Bitcoin Rainbow

Bitcoin Rainbow answers "where does BTC stand?" with a picture, not a verdict.

It plots every daily bitcoin close since 2010 (blockchain.info) on a rainbow growth chart: a trend line fit to the whole history, with nine color bands around it. rainbow_today returns the live price (Coinbase spot), today's line value, the band the price sits in, and how far it sits from the line.

MCP connector

Server URL: https://mcp.thebitcoinrainbow.com/mcp
Login: None
Protocol: MCP 2025-06-18
Instructions: Bitcoin Rainbow explains bitcoin in plain, third-grade English. It has five read-only tools. Call when the user asks where bitcoin's price sits today on the rainbow chart: it returns today's live price (Coinbase spot, printed with its UTC quote time; the tools share one spot quote per minute, and it states the day the price history runs through), the rainbow trend line value for today, which colored band the price sits in and which of the nine bands that is (band 1 is the lowest), that band's dollar range for today, what that band means, how far it sits from the line, in percent, the counted share of all priced days spent in that band (a count of past days, not odds), and a link to the chart picture, drawn from the same live data. It also states the fit behind the line: the regression equation, the window of closes it was fit on, and the fit score (R²). The trend line is a log regression fit to every daily bitcoin close since 2010 (blockchain.info through Oct 29, 2026, then Coinbase — blockchain.info's feed stopped). Call when the user asks about the rainbow chart's past: the highest band the price ever reached and when it first got there, how many of all priced days it spent in each band and outside the ladder, the first and most recent dates in a band and the longest unbroken run there, the furthest it ever sat above or below the line, how long since the last close in the top or bottom band, and today's counted position against that history; it counts past days only, and says so. Call when the user asks where bitcoin sits in its market cycle, or names a classic cycle measure (the Pi Cycle Top pair, the Mayer Multiple, the 200-week average, the halving clock, the Ahr999 index): it prints each measure with its own number and the window behind it, side by side, adds one labeled guest number (the Fear & Greed Index from Alternative.me, source and date attached) when it can be fetched, and closes with a count of how many of the five readings sit below the middle of their own past range. There is no blended score. Call when the user asks what a steady buy would have done, or what DCA means (DCA is dollar-cost averaging: the same amount in on a set rhythm, no matter the price): give an amount per buy and a rhythm (daily, weekly, or monthly) and either a span of 1, 3, or 5 years or an exact start date (an end date is optional); it replays those buys on the real price history and returns what would have gone in, what it would be worth today, the gain or loss against what went in, how many buys there were, the dates the buys ran and the weekday weekly buys land on, the average cost per bitcoin, the day the price history ends (a buy scheduled after that day is priced at the last close), and a note on fees: none counted unless a fee_percentage is given, which takes that percent out of each buy; the buys are priced at the daily closes (blockchain.info through Oct 29, 2026, then Coinbase) and today's value at the Coinbase spot price, quoted with its UTC time from the same shared quote prints. That is the past, never a promise or a prediction. Call whenever the user asks for an explanation of anything about bitcoin — explain, ELI5, 'like I'm five', 'what is', 'what does it mean', 'in plain words', a beginner asking — with topic price, technical, fundamental, rainbow, or ways_to_buy; it returns short plain-English text, the same wording the website shows; its price and rainbow topics print that same shared spot quote with its UTC time. This server only describes. It describes where the price sits in its own history; it is not a forecast. It never gives financial advice, never says buy or sell, and never guesses future prices. Keep answers to what the tools return.

Tools

Reads data5

Skills

None in the store listings or on the server

MCP connector

Server URL

https://mcp.thebitcoinrainbow.com/mcp

None

Protocol

MCP 2025-06-18

Instructions

Bitcoin Rainbow explains bitcoin in plain, third-grade English. It has five read-only tools. Call when the user asks where bitcoin's price sits today on the rainbow chart: it returns today's live price (Coinbase spot, printed with its UTC quote time; the tools share one spot quote per minute, and it states the day the price history runs through), the rainbow trend line value for today, which colored band the price sits in and which of the nine bands that is (band 1 is the lowest), that band's dollar range for today, what that band means, how far it sits from the line, in percent, the counted share of all priced days spent in that band (a count of past days, not odds), and a link to the chart picture, drawn from the same live data. It also states the fit behind the line: the regression equation, the window of closes it was fit on, and the fit score (R²). The trend line is a log regression fit to every daily bitcoin close since 2010 (blockchain.info through Oct 29, 2026, then Coinbase — blockchain.info's feed stopped). Call when the user asks about the rainbow chart's past: the highest band the price ever reached and when it first got there, how many of all priced days it spent in each band and outside the ladder, the first and most recent dates in a band and the longest unbroken run there, the furthest it ever sat above or below the line, how long since the last close in the top or bottom band, and today's counted position against that history; it counts past days only, and says so. Call when the user asks where bitcoin sits in its market cycle, or names a classic cycle measure (the Pi Cycle Top pair, the Mayer Multiple, the 200-week average, the halving clock, the Ahr999 index): it prints each measure with its own number and the window behind it, side by side, adds one labeled guest number (the Fear & Greed Index from Alternative.me, source and date attached) when it can be fetched, and closes with a count of how many of the five readings sit below the middle of their own past range. There is no blended score. Call when the user asks what a steady buy would have done, or what DCA means (DCA is dollar-cost averaging: the same amount in on a set rhythm, no matter the price): give an amount per buy and a rhythm (daily, weekly, or monthly) and either a span of 1, 3, or 5 years or an exact start date (an end date is optional); it replays those buys on the real price history and returns what would have gone in, what it would be worth today, the gain or loss against what went in, how many buys there were, the dates the buys ran and the weekday weekly buys land on, the average cost per bitcoin, the day the price history ends (a buy scheduled after that day is priced at the last close), and a note on fees: none counted unless a fee_percentage is given, which takes that percent out of each buy; the buys are priced at the daily closes (blockchain.info through Oct 29, 2026, then Coinbase) and today's value at the Coinbase spot price, quoted with its UTC time from the same shared quote prints. That is the past, never a promise or a prediction. Call whenever the user asks for an explanation of anything about bitcoin — explain, ELI5, 'like I'm five', 'what is', 'what does it mean', 'in plain words', a beginner asking — with topic price, technical, fundamental, rainbow, or ways_to_buy; it returns short plain-English text, the same wording the website shows; its price and rainbow topics print that same shared spot quote with its UTC time. This server only describes. It describes where the price sits in its own history; it is not a forecast. It never gives financial advice, never says buy or sell, and never guesses future prices. Keep answers to what the tools return.