diff --git a/README.md b/README.md
index 5da2f38..b3b0265 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # roteiro-agent
 
-MCP (Model Context Protocol) server for [Cairn](https://github.com/i-norden/cairn) — a spatial data platform. Enables AI agents (Claude Desktop, VS Code, Cursor) to work with geospatial datasets, run geoprocessing operations, execute PostGIS queries, and more.
+MCP (Model Context Protocol) server for [Roteiro](roteiro.io) — a spatial data platform. Enables AI agents (Claude Desktop, VS Code, Cursor) to work with geospatial datasets, run geoprocessing operations, execute PostGIS queries, and more.
 
 ## Installation
 
@@ -19,7 +19,7 @@ go build -o roteiro-agent .
 ## Usage
 
 ```bash
-roteiro-agent --server-url http://localhost:8080 --api-key cairn_abc123
+roteiro-agent --server-url http://localhost:8080 --api-key Roteiro_abc123
 ```
 
 The server communicates via JSON-RPC 2.0 over stdio (stdin/stdout), following the MCP specification.
@@ -28,9 +28,9 @@ The server communicates via JSON-RPC 2.0 over stdio (stdin/stdout), following th
 
 | Variable | Flag | Description |
 |----------|------|-------------|
-| `CAIRN_SERVER_URL` | `--server-url` | Cairn server base URL |
-| `CAIRN_API_KEY` | `--api-key` | Cairn API key |
-| `CAIRN_SESSION_COOKIE` | `--session-cookie` | Session cookie (alternative to API key) |
+| `ROTEIRO_SERVER_URL` | `--server-url` | Roteiro server base URL |
+| `ROTEIRO_API_KEY` | `--api-key` | Roteiro API key |
+| `ROTEIRO_SESSION_COOKIE` | `--session-cookie` | Session cookie (alternative to API key) |
 
 ## MCP Client Configuration
 
diff --git a/SKILL.md b/SKILL.md
index 6a9fe17..5efa580 100644
--- a/SKILL.md
+++ b/SKILL.md
@@ -1,8 +1,8 @@
-# Cairn Spatial Platform — Agent Guide
+# Roteiro Spatial Platform — Agent Guide
 
-## What is Cairn?
+## What is Roteiro?
 
-Cairn is a full-featured spatial data platform. It stores, processes, and serves geospatial datasets. Think of it as a self-hosted GIS server with a REST API.
+Roteiro is a full-featured spatial data platform. It stores, processes, and serves geospatial datasets. Think of it as a self-hosted GIS server with a REST API.
 
 ## Authentication
 
@@ -33,7 +33,7 @@ Use `query_features` with:
 
 ### SQL queries
 
-Use `execute_sql` for complex spatial queries. Cairn exposes PostGIS, so all spatial functions are available:
+Use `execute_sql` for complex spatial queries. Roteiro exposes PostGIS, so all spatial functions are available:
 - `ST_Area`, `ST_Length`, `ST_Distance` — measurements
 - `ST_Buffer`, `ST_Intersection`, `ST_Union` — geometry operations
 - `ST_Intersects`, `ST_Contains`, `ST_Within` — spatial predicates
@@ -68,7 +68,7 @@ Use `list_operations` to get the full list with parameter schemas.
 
 ## Data Catalog & STAC
 
-Cairn includes a built-in data catalog and supports importing from remote STAC (SpatioTemporal Asset Catalog) servers.
+Roteiro includes a built-in data catalog and supports importing from remote STAC (SpatioTemporal Asset Catalog) servers.
 
 ### Built-in catalog
 
@@ -84,7 +84,7 @@ For external data sources:
 
 ### Local STAC search
 
-Use `search_stac` to search Cairn's own STAC endpoint with spatial (`bbox`), temporal (`datetime`), collection, and CQL2 (`filter`) criteria.
+Use `search_stac` to search Roteiro's own STAC endpoint with spatial (`bbox`), temporal (`datetime`), collection, and CQL2 (`filter`) criteria.
 
 ## Tips for Effective Use
 
diff --git a/main.go b/main.go
index 55fb2c7..e09f71c 100644
--- a/main.go
+++ b/main.go
@@ -1,5 +1,5 @@
 // roteiro-agent is an MCP (Model Context Protocol) server that exposes
-// Cairn's spatial data platform to AI agents like Claude Desktop, VS Code,
+// Roteiro's spatial data platform to AI agents like Claude Desktop, VS Code,
 // and Cursor.
 //
 // Usage:
@@ -19,8 +19,8 @@ import (
 var version = "dev"
 
 func main() {
-	serverURL := flag.String("server-url", "", "Cairn server base URL (e.g. http://localhost:8080)")
-	apiKey := flag.String("api-key", "", "Cairn API key for authentication")
+	serverURL := flag.String("server-url", "", "Roteiro server base URL (e.g. http://localhost:8080)")
+	apiKey := flag.String("api-key", "", "Roteiro API key for authentication")
 	sessionCookie := flag.String("session-cookie", "", "Session cookie value for authentication (alternative to API key)")
 	showVersion := flag.Bool("version", false, "Print version and exit")
 	flag.Parse()
@@ -32,17 +32,17 @@ func main() {
 
 	if *serverURL == "" {
 		// Fall back to environment variable.
-		*serverURL = os.Getenv("CAIRN_SERVER_URL")
+		*serverURL = os.Getenv("ROTEIRO_SERVER_URL")
 	}
 	if *apiKey == "" {
-		*apiKey = os.Getenv("CAIRN_API_KEY")
+		*apiKey = os.Getenv("ROTEIRO_API_KEY")
 	}
 	if *sessionCookie == "" {
-		*sessionCookie = os.Getenv("CAIRN_SESSION_COOKIE")
+		*sessionCookie = os.Getenv("ROTEIRO_SESSION_COOKIE")
 	}
 
 	if *serverURL == "" {
-		log.Fatal("--server-url or CAIRN_SERVER_URL is required")
+		log.Fatal("--server-url or ROTEIRO_SERVER_URL is required")
 	}
 
 	client := mcp.NewClient(*serverURL, *apiKey)
diff --git a/mcp/client.go b/mcp/client.go
index 12b0d87..b2aa51f 100644
--- a/mcp/client.go
+++ b/mcp/client.go
@@ -1,5 +1,5 @@
 // Package mcp implements an MCP (Model Context Protocol) server that exposes
-// Cairn's spatial data platform to AI agents.
+// Roteiro's spatial data platform to AI agents.
 package mcp
 
 import (
@@ -16,7 +16,7 @@ import (
 	"time"
 )
 
-// Client is a thin HTTP wrapper for the Cairn REST API.
+// Client is a thin HTTP wrapper for the Roteiro REST API.
 type Client struct {
 	BaseURL       string
 	APIKey        string
@@ -272,7 +272,7 @@ func (c *Client) ExecuteSQL(query string) (json.RawMessage, error) {
 		return nil, err
 	}
 	if code == http.StatusNotFound || code == http.StatusMethodNotAllowed {
-		// Backward compatibility for older Cairn deployments.
+		// Backward compatibility for older Roteiro deployments.
 		body, code, err = c.postJSON("/api/sql/query", map[string]string{"sql": query})
 		if err != nil {
 			return nil, err
diff --git a/mcp/server.go b/mcp/server.go
index dc4f5ec..ae13515 100644
--- a/mcp/server.go
+++ b/mcp/server.go
@@ -21,7 +21,7 @@ type Server struct {
 	info   ServerInfo
 }
 
-// NewServer creates a new MCP server backed by the given Cairn API client.
+// NewServer creates a new MCP server backed by the given Roteiro API client.
 func NewServer(client *Client) *Server {
 	return &Server{
 		client: client,
diff --git a/mcp/server_test.go b/mcp/server_test.go
index ea6bc48..041db1c 100644
--- a/mcp/server_test.go
+++ b/mcp/server_test.go
@@ -10,7 +10,7 @@ import (
 	"testing"
 )
 
-// testServer creates a test Cairn API server and returns a connected MCP server.
+// testServer creates a test Roteiro API server and returns a connected MCP server.
 func testServer(t *testing.T, handler http.Handler) *Server {
 	t.Helper()
 	ts := httptest.NewServer(handler)
diff --git a/mcp/tools.go b/mcp/tools.go
index 20448c2..d8b2f5d 100644
--- a/mcp/tools.go
+++ b/mcp/tools.go
@@ -29,7 +29,7 @@ func AllTools() []Tool {
 	return []Tool{
 		{
 			Name:        "list_datasets",
-			Description: "List all datasets registered in Cairn with their names, formats, feature counts, and geometry types.",
+			Description: "List all datasets registered in Roteiro with their names, formats, feature counts, and geometry types.",
 			InputSchema: InputSchema{Type: "object"},
 		},
 		{