Discover / api.carbon-cashmere.de

api.carbon-cashmere.de

■ Challenge detected

Curated Bitcoin coinbase scriptSig messages (printable ASCII only). Pool tags, BIP-comment campaigns, political statements. Window up to 7d.

Listed price
$0.02
Challenge detected
9 of the last 9 checks
Median response
465 ms
Last checked
16 Oct, 23:40 UTC
In our index since
26 Sept 2026

Endpoint

curl -i https://api.carbon-cashmere.de/v1/btc-derivatives/coinbase-messages
# 402 Payment Required: pay with an x402 client (USDC on Algorand),
# then send the same request again with the payment attached.
33 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://api.carbon-cashmere.de/v1

  • GET/btc-derivatives/coinbase-messagesNo price listedCurated Bitcoin coinbase scriptSig messages (printable ASCII only). Pool tags, BIP-comment campaigns, political statements. Window up to 7d.
  • GET/kaspa-derivatives/toccata-statusNo price listedKaspa Toccata hardfork tracker: live activation distance, network-measured ETA, post-fork parameter reference. First-mover fork analytics from direct network measurement. Informational research data — not investment advice.
  • GET/kaspa-derivatives/network-hashrateNo price listedKaspa network hashrate (H/s) + difficulty trend from 5-minute snapshots of the public Kaspa node REST observer (api.kaspa.org). Post-fork mining-security telemetry. Informational research data — not investment advice.
  • GET/btc-derivatives/miner-attributionNo price listedBitcoin mining-pool hashrate share derived from coinbase scriptSig parsing. Returns block-count + share % per pool for window (1h/24h/7d/30d), with explicit Unknown bucket for long-tail small pools.
  • GET/kaspa-derivatives/chain-colorNo price listedKaspa blue/red block density (GHOSTDAG): merged (red) vs selected-chain (blue) block share — DAG-stress / orphan-rate proxy. Informational research data — not investment advice.
  • GET/subtensor-derivatives/event-streamNo price listedFiltered Bittensor substrate event stream from finalized blocks. Module/event filters supported. Captures events that disappear from public lite-node APIs.
  • GET/bittensor-derivatives/alpha-pricesNo price listedLatest alpha-token price per Bittensor subnet (TAO + USD). All 129 subnets in one call. AI agent API for cross-subnet price arbitrage, dTAO portfolio rebalancing. Informational research data — not investment advice.
  • GET/kaspa-derivatives/fee-regimeNo price listedKaspa fee-market regime: fee-bucket distribution incl. the sub-floor segment the Toccata minimum displaces. Informational research data — not investment advice.
  • GET/kaspa-derivatives/blocks/:block_hashNo price listedSingle Kaspa block extract with full DAG topology (parents, selected-parent, blue/daa score, chain-block flag). AI agent API for DAG-aware indexers. Informational research data — not investment advice.
  • GET/kaspa-derivatives/recent-blocksNo price listedRecent Kaspa blocks (max 144 per call = $1.44 cap). Optional chain_only flag to filter selected-parent chain blocks. AI agent API for backtesters and indexers. Informational research data — not investment advice.
  • GET/subtensor-derivatives/registration-pulseNo price listedBittensor NeuronRegistered count per hour. Tracks new neurons joining subnets — useful for detecting subnet growth/decay and registration-burn pressure. AI agent API for subnet-health analysts. Informational research data — not investment advice.
  • GET/bittensor-derivatives/alpha-price-history/:netuidNo price listedTime-series of alpha-token price for a single Bittensor subnet (window: 1h/24h/7d/30d). Sourced from bittensor_alpha_prices captured every 10 minutes. AI agent API for alpha-token trading signals. Informational research data — not investment advice.
  • GET/btc-derivatives/fee-curveNo price listedBitcoin smart-fee curve for 1/3/6/12/24/144-block confirmation targets + trend classification (rising/stable/falling/surging) from 2h moving average.
  • GET/kaspa-derivatives/timeseriesNo price listedHistorical Kaspa network metrics as server-side aggregated timeseries (max 1000 points): hashrate, difficulty, DAG block rate, mempool depth, DAA score, tip count, circulating supply, percent mined; peer count only until 2026-08-10. Collected continuously by our own infrastructure (own Kaspa node until 2026-08-10, since then snapshots of the public api.kaspa.org). Informational research data — not investment advice.
  • GET/bittensor-derivatives/subnet/:netuid/validatorsNo price listedTop-N validators ranked by incentive for tracked Bittensor subnets. Filter only validator_permit=true neurons. AI agent API for validator-selection and stake-delegation decisions. Informational research data — not investment advice.
  • GET/subtensor-derivatives/block-metricsNo price listedRecent per-block aggregation of Bittensor events: neuron_registrations, weight_sets, bond_sets, child_key_sets, stake_added/removed, root_claimed, balance_transfers + total TAO.
  • GET/btc-derivatives/mempool-pressureNo price listedBitcoin mempool pressure classification (low/medium/high/extreme) + fee buckets (0-1, 1-2, 2-5, 5-10, 10-20, 20-50, 50-100, 100-200, 200+ sat/vB) + RBF count + CPFP candidate count. Updated every 5 min.
  • GET/btc-derivatives/diversityNo price listedBitcoin own-node peer-network diversity (IPv4/IPv6/Tor/I2P/CJDNS distribution) + privacy share. AI agent API for privacy researchers, node-operator tooling, network-health analytics. Informational research data — not investment advice.
  • GET/bittensor-derivatives/network-fundamentalsNo price listedLatest TAO network-wide fundamentals: total issuance, total stake, free float, supply percentage mined, stake ratio. Snapshot every 10 min.
  • GET/kaspa-derivatives/fee-estimateNo price listedKaspa live fee market: priority/normal/low feerate buckets from the node's own estimator (Toccata RPC). Informational research data — not investment advice.
  • GET/subtensor-derivatives/events/:block_numberNo price listedAll Bittensor substrate events for a single finalized block (event_idx, phase, module_id, event_id, attributes). AI agent API for detailed forensic analysis of specific blocks. Informational research data — not investment advice.
  • GET/btc-derivatives/coin-days-destroyedNo price listedHourly Bitcoin Coin Days Destroyed proxy (consolidation_ratio × fee_weight × volume) + whale-tx contribution. ⚠️ PROXY methodology — suitable for trend signals, not absolute reserve-coin-age accounting.
  • GET/bittensor-derivatives/subnet/:netuidNo price listedPer-subnet Bittensor snapshot: static metadata (modality/owner/burn/kappa/rho) + latest Tier-A metrics + current alpha-token price. Covers all 129 mainnet subnets.
  • GET/btc-derivatives/ordinals-flowNo price listedHourly Bitcoin Ordinals inscriptions + OP_RETURN byte volume. Inscriptions detected via witness-envelope magic bytes (\u0000cord). Window up to 7d.
  • GET/btc-derivatives/blocks/:heightNo price listedDeep per-block Bitcoin extract. Returns miner-pool attribution, witness/taproot adoption %, Ordinals inscription count, OP_RETURN byte volume, fee percentiles (10/25/50/75/90), UTXO delta, segwit %, total output BTC, block weight.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 25 of 33 listed endpoints. Next endpoints

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/api.carbon-cashmere.de

Recent checks

5 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026
All 9 checks
When (UTC)ResultHTTPResponse
16 Oct, 23:40 UTCChallenge detected402612ms
15 Oct, 19:10 UTCChallenge detected402579ms
14 Oct, 14:31 UTCChallenge detected402455ms
12 Oct, 10:53 UTCChallenge detected402465ms
10 Oct, 15:44 UTCChallenge detected402538ms
9 Oct, 09:34 UTCChallenge detected402416ms
8 Oct, 06:42 UTCChallenge detected402417ms
7 Oct, 03:32 UTCChallenge detected402413ms
5 Oct, 05:04 UTCChallenge detected402487ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 23:40 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for api.carbon-cashmere.de?

Its listed price is $0.02.

What payment terms does api.carbon-cashmere.de advertise?

The listing advertises x402, Algorand, Arbitrum, Base, EVM chain 480, Polygon, Solana, Stellar and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is api.carbon-cashmere.de listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

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