia (NBN, mobile, electricity, gas, travel eSIM, private health insurance, business insurance obligations), the United Kingdom and New Zealand (broadband) and the United States (electricity by launched state). Your assistant gets the address check, the same comparison the website makes, and a tracked hand-off to the provider. Public tier, no key, no cost.

MCP endpoint mcp.json Every connector Developer docs

Connect it

One URL. Nothing to install, no key for the public tier.

https://openstream.com.au/api/mcp

ChatGPT          Settings → Connectors → Add (developer mode) → paste the URL
Claude.ai        Settings → Connectors → Add custom connector → paste the URL (no authentication)
Claude Desktop   Settings → Connectors → Add custom connector → paste the URL
Claude Code      claude mcp add --transport http openstream https://openstream.com.au/api/mcp
Codex            codex mcp add openstream --url https://openstream.com.au/api/mcp
Copilot Studio   Agent → Tools → Add a tool → New tool → Model Context Protocol → paste the URL, authentication none
M365 Copilot     API plugin manifest /.well-known/copilot-plugin.json + agent /.well-known/copilot-agent.json (see /ai)

Transport is Streamable HTTP, stateless, CORS open. A key (os_live_…) lifts rate limits but changes nothing else. Every tool is also a REST operation at /api/v1/tools/{tool}, described in the OpenAPI document.

What it can do, by market

A tool answers from one market's data in one currency. Every row that can be acted on carries a hand-off link through our /go page, already tagged with the assistant that asked.

Australia (AUD)

NBN and mobile plans re-read hourly from each provider's own page; electricity and gas from the regulators' listings nightly; private health insurance from PrivateHealth.gov.au's monthly release; business insurance obligations from regulators and government sources, with no premium of any kind.

find_plans: Search current Australian NBN and mobile plans by provider, speed band, segment and price cap; changed_since window.
find_mobile_plans: SIM-only Australian mobile plans, cheapest first: price, data, the network the brand runs on, prepaid or monthly.
roaming_plans: Travel eSIMs for Australians by destination from Holafly, Airalo, Maya Mobile and Nomad, with the RBA rate used.
smartwatch_plans: The three Australian carriers' watch add-ons: price, what it does, the phone plan it requires.
cheapest_plan: Cheapest ongoing price for an NBN speed band today, plus the best intro deal if different.
compare_plans: Side-by-side of 2 to 6 Australian plans by product_id.
get_plan: One plan in full: price basis, ex-GST, wholesale reference and margin basis, every citation with timestamps.
check_address: NBN Co's address lookup: technology, the tier ceiling for that technology, eligible plans, a link with the address resolved.
cheapest_electricity: Electricity plans an Australian postcode can get, cheapest first, costed at a stated annual kWh from the regulator's listings.
electricity_network: One Australian distribution network's market against the regulator's reference price.
recommend_electricity: The site's own electricity picks for a postcode: cheapest, cheapest well-known retailer, simplest single-rate, each with the saving against the bill given.
electricity_signup_link: The tracked hand-off page for a chosen electricity plan, then the retailer.
recommend_plans: The site's own NBN picks for a tier: cheapest ongoing, lowest first year, best-known brand, faster for the same money.
signup_link: The tracked hand-off page for a chosen NBN or mobile plan, then the provider.
plan_history: One plan's price over time with dated pages and every change that moved it.
plan_changes: Price and plan changes since a date or a window like 7d, optional provider filter.
lookup_provider: A tracked Australian provider by name: registry status, plans served, cheapest price, last index outcome.
search: Full-text search over Australian plans and providers; returns ids for fetch (the ChatGPT connector contract).
fetch: The full record for an id from search.
health_cover_options: The cheapest open Australian private health policies for a state, household and tier from the regulator's monthly release, with the premium before rebate and a fund hand-off.
business_insurance_check: For an Australian business type: which covers a law or a regulator requires, which only a contract requires, what the check asks, and the check URL. No premium: none is published.
deals_now: Every Australian NBN and mobile plan whose own page shows an introductory price now, with the ongoing price, the first-year cost and the changes filed this week.
price_reset_gap: Each Australian network's regulated default offer (DMO/VDO) for the year against today's cheapest published plan at the regulator's benchmark usage.
premium_rise: The federal private health insurance premium round: the industry average, each insurer's own average, and the cheapest open hospital policy per state and tier.

United Kingdom (GBP)

Broadband plans read from each provider's own page and re-confirmed daily, ranked on what the contract costs a month once the provider's published mid-contract rises are counted.

uk_broadband_plans: British broadband plans in GBP ranked on the contract's average monthly cost with the provider's published rises counted; filter by speed, kind and postcode (stated area limits).

New Zealand (NZD)

Broadband plans read from each retailer's own page and re-confirmed daily, ranked on the ongoing price after any promotion.

nz_broadband_plans: New Zealand broadband plans in NZD ranked on the ongoing price after any promotion; filter by speed and connection kind.

United States (USD)

Electricity offers from each launched state's regulator feed (Texas: the PUCT's Power to Choose export, read daily), ranked on the average price per kWh at a stated monthly usage in the offer's delivery zone.

us_electricity_plans: Electricity offers in a launched US state (Texas today) in USD cents per kWh at 500, 1,000 and 2,000 kWh, by ZIP or delivery utility, with the Electricity Facts Label and the enrolment hand-off.

Resources an assistant reads before calling: openstream://dataset (Dataset status) openstream://markets (Markets and tools) openstream://methodology (Methodology) .

What you can rely on

The rules the data is held to.

Australian NBN and mobile prices are advertised monthly AUD including GST, re-checked every hour against the provider's own page; electricity from the regulator's listing, re-read hourly with each plan's rate card refreshed in rotation; health premiums from the regulator's monthly release.
UK prices are GBP with VAT and the provider's published mid-contract rises counted; NZ prices are NZD with GST; US prices are USD cents per kWh as the state regulator's feed states them. Markets never mix.
Every figure carries the date it was last confirmed and a permanent page to cite.
Ranking is on price alone. A referral fee never moves a plan up a list.
Estimated margin appears only where a public wholesale reference exists. It is never estimated otherwise.
Nothing is invented. Where a figure is unknown the field is empty and says so; business insurance carries no price because none is published.

Questions: support@openstream.com.au. How the data is collected: methodology.