diff --git a/README.md b/README.md
index a964a73e..94c3ca85 100644
--- a/README.md
+++ b/README.md
@@ -5,3 +5,88 @@ Structured database for Web3Privacy Now.
 # License
 
 Open Data Commons Open Database License (ODbL)
+
+
+# Schema specification
+
+| Field                  | Type     | Additional Properties | Required | Description |
+|------------------------|----------|------------------------|----------|-------------|
+| type                   | object   | false                  | -        |             |
+| id                     | string   |                        | x        |             |
+| name                   | string   |                        | x        | name of the project            |
+| categories             | array    |                        | x        | defined by web3privacy categories            |
+| ecosystem              | string   |                        |          | Cosmos, Ethereum            |
+| product_readiness      | string   |                        |          |             |
+| security               | string   |                        |          |             |
+| have_token             | boolean  |                        |          |             |
+| token_link             | string   | uri                    |          |             |
+| tokens                 | array    |                        |          |             |
+| description            | string   |                        |          |             |
+| project_type           | string   |                        |          | Lending, Trading, Staking, Yield, Transfer, Payment, Mixer, Data storage            |
+| product_launch_day     | string   |                        |          |             |
+| technology type            | string   |                        |          | ZK, Layer0, STARKS...            |
+| technology name            | string   |                        |          | Ultramixing-protocol            |
+| technology features            | array   |                        |          | Positive (Private, Non-traceble,...) / Negative (Unverifiable)             |
+| links web                  | string   | uri                       |          | infrastructure            |
+| links twitter                  | string   | uri                       | social link         |             |
+| links discord                  | string   | uri                       | social link         |             |
+| links twitter                  | string   | uri                       |          |             |
+| links blog                  | string   | uri                       |          | validation            |
+| links facebook                  | string   | uri                       | social link         |             |
+| links bloc_explorer                  | string   | uri                       |          | infrastructure            |
+| links whitepaper                  | string   | uri                       |          | infrastructure            |
+| links github                  | string   | uri                       |          | infrastructure            |
+| links docs                  | string   | uri                       |          | infrastructure            |
+| links changelog                  | string   | uri                       |          | infrastructure            |
+| links forum                  | string   | uri                       |          | infrastructure            |
+| links snapshot                  | string   | uri                       |          |             |
+| links lens                  | string   | uri                       |          |             |
+| links farcaster                  | string   | uri                       |          |             |
+| links rss_feed                  | string   | uri                       |          |             |
+| blockchain_features p2p   | boolean   |                        |          |             |
+| blockchain_features encryption   | string   |                        |          |             |
+| blockchain_features network   | string   |                        |          |             |
+| blockchain_features upgradability enabled   | boolean   |                        |          |             |
+| blockchain_features upgradability type   | string   |                        |          |             |
+| blockchain_features upgradability admin_keys   | string   |                        |          |             |
+| licenses               | string   |                        |          |             |
+| privacy_policy defined         | boolean   |                        |          |             |
+| privacy_policy link         | string   | uri                       |          |             |
+| privacy_policy data_usage         | string   |                        |          |             |
+| team anonymous                  | boolean   |                        |          |             |
+| team teammembers name                  | string   |                        |          |             |
+| team teammembers role                  | string   |                        |          |             |
+| team teammembers link                  | string   | uri                        |          |             |
+| team company name                  | string   |                        |          |             |
+| team company link                  | string   | uri                       |          |             |
+| team company contacts                  | string   |                        |          |             |
+| storage decentralized               | boolean   |                        |          |             |
+| traceability tracked_data          | string   |                        |          |             |
+| traceability kyc          | boolean   |                        |          |             |
+| traceability sign_in_type_requirments          | string   |                        |          |             |
+| third_party_dependency | string   |                        |          |             |
+| compliance             | string   |                        |          |             |
+| audits name                | string   |                        |          |             |
+| audits company                | string   |                        |          |             |
+| audits logo                | string   |                        |          |             |
+| audits link                | string   | uri                       |          |             |
+| audits time                | string   |                        |          |             |
+| social_trust           | string   |                        |          |             |
+| technical_spof         | string   |                        |          |             |
+| history title                | string   |                        |          |             |
+| history event_type                | string   |                        |          |             |
+| history description                | string   |                        |          |             |
+| history time                | string   |                        |          |             |
+| history link                | string   | uri                       |          |             |
+| client_diversability name  | string   |                        |          |             |
+| client_diversability link  | string   | uri                       |          |             |
+| default_privacy        | boolean  |                        |          |             |
+| funding name               | string   |                        |          |             |
+| funding type               | string   |                        |          |             |
+| funding link               | string   | uri                       |          |             |
+| funding value               | string   |                        |          |             |
+| funding time               | string   |                        |          |             |
+| project_status live_status        | boolean   |                        |          |             |
+| project_status version        | string   |                        |          |             |
+| project_status testnet        | boolean   |                        |          |             |
+| project_status mainnet        | boolean   |                        |          |             |