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diff --git a/doc/API.v1.md b/doc/API.v1.md
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+# Cyphernode
+
+## API v1 (RESTful)
+
+### Collections
+
+#### watchedAddresses
+
+| Request | Descripton |
+|---------|------------|
+| `POST /v1/watchedAddresses` | Create new address watch |
+| `GET /v1/watchedAddresses` | Get list of watched addresses |
+| `GET /v1/watchedAddresses/<address>` | Get details of watched address |
+| `DELETE /v1/watchedAddresses/<address>` | Remove watched address |
+
+##### POST /v1/watchedAddresses
+
+**Request body**
+```json
+{
+  "address": <string: address>,
+  "callback": <string: url>
+}
+```
+
+**Response body - 200 - OK**
+```json
+{
+  "id": <int>,
+  "address": <string: address>,
+  "callback": <string: url>",
+  "estimatesmartfee2blocks": <float: bitcoin>,
+  "estimatesmartfee6blocks": <float: bitcoin>,
+  "estimatesmartfee36blocks": <float: bitcoin>,
+  "estimatesmartfee144blocks": <float: bitcoin>
+}
+```
+
+**Response body - 503 - Resource temporarily unavailable**
+```json
+{
+  "reason": <string: reason>
+}
+```
+
+**Response body - 403 - Forbidden**
+```json
+{
+}
+```
+
+##### GET /v1/watchedAddresses
+
+**Response body - 200 - OK**
+```json
+[
+  {
+    "id": <int>,
+    "address": <string: address>,
+    "imported": <bool>,
+    "callback": <string: url>,
+    "watching_since": <datetime: ISO8601-UTC>
+  },
+  ...
+]
+```
+
+**Response body - 503 - Resource temporarily unavailable**
+```json
+{
+  "reason": <string: reason>
+}
+```
+
+**Response body - 403 - Forbidden**
+```json
+{
+}
+```
+
+##### GET /v1/watchedAddresses/<address>
+
+**Response body - 200 - OK**
+```json
+{
+  "id": <int>,
+  "address": <string: address>,
+  "imported": <bool>,
+  "callback": <string: url>,
+  "watching_since": <datetime: ISO8601-UTC>
+}
+```
+
+**Response body - 503 - Resource temporarily unavailable**
+```json
+{
+  "reason": <string: reason>
+}
+```
+
+**Response body - 403 - Forbidden**
+```json
+{
+}
+```
+
+**Response body - 404 - Not found**
+```json
+{
+}
+```
+
+
+##### DELETE /v1/watchedAddresses/<address>
+
+**Response body - 200 - OK**
+```json
+{
+  "address": "<address>",
+  "imported": <bool>,
+  "callback": <string: url>,
+  "watching_since":  <datetime: ISO8601-UTC>
+}
+```
+
+**Response body - 503 - Resource temporarily unavailable**
+```json
+{
+  "reason": <string: reason>
+}
+```
+
+**Response body - 403 - Forbidden**
+```json
+{
+}
+```
+
+**Response body - 404 - Not found**
+```json
+{
+}
+```
+
+##### Asynchronous callbacks
+
+**Request body**
+```json
+{
+  "id": <int> ,
+  "address": <string: address>,
+  "hash": <string: hash>,
+  "vout_n": <int>,
+  "sent_amount": <float: bitcoin>,
+  "confirmations": <int>,
+  "received":  <datetime: ISO8601-UTC>,
+  "size": <int: bytes>,
+  "vsize": <int: bytes>,
+  "fees": <float: bitcoin>,
+  "is_replaceable": <bool>,
+  "blockhash": <string: hash>,
+  "blocktime": <int>,
+  "blockheight": <int>
+}
+```
+
+**Response body - 200 - OK**
+```json
+{
+}
+```
+
+**Response body - 503 - Resource temporarily unavailable**
+```json
+{
+  "reason": <string: reason>
+}
+```
+