diff --git a/beacon_chain/rpc/config_api.nim b/beacon_chain/rpc/config_api.nim
index eabb6037d..65ba7c1c3 100644
--- a/beacon_chain/rpc/config_api.nim
+++ b/beacon_chain/rpc/config_api.nim
@@ -5,11 +5,12 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 import
+  std/strutils,
   json_rpc/[rpcserver, jsonmarshal],
   chronicles,
+  nimcrypto/utils as ncrutils,
   ../beacon_node_common,
-
-  ../spec/datatypes
+  ../spec/[datatypes, digest, presets]
 
 logScope: topics = "configapi"
 
@@ -24,7 +25,78 @@ proc installConfigApiHandlers*(rpcServer: RpcServer, node: BeaconNode) =
     return @[node.chainDag.headState.data.data.fork]
 
   rpcServer.rpc("get_v1_config_spec") do () -> JsonNode:
-    unimplemented()
+    return %{
+      "MAX_COMMITTEES_PER_SLOT": $MAX_COMMITTEES_PER_SLOT,
+      "TARGET_COMMITTEE_SIZE": $TARGET_COMMITTEE_SIZE,
+      "MAX_VALIDATORS_PER_COMMITTEE": $MAX_VALIDATORS_PER_COMMITTEE,
+      "MIN_PER_EPOCH_CHURN_LIMIT": $MIN_PER_EPOCH_CHURN_LIMIT,
+      "CHURN_LIMIT_QUOTIENT": $CHURN_LIMIT_QUOTIENT,
+      "SHUFFLE_ROUND_COUNT": $SHUFFLE_ROUND_COUNT,
+      "MIN_GENESIS_ACTIVE_VALIDATOR_COUNT":
+        $node.config.runtimePreset.MIN_GENESIS_ACTIVE_VALIDATOR_COUNT,
+      "MIN_GENESIS_TIME": $node.config.runtimePreset.MIN_GENESIS_TIME,
+      "HYSTERESIS_QUOTIENT": $HYSTERESIS_QUOTIENT,
+      "HYSTERESIS_DOWNWARD_MULTIPLIER": $HYSTERESIS_DOWNWARD_MULTIPLIER,
+      "HYSTERESIS_UPWARD_MULTIPLIER": $HYSTERESIS_UPWARD_MULTIPLIER,
+      "SAFE_SLOTS_TO_UPDATE_JUSTIFIED": $SAFE_SLOTS_TO_UPDATE_JUSTIFIED,
+      "ETH1_FOLLOW_DISTANCE": $node.config.runtimePreset.ETH1_FOLLOW_DISTANCE,
+      "TARGET_AGGREGATORS_PER_COMMITTEE": $TARGET_AGGREGATORS_PER_COMMITTEE,
+      "RANDOM_SUBNETS_PER_VALIDATOR": $RANDOM_SUBNETS_PER_VALIDATOR,
+      "EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION":
+        $EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION,
+      "SECONDS_PER_ETH1_BLOCK": $SECONDS_PER_ETH1_BLOCK,
+      "DEPOSIT_CHAIN_ID": $DEPOSIT_CHAIN_ID,
+      "DEPOSIT_NETWORK_ID": $DEPOSIT_NETWORK_ID,
+      "DEPOSIT_CONTRACT_ADDRESS": $node.config.depositContractAddress,
+      "MIN_DEPOSIT_AMOUNT": $MIN_DEPOSIT_AMOUNT,
+      "MAX_EFFECTIVE_BALANCE": $MAX_EFFECTIVE_BALANCE,
+      "EJECTION_BALANCE": $EJECTION_BALANCE,
+      "EFFECTIVE_BALANCE_INCREMENT": $EFFECTIVE_BALANCE_INCREMENT,
+      "GENESIS_FORK_VERSION":
+        $node.config.runtimePreset.GENESIS_FORK_VERSION,
+      "BLS_WITHDRAWAL_PREFIX": "0x" & ncrutils.toHex([BLS_WITHDRAWAL_PREFIX]),
+      "GENESIS_DELAY": $node.config.runtimePreset.GENESIS_DELAY,
+      "SECONDS_PER_SLOT": $SECONDS_PER_SLOT,
+      "MIN_ATTESTATION_INCLUSION_DELAY": $MIN_ATTESTATION_INCLUSION_DELAY,
+      "SLOTS_PER_EPOCH": $SLOTS_PER_EPOCH,
+      "MIN_SEED_LOOKAHEAD": $MIN_SEED_LOOKAHEAD,
+      "MAX_SEED_LOOKAHEAD": $MAX_SEED_LOOKAHEAD,
+      "EPOCHS_PER_ETH1_VOTING_PERIOD": $EPOCHS_PER_ETH1_VOTING_PERIOD,
+      "SLOTS_PER_HISTORICAL_ROOT": $SLOTS_PER_HISTORICAL_ROOT,
+      "MIN_VALIDATOR_WITHDRAWABILITY_DELAY":
+        $MIN_VALIDATOR_WITHDRAWABILITY_DELAY,
+      "SHARD_COMMITTEE_PERIOD": $SHARD_COMMITTEE_PERIOD,
+      "MIN_EPOCHS_TO_INACTIVITY_PENALTY": $MIN_EPOCHS_TO_INACTIVITY_PENALTY,
+      "EPOCHS_PER_HISTORICAL_VECTOR": $EPOCHS_PER_HISTORICAL_VECTOR,
+      "EPOCHS_PER_SLASHINGS_VECTOR": $EPOCHS_PER_SLASHINGS_VECTOR,
+      "HISTORICAL_ROOTS_LIMIT": $HISTORICAL_ROOTS_LIMIT,
+      "VALIDATOR_REGISTRY_LIMIT": $VALIDATOR_REGISTRY_LIMIT,
+      "BASE_REWARD_FACTOR": $BASE_REWARD_FACTOR,
+      "WHISTLEBLOWER_REWARD_QUOTIENT": $WHISTLEBLOWER_REWARD_QUOTIENT,
+      "PROPOSER_REWARD_QUOTIENT": $PROPOSER_REWARD_QUOTIENT,
+      "INACTIVITY_PENALTY_QUOTIENT": $INACTIVITY_PENALTY_QUOTIENT,
+      "MIN_SLASHING_PENALTY_QUOTIENT": $MIN_SLASHING_PENALTY_QUOTIENT,
+      "PROPORTIONAL_SLASHING_MULTIPLIER": $PROPORTIONAL_SLASHING_MULTIPLIER,
+      "MAX_PROPOSER_SLASHINGS": $MAX_PROPOSER_SLASHINGS,
+      "MAX_ATTESTER_SLASHINGS": $MAX_ATTESTER_SLASHINGS,
+      "MAX_ATTESTATIONS": $MAX_ATTESTATIONS,
+      "MAX_DEPOSITS": $MAX_DEPOSITS,
+      "MAX_VOLUNTARY_EXITS": $MAX_VOLUNTARY_EXITS,
+      "DOMAIN_BEACON_PROPOSER":
+        "0x" & strutils.toHex(cast[uint64](DOMAIN_BEACON_PROPOSER)),
+      "DOMAIN_BEACON_ATTESTER":
+        "0x" & strutils.toHex(cast[uint64](DOMAIN_BEACON_ATTESTER)),
+      "DOMAIN_RANDAO":
+        "0x" & strutils.toHex(cast[uint64](DOMAIN_RANDAO)),
+      "DOMAIN_DEPOSIT":
+        "0x" & strutils.toHex(cast[uint64](DOMAIN_DEPOSIT)),
+      "DOMAIN_VOLUNTARY_EXIT":
+        "0x" & strutils.toHex(cast[uint64](DOMAIN_VOLUNTARY_EXIT)),
+      "DOMAIN_SELECTION_PROOF":
+        "0x" & strutils.toHex(cast[uint64](DOMAIN_SELECTION_PROOF)),
+      "DOMAIN_AGGREGATE_AND_PROOF":
+        "0x" & strutils.toHex(cast[uint64](DOMAIN_AGGREGATE_AND_PROOF))
+    }
 
   rpcServer.rpc("get_v1_config_deposit_contract") do () -> JsonNode:
     unimplemented()