doc: add missing schema for currencyconvert API.

diff --git a/contrib/msggen/msggen/schema.json b/contrib/msggen/msggen/schema.json
index 9323bed1..dbdd5553 100644
--- a/contrib/msggen/msggen/schema.json
+++ b/contrib/msggen/msggen/schema.json
@@ -7237,6 +7237,62 @@
         }
       ]
     },
+    "currencyconvert.json": {
+      "$schema": "../rpc-schema-draft.json",
+      "type": "object",
+      "rpc": "currencyconvert",
+      "title": "Command to convert a fiat amount into millisatoshis",
+      "added": "v26.04",
+      "description": [
+        "The **currencyconvert** RPC command converts a given amount in a given currency into millisatoshis.",
+        "It uses the median of the available exchange-rate sources for the requested currency."
+      ],
+      "request": {
+        "required": [
+          "amount",
+          "currency"
+        ],
+        "additionalProperties": false,
+        "properties": {
+          "amount": {
+            "type": "number",
+            "description": [
+              "The amount, expressed in the given currency, to convert into millisatoshis."
+            ]
+          },
+          "currency": {
+            "type": "string",
+            "description": [
+              "The ISO-4217 currency code (e.g. USD) to convert from.",
+              "The plugin normalizes this value to uppercase before querying sources."
+            ]
+          }
+        }
+      },
+      "response": {
+        "required": [
+          "msat"
+        ],
+        "additionalProperties": false,
+        "properties": {
+          "msat": {
+            "type": "msat",
+            "description": [
+              "The converted amount in millisatoshis, computed using the median result from the available sources."
+            ]
+          }
+        }
+      },
+      "author": [
+        "daywalker90 is mainly responsible."
+      ],
+      "see_also": [
+        "lightning-currencyrates(7)"
+      ],
+      "resources": [
+        "Main web site: [https://github.com/ElementsProject/lightning](https://github.com/ElementsProject/lightning)"
+      ]
+    },
     "currencyrate.json": {
       "$schema": "../rpc-schema-draft.json",
       "type": "object",
diff --git a/doc/Makefile b/doc/Makefile
index 0e180122..858b366f 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -42,6 +42,7 @@ MARKDOWNPAGES := doc/addgossip.7 \
 	doc/createinvoice.7 \
 	doc/createonion.7 \
 	doc/createrune.7 \
+	doc/currencyconvert.7 \
 	doc/currencyrate.7 \
 	doc/datastore.7 \
 	doc/datastoreusage.7 \
diff --git a/doc/index.rst b/doc/index.rst
index 79baaaf1..ba126b1c 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -50,6 +50,7 @@ Core Lightning Documentation
    createinvoice <createinvoice.7.md>
    createonion <createonion.7.md>
    createrune <createrune.7.md>
+   currencyconvert <currencyconvert.7.md>
    currencyrate <currencyrate.7.md>
    datastore <datastore.7.md>
    datastoreusage <datastoreusage.7.md>
diff --git a/doc/schemas/currencyconvert.json b/doc/schemas/currencyconvert.json
new file mode 100644
index 00000000..bbe780c9
--- /dev/null
+++ b/doc/schemas/currencyconvert.json
@@ -0,0 +1,56 @@
+{
+  "$schema": "../rpc-schema-draft.json",
+  "type": "object",
+  "rpc": "currencyconvert",
+  "title": "Command to convert a fiat amount into millisatoshis",
+  "added": "v26.04",
+  "description": [
+    "The **currencyconvert** RPC command converts a given amount in a given currency into millisatoshis.",
+    "It uses the median of the available exchange-rate sources for the requested currency."
+  ],
+  "request": {
+    "required": [
+      "amount",
+      "currency"
+    ],
+    "additionalProperties": false,
+    "properties": {
+      "amount": {
+        "type": "number",
+        "description": [
+          "The amount, expressed in the given currency, to convert into millisatoshis."
+        ]
+      },
+      "currency": {
+        "type": "string",
+        "description": [
+          "The ISO-4217 currency code (e.g. USD) to convert from.",
+          "The plugin normalizes this value to uppercase before querying sources."
+        ]
+      }
+    }
+  },
+  "response": {
+    "required": [
+      "msat"
+    ],
+    "additionalProperties": false,
+    "properties": {
+      "msat": {
+        "type": "msat",
+        "description": [
+          "The converted amount in millisatoshis, computed using the median result from the available sources."
+        ]
+      }
+    }
+  },
+  "author": [
+    "daywalker90 is mainly responsible."
+  ],
+  "see_also": [
+    "lightning-currencyrates(7)"
+  ],
+  "resources": [
+    "Main web site: [https://github.com/ElementsProject/lightning](https://github.com/ElementsProject/lightning)"
+  ]
+}